SIMcom SIM8918NA LTE Wireless Data Module User Manual
- June 15, 2024
- SIMcom
Table of Contents
- SIM8918NA LTE Wireless Data Module
- Product Information
- Specifications
- Package Information
- Hardware Block Diagram
- Power Supply and Charging
- Memory and Storage
- Camera
- Q: What is the power supply range for the SIM8918EASIM8918NA
- Q: How much storage does the module have?
- Q: What is the maximum capacity supported by the external SD
SIM8918NA LTE Wireless Data Module
Product Information
Specifications
-
Processor: 64-bit Arm Cortex-A53 Quad-cores at 2.0GHz with
512KB L2 cache -
Memory: 2*16-bitBUS LPDDR4x SDRAM design
-
Storage: Built-in eMMC 5.1 Flash, 16GB eMMC + 2GB LPDDR4x (or
32GB eMMC+3GB LPDDR4x option, or 8GB eMMC + 1GB LPDDR3 option) -
SD: SDC2 external interface supports SD3.0 TF card (Maximum
256G), support hot plug detection -
Operation System: Support Android 12/13
-
System Upgrade: Upgrade via USB interface, support forced
download -
Power Supply: Power Domain: 3.4V~4.4V, support single-cell
lithium battery power supply -
Charge Display: Internal charger, supports high charging
current up to 1.8A -
Camera: One 4-Lane MIPI_DSI interface, the highest resolution
is 720*1680, HD+. Two CSI MIPI configurable 4/4 or 4/2/1 D-PHY2.5
Gbps /channel -
Video Codec
-
Audio: Audio Codec Voice Codec
-
USB UART
-
I2C SPI UIM Card
-
Power Level: Class 3 (24dBm+1/-3dB) for WCDMA bands
-
LTE Features
-
UMTS Features
-
GSM Features
-
WLAN Features
-
BT Features
-
Satellite Positioning: GPS /GLONASS /BEIDOU/Galileo
-
Temperature: Operation Temperature: -35~ +75 Extend Operation
Temperature: -40 ~ +85 Storage Temperature: -40~ +90 -
Physical Size
Package Information
Hardware Block Diagram
Product Usage Instructions
Power Supply and Charging
The SIM8918EASIM8918NA module requires a power supply in the
range of 3.4V to 4.4V. It supports single-cell lithium battery
power supply.
To charge the module, connect it to a power source using the
provided charger. The module supports high charging current up to
1.8A.
Memory and Storage
The SIM8918EASIM8918NA module has built-in eMMC 5.1 Flash for
storage. The available storage options are:
- 16GB eMMC + 2GB LPDDR4x
- 32GB eMMC+3GB LPDDR4x (option)
- 8GB eMMC + 1GB LPDDR3 (option)
The module also supports external SD card storage using the SDC2
interface. It supports SD3.0 TF cards with a maximum capacity of
256GB and hot plug detection.
Camera
The SIM8918EASIM8918NA module supports camera functionality. It
has one 4-Lane MIPI_DSI interface for display and two CSI MIPI
interfaces for camera input. The highest resolution supported is
720*1680, HD+.
FAQ
Q: What is the power supply range for the SIM8918EASIM8918NA
module?
A: The power supply range is 3.4V to 4.4V.
Q: How much storage does the module have?
A: The module has built-in eMMC 5.1 Flash with options for 16GB,
32GB, or 8GB storage.
Q: What is the maximum capacity supported by the external SD
card interface?
A: The external SD card interface supports SD3.0 TF cards with a
maximum capacity of 256GB.
SIM8918EASIM8918NA User Manual
LTE Wireless Data Module
SIMCom Wireless Solutions Limited
SIMCom Headquarters Building, Building 3, No. 289 Linhong Road, Changning
District, Shanghai P.R. China Tel: 86-21-31575100 support@simcom.com
www.simcom.com
SIM8918EA_SIM8918NA_User Manual
GENERAL NOTES
SIMCOM OFFERS THIS INFORMATION AS A SERVICE TO ITS CUSTOMERS, TO SUPPORT
APPLICATION AND ENGINEERING EFFORTS THAT USE THE PRODUCTS DESIGNED BY SIMCOM.
THE INFORMATION PROVIDED IS BASED UPON REQUIREMENTS SPECIFICALLY PROVIDED TO
SIMCOM BY THE CUSTOMERS. SIMCOM HAS NOT UNDERTAKEN ANY INDEPENDENT SEARCH FOR
ADDITIONAL RELEVANT INFORMATION, INCLUDING ANY INFORMATION THAT MAY BE IN THE
CUSTOMER’S POSSESSION. FURTHERMORE, SYSTEM VALIDATION OF THIS PRODUCT DESIGNED
BY SIMCOM WITHIN A LARGER ELECTRONIC SYSTEM REMAINS THE RESPONSIBILITY OF THE
CUSTOMER OR THE CUSTOMER’S SYSTEM INTEGRATOR. ALL SPECIFICATIONS SUPPLIED
HEREIN ARE SUBJECT TO CHANGE.
COPYRIGHT
THIS DOCUMENT CONTAINS PROPRIETARY TECHNICAL INFORMATION WHICH IS THE PROPERTY
OF SIMCOM WIRELESS SOLUTIONS LIMITED COPYING, TO OTHERS AND USING THIS
DOCUMENT, ARE FORBIDDEN WITHOUT EXPRESS AUTHORITY BY SIMCOM. OFFENDERS ARE
LIABLE TO THE PAYMENT OF INDEMNIFICATIONS. ALL RIGHTS RESERVED BY SIMCOM IN
THE PROPRIETARY TECHNICAL INFORMATION INCLUDING BUT NOT LIMITED TO
REGISTRATION GRANTING OF A PATENT , A UTILITY MODEL OR DESIGN. ALL
SPECIFICATION SUPPLIED HEREIN ARE SUBJECT TO CHANGE WITHOUT NOTICE AT ANY
TIME.
SIMCom Wireless Solutions Limited SIMCom Headquarters Building, Building 3,
No. 289 Linhong Road, Changning District, Shanghai P.R. China Tel: +86 21
31575100 Email: simcom@simcom.com
For more information, please visit:
https://www.simcom.com/module/smart_modules.html
For technical support, or to report documentation errors, please visit:
https://www.simcom.com/ask/ or email to: support@simcom.com
Copyright © 2021 SIMCom Wireless Solutions Limited All Rights Reserved.
www.simcom.com
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1 Introduction
SIM8918EA_SIM8918NA_User Manual
1.1 Product Outline
SIM8918x series module is a 4G Android smart module developing by the platform
of Qualcomm QCM2290 a 64-bit applications processor with Arm Cortex-A53 quad-
cores at 2.0GHz with 512KB L2 cache. SIM8918x series module has abundant
multi-media functions, including the 1080P@30 fps video codec, the HD+
720*1680@60Hz displaying screen, two MIPI-CSI cameras, and the multi-channel
analogand digital-audio input and output. SIM8918x series module supports
multiple communication modes, including the GSM/GPRS/EDGE, the WCDMA/HSPA+,
the LTE-FDD, and the LTE-TDD. It also supports the WiFi 802.11 a/b/g/n/ac, and
the BT4.x short range communication. For the satellite positioning system,
SIM8918x series module supports the GPS, the GLONASS, the BEIDOU, and the
Galileo. In conclusion, SIM8918x series module is a highly integrated product,
which is widely applying to intelligent terminal devices in the field of the
Internet of Things (IOT). Model Name: SIM8918EA,SIM8918E Product Name: LTE
Wireless Data Module Brand name: SIMCom
1.2 Functional Overview
Feature
Description
Processor Memory
64-bit Arm Cortex-A53 Quad-cores at 2.0GHz with 512KB L2 cache 1804MHz clock
2*16-bitBUS LPDDR4x SDRAM design Built-in eMMC 5.1 Flash,
16GB eMMC + 2GB LPDDR4x
Or 32GB eMMC+3GB LPDDR4x (option)
Or 8GB eMMC + 1GB LPDDR3 (option)
SD
Operation System System Upgrade
Power Supply Charge Display
Camera
SDC2 external interface supports SD3.0 TF card (Maximum 256G), support hot plug detection Support Android 12/13 Upgrade via USB interface, support forced download Power Domain: 3.4V~4.4V, support single-cell lithium battery power supply. Internal charger, supports high charging current up to 1.8A One 4-Lane MIPI_DSI interface, the highest resolution is 720*1680, HD+. Two CSI MIPI configurable 4/4 or 4/2/1 D-PHY2.5 Gbps /channel
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Video Codec
Audio
Audio Codec Voice Codec
USB UART
I2C SPI UIM Card
Power Level
SIM8918EA_SIM8918NA_User Manual
C-PHY~10 Gbps3.42 Gbps/channel Single ISP: 13 MP 30 ZSL; dual ISP: 25 MP 30
ZSL Real time sensor input resolution: 25MP or 13MP+13MP Encode: 1080p30 8-bit
HEVC(H.265),H.264 Decode: 1080p30 8-bit H.264, HEVC(H.265),VP9 Concurrency:
1080p30 decode + 720p 30 encode 1-Channel Digital Audio Interface I2S: Support
Master- and Salve-Mode 3-Channel Analog Audio Input Master Microphone MIC1:
Differential Input Headphone Microphone MIC2: Single-end Input De-noise
Microphone MIC3: Differential Input 4-Channel Digital Microphone Input
3-Channel Analog Audio Output Headphone: Class AB Amplifier Stereo Output
Receiver: Class AB Amplifier Differential Output Lineout: Class AB Amplifier
Differential Output MP3, AAC, He-AAC v1, v2, FLAC,APE, ALAC, AIFF EVS, EVRC,
EVRC-B, and EVRC-WB G.711 and G.729A/AB GSM-FR, GSM-EFR, and GSM-HR AMR-NB and
AMR-WB Support USB 3.1, support USB2.0 Support USB Type-C Interface Support
OTG USB_VBUS OTG Mode 5V Power Output (500mA Typical) Support up to 3 Serial
Ports A 2-Wire Serial Port for Debug Two 4-Wrie Serial Ports support hardware
flow control, High-speed up to 4Mbps. Support up to seven I2C for touch
screen, camera, sensor and other peripherals Support up to 2*SPI interfaces,
support master mode, the highest rate 50MHz Support Dual Card Dual Standby:
1.8V/3.0V Dual Voltage
Class 4 (33dBm±2dB) for EGSM850
Class 4 (33dBm±2dB) for EGSM900
Class 1 (30dBm±2dB) for DCS1800
Class 1 (30dBm±2dB) for PCS1900
Class E2 (27dBm±3dB) for EGSM850 8-PSK
Class E2 (27dBm±3dB) for EGSM900 8-PSK
Class E2 (26dBm±3dB) for DCS1800 8-PSK
Class E2 (26dBm±3dB) for PCS1900 8-PSK
Class 3 (24dBm+1/-3dB) for WCDMA bands
Class 3 (23dBm±2dB) for LTE-FDD bands
Class 3 (23dBm±2dB) for LTE-TDD bands
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SIM8918EA_SIM8918NA_User Manual
LTE Features UMTS Features
GSM Features
WLAN Features
BT Features Satellite
Positioning Temperature Physical Size
Support 3GPP R10 CAT4 FDD and TDD Support 1.4 to 20 MHz RF Bandwidth Support
Downstream 2×2 MIMO FDD: the maximum 150Mbps(DL) / the maximum 50Mbps(UL) TDD:
the maximum 150Mbps(DL) / the maximum 35Mbps(UL) Support 3GPP R8 DC-
HSDPA/HSPA+/HSDPA/HSUPA/WCDMA Support 16-QAM, 64-QAM and QPSK modulation DC-
HSDPA: maximum 42Mbps(DL) HSUPA: maximum 5.76Mbps(UL) WCDMA: maximum
384Kbps(DL) / maximum 384bps(UL) R99: CSD: 9.6Kbps, 14.4Kbps GPRS: Support
GPRS Multi-Slot Level 33(Default 33) Coding format: CS-1, CS-2, CS-3, and CS-4
Maximum 85.6Kbps(UL) / Maximum 107Kbps(DL) EDGE: Support EDGE Multi-Slot Level
33(Default 33) Support GMSK and 8-PSK modulation and coding Methods Downlink
Coding Format: CS 1-4 and MCS 1-9 Uplink Coding Format: CS 1-4 and MCS 1-9 The
maximum 236.8Kbps(UL) / The maximum 296Kbps(DL) 2.4G/5G Dual Frequency Range,
Support 802.11a/b/g/n/ac, Maximum 433Mbps Support the Wake-on-WLAN. Support
the WAPI SMS4 hardware encryption. Support the AP mode and the STATION mode.
Support the WIFI Direct. Support the 2.4G MCS 0~8 for HT20 and VHT20. Support
the 2.4G MCS 0~7 for HT40 and VHT40. Support the 5G MCS 0~7 for HT20, HT40
Support the 5G MCS 0~8 for VHT20. Support the 5G MCS 0~9 for VHT40 and VHT80.
BT2.1+EDR /3.0 /4.2 LE/5.x
GPS /GLONASS /BEIDOU/Galileo
Operation Temperature: -35~ +75 Extend Operation Temperature: -40 ~ +851
Storage Temperature: -40~ +90
Size: 40.5(±0.2)40.5(±0.2)2.85(±0.2)mm
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SIM8918EA_SIM8918NA_User Manual
2 Package Information
2.1 Hardware Block Diagram
720*1680 LCD REAL Cam(25MP) Front Cam(25MP)
Type-C USB UIM Card1 UIM Card2 SD Card TP/Sensor/others
VPH_PWR VRTC Poweron singals GPIO Haptics output
USB_IN VPH_PWR Battery
GPIOs Flash output Charge LED Analog Micphone Earphone Headset LINEOUT
4-Lane DSI0 4-Lane CSI0 4-Lane CSI1
LC_networks
USB HS/USB_SS0+SS1 UIM1 UIM2 SDC2
I2C/I3C/SPI/UART GPIOs
Input/Output
Power Management
4 SMPS output
LC_networks
24 VREG output
IC-level interface
SPMI BUS
Analog inputs Clocks
User interfaces
General
houseke eping
38.4M XO
Pon singals
Charger
IC-level interface User inter faces
Audio Codec
AP
64-bit Arm CortexA53
Camera ISP/ VFE/Jpeg HW
Display Processor Video
Graphics Peripherals
Modem
4G/3G/2G MODEM Core
MODEM/Voice Processor
GNSS Baseband
Baseband
BT/WIFI Baseband
Codec Digital
Memory Support
RFFE1 RFFE2 TX_DAC I/Q PRX_CA1 I/Q
DRX_CA1 I/Q GPS_ADC I/Q
Transceiver
RFFE5
Front End Tx Module
MAIN
PA
Switch
DRX
LNA
GNSS
WLAN RX I/Q WLAN TX I/Q WLAN CNTRL clk/data WLAN-BT coex clk/data SSC data
2-wire
BT control/data 4-wire BT audio clk/data WLAN_CLK 38.4M
WCN 38.4M XO
BT/WiFi
RF_CLK 38.4M Sleep_CLK 32K
EBI0/EBI1 SDC1
eMMC flash + LPDDR4x
Figure 1: Module Block Diagram
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2.2 Pin Assignment Overview
SIM8918EA_SIM8918NA_User Manual
146 VBAT 145 VBAT 144 GND 143 GND 142 USB_VBUS 141 USB_VBUS 140 GND 139 HS_DET
138 HPH_L 137 HPH_GND 136 HPH_R 135 GND 134 BAT_THERM 133 BAT_P 132 GND 131
ANT_DRX 130 GND 129 VDD_2V8 128 ADC 127 PM_GPIO_8 126 VRTC 125 LDO_IOVDD 124
PM_GPIO_3 123 GPIO_60 122 GND 121 ANT_GNSS 120 GND 119 GPIO_15 118 GPIO_14 117
GPIO_17 116 GPIO_16 115 PM_GPIO_4 114 PWR_KEY_N 113 GPIO_58
GPIO 57 112 111 VREG_15A_1V8
SD_VDD 38
SD_CLK 39
SD_CMD 40
SD_DATA0 41
SD_DATA1 42
LCD_RST 49
LCD_TE 50
VVBBAATT 21
GND 3
MIC1_P 4
MIC1_N 5
MIC2_P 6
GND 7
EAR_P 8
EAR_N LINEOUT_P
9 10
LINEOUT_M 11
GND
USB_DM USB_DP
GND
12 13
14
RESERVED USIM2_DET
15 16
USIM2_RST 17 *
USIM2_CLK 18
USIM2_DATA USIM2_VDD
19
20 *
USIM1_DET 21
USIM1_RST 22 *
USIM1_CLK 23
USIM1_DATA 24
USIM1_VDD 25
GND VIB_DRV_P
26
PWM 27
TP_INT_N 28 TP_RST_N 29
SD_LDO4 30 *
GPIO_28 31 UART0_TXD 32
UART0_RXD 33
UART0_CTS 34
UART0_RTS 35
36 *
37
186
CBL_PWR_N
147
MIC_BIAS1
187
GND
148
MIC3_P
188
GND
149
MIC3_N
189
GND
150
USBSS2 TX_P
190
GND
151
USBSS2
TX_M
191
GND
152
USBSS2 RX_P
192
USB_SS2_RX _M
153 *
UART1_RXD
193
RESERVED
154 *
UART1_TXD
194
GNSS_L NA_EN
155
MIC_BIAS3
195
CHG_LED
156
196
VREG_17A_3V0 CSI0_CLK_P
157
CSI0_CLK_N
185
BAT_ID
184
VPH_PWR
222
221
GND
GND
223
GND
224
GND
250
GND
251
GND
225
RESET_N
252
USBSS1 RX_P
226
GND
227
GND
253
USB_SS1 _TX_M
254
USBSS1 TX_P
228
255
GND
GND
229
256
GND
GND
230
231
GND
GND
197
CSI0_LN0_P
198
CSI0_LN1_P
158
CSI0_LN0_N
159
CSI0_LN1_N
183
BAT_M
220
GND
249
USB_CC1
270
USBSS1 RX_M
271 GND
272 GND
273 GND
274 GND
257
RESERVED
232
RESERVED
199
CSI0_LN2_P
160
CSI0_LN2_N
5 5 5 6
5 7
5 8 5 9
182 *
GPIO_86
181
NFC_CLK
180
FLASH_LED
179
RESERVED
-
- 178
RESERVED
- 178
177 *
GPIO_112
219
218
217
216
215
214
GND
GND
GND
GND
GND
GND
248
GND
269
GND
247
GND
246
USB_CC2
245
GND
268
GND
267
GPIO_111
266
GND
244
GND
243
GND
213
GND
212
GND
282 GND
281 GND
280 GND
265
GPIO_98
242
RESERVED
283 GND
286 GND
SIM8918
284
GND
275 GND
285 GND
276 GND
258
259
GND
GND
279 GND
278 GND
277 GND
260
GRFC_14
264
GPIO_100
241
GND
263
RESERVED
240
GND
262
GRFC_15
239 *
GPIO_101
261
GND
238
GND
211
GND
210
GND
209
GND
208
GND
207
GND
233
234
235
236
237
206
GND
GND
GND
GND
GND
GND
200
CSI0_LN3_P
201
PM_GPIO_7
202
GND
203
GND
204
GND
205
CAM1_I2 C_SDA
161
CSI0_LN3_N
162
GND
163
CAM2_PWDN
164 *
CAM2_RST
165 *
CAM_ MCLK2
166
CAM1_I2 C_SCL
GND 51
DSI_CLK_N 52
DSI_CLK_P 53
DSI_LN0_N 54
DSI_LN0_P DSI_LN1_N DSI_LN1_P
DSI_LN2_N
DSI_LN2_P DSI_LN3_N
GND 68
176
GND
175
RESERVED
174
RESERVED
173
GRFC_13
172
GND
171
GND
170
LPIGPIO 26
169
LPIGPIO 25
168
SNSR_ I3CSCL
167
SNSR I3C_SDA
111009 *108
GPIO_36 GPIO_34 GPIO_33
*107
106
GPIO_35 GPIO_56
*105 GPIO_99
104 110023
GPIO_102 GPIO_103 GPIO_105
*101 GPIO_104
GPIO_55
100 GPIO_32
-
99 GPIO_107
-
98 * 97
96
GPIO_31 VOL_DOWN VOL_UP
-
95 DEBUG_TXD
94 DEBUG_RXD -
93 SENSOR_I2C_SDA
92 91
SENSOR_I2C_SCL GGPNIDO_106
- 90
89 88 87
86 85
84
83 82 - 81 80 79
78 77
76 75 74
GND ANT_MAIN GND GND
CAM0_I2C_SDA CAM0_I2C_SCL
CAM1_PWDN
CAM1_RST CAM0_PWDN CAM0_RST GND ANT-WIFI/BT GND CAM_MCLK1
CAM_MCLK0
7 3
Note: GPIOs with * can be used to wake up the
module.
SDC2 USB UART USIM AUDIO GPIO Antenna TP LCM Camera Others RESERVED
POWER GND
CSI1_LN2_P 72
CSI1_LN2_N 71
CSI1_LN3_P 70
CSI1_LN3_N 69
CSI1_LN1_P 67
CSI1_LN1_N 66
CSI1_LN0_P 65
DSI_LN3_P 60 GND 61 6 2
CSI1_CLK_N CSI1_CLK_P 63 CSI1_LN0_N 64
TP_I2C_SCL 47 TP_I2C_SDA 48
SD_DATA2 43 SD_DATA3 44
SD_DET 45 USB_BOOT 46
Figure 2: Pin Assignment Overview
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SIM8918EA_SIM8918NA_User Manual
2.3 Top- and Bottom-View of the Module
Figure 3: View of the Module
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2.4 Mechanical Dimensional Size
SIM8918EA_SIM8918NA_User Manual
Figure 4: Three-Dimensional Size (Unit: mm)
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SIM8918EA_SIM8918NA_User Manual
3 Interface Applications
3.1 Power Supply
The SIM8918x module operating power (VBAT) is 3.4V to 4.4V, and the typical
voltage is 3.9V. The instantaneous peak current of the SIM8918x module could
reach 3A. So, to enable the module is running smoothly, the power supply
should be able to provide the peak current up to 3A. If the power supply is
designed improperly, there would be a large voltage drop on the VBAT. The
shutdown voltage of the SIM8918x module is 3.2V. If the voltage drop on the
VBAT is lower than 3.2V, the module would power off.
3.1.1 Pin Overview
SIM8918x series module supports a single lithium battery power supply (4.2V or 4.35V battery cell). It also supports the other types of batteries. But the maximum voltage could not exceed the maximum allowance voltage of the module. Otherwise, the module would be burned. In terms of the non-battery power supply applications, the module would power by an LDO when the DC input is up to 5V. The reference design is showing in Figure 3.
DC INPUT
+ C101
100uF
C102 1uF
U101 MIC29302
2 Vin
Vout 4
1 On/Off
FB 5
GN D
PWR_CTRL
3
VBAT
R101 100K
R102 43K
+ C103 C104 330uF 100nF
R103 470R
Figure 5: LDO Power Supply Reference Design
Highly recommend selecting a relative high efficiency switching power supply for hardware design when the difference between the input (DC Input) and the output (VBAT) is too large.
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SIM8918EA_SIM8918NA_User Manual
DC INPUT
U101 LM2596-ADJ
1 Vin
Vout 2
+ C101 C102
5
100uF
On/Off
1uF
PWR_CTRL
3
GN D
FB 4
L101
100uH
+ D102 C103
330uF MBR360
FB101
VBAT
C104 100nF
270R@100MHz R101 2.2K
R102 1K
NOTE
Figure 6: DC-DC Power Supply Reference Design
1. Highly recommend disconnect the VBAT power supply to power off the module
when the module is running abnormally. After that, restart the module by
powering.
2. The module supports the charging function. There is a need to turn off the
charging function in the software patch when the customers are using the power
supply without the charging function. Or connect Schottky diodes in series on
the VBAT channel to prevent the current anti-flowing into the chip.
3.1.2 Power Supply Stability Design
Highly recommend place bypass capacitors and voltage stabilizing components
near the VBAT Pin to enhance the stability of the power supply. The reference
design is showing in the Figure 5.
VBAT
SIM8918x Module
GND
C105 C104 C103
10pF
33pF
10uF
C102 100uF
C101 100uF
VBAT
D101 5V
1600W
Figure 7: DC-DC Power Supply Reference Design
C101 and C102 are two Low-ESR 100uF tantalum capacitors. C103 is a 1uF to 10uF
ceramic capacitor. The function of C104 and C105 is to decrease the high
frequency interference. D101 is a 5V/1600W transient voltage suppression
diode, preventing the chip from being damaged by surge. For PCB wiring, the
capacitors and the diodes should be close to the VBAT Pin as far as possible,
and the VBAT wiring should
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be as short as possible with the width at least 3mm.
SIM8918EA_SIM8918NA_User Manual
Vendor
1
PRISEMI
2
PRISEMI
Manufacture Number
PTVSHC3N4V5B PTVSHC2EN5VU
Power(Watts)
2800W 1600W
Package
DFN2020-3L DFN1610-2L
3.2 Power On & Power Off
The on-off of the SIM8918x series module has two status, including the normal
on-off and the abnormal on -off. In terms of the high- and low-pressure, and
the high- and low-temperature, it should be working within the maximum power
domain when running the module. Otherwise, exceeding the absolute maximumpower
domain would cause permanent damage to the module.
3.2.1 Power On
PWR_KEY_N (114 Pin) defines as the boot-up key when the VBAT is powering on, and triggering PWR_KEY_N with at least 2s low-level pulse starts the module. KPD_PWR_N Pin has internal pull-up, and the typical high-level voltage is 1.2V. The reference design is showing as below.
1.8V
PWR_KEY_N
R 1K
PMU
SIM8918x Module
Figure 8: Power On/Off Design with a Key
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SIM8918EA_SIM8918NA_User Manual
1.8V
PWR_KEY_N
R 1K
Pulse
4.7K 47K
PMU
SIM8918x module
Figure 9: Power On/Off Design with an OC Gate Highly recommend the customers consider the PWR_KEY_N Pin’s electrical characteristics when designing. The electrical characteristics are showing in following
Parameters Description
VIH
High-Level Input Voltage
VIL
Low-Level Input Voltage
Minimum Typical
0.8
–
–
–
Maximum Unit
–
V
0.6
V
3.2.2 Power On Sequence
Figure shows the power on sequence of the module.
VBAT
T>50ms
t>2s
PWR_KEY_N
VREG_L15A_1P8 VREG_L17A_3P0
LDO_2V8 LDO_IOVDD
128ms SW control
SW control
Figure 10: Power On/Off Design with an OC Gate
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SIM8918EA_SIM8918NA_User Manual
NOTE
Highly recommend pulling down the PWR_KEY_N Pin when booting up the VBAT
voltage at 3.8V stabilizing for at least 50ms. Do not pull down the PWR_KEY_N
Pin all the time.
3.2.3 Power Off
Pull down the PWR_KEY_N Pin with at least 1s to power off the module. There is
a pop up prompt window confirming the action of shutting down the device when
the module detects the control instructions. Apart from that, pulling down the
PWR_KEY_N Pin with over 8s would be forced to restart the module.
Powering on and powering off are using the same pin, and they have the same
reference design.
NOTE
1. The hardware design should cove the function of powering off the module.
It is forbidden to run the module when powering off or restarting. Forced
powering off the module adopts only when the module is running abnormally.
2. Highly recommend adding a low-cost MCU to control the PWR_KEY_N. Not only
for the normal powering on and powering off but also for the watchdog function
to protect the operation system.
3. Do not cut off the VBAT power supply directly when the module is running
smoothly. It is to protect the internal flash memory.
4. Highly recommend to power off the module by the PWR_KEY_N Pin or the AT
command before disconnecting the VBAT power supply.
3.3 VRTC
The VRTC is a standby power supply, connecting with a button battery or a
large capacitor. VRTC would help to maintain the RTC timing when the VBAT is
powering off. VRTC would also work as charging the button battery or a large
capacitor when the VBAT is powering on.
If the RTC fails, the RTC clock could be synchronized by connecting the data
when the module is powering on.
Please refer to the Table 10 for VRTC characteristics. The input power domain
for the VRTC voltage supply is 2.0V to 3.25V. The typical voltage is 3.0V.
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SIM8918EA_SIM8918NA_User Manual
The average current consumption is 10uA when disconnecting the VBAT and
connecting the RTC only. When powering on via the VBAT, the RTC working error
is 50ppm. Switching the power supply mode of the VRTC Pin cause the RTC
working error is 200ppm. Highly recommend the ESR of the button battery is
less than 2K when connecting an external rechargeable button battery. Highly
recommend to pick SEIKO’s MS621FE FL11E. Highly recommend the ESR of the
capacitor is 100uF when connecting an external large capacitor.
The reference designs for VRTC are showing below.
External Capacitor Power Supply for RTC
Large Capacitor
VRTC
Module
RTC Circuit
Figure 11: External Capacitor Power Supply for RTC
Non Rechargeable Battery Power Supply for RTC
Non Rechargeable
Battery
VRTC
Module
RTC Circuit
Figure 12: Non Rechargeable Battery Power Supply for RTC www.simcom.com
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SIM8918EA_SIM8918NA_User Manual
Rechargeable Battery Power Supply for RTC
Rechargeable Battery
VRTC
Module
RTC Circuit
Figure 13: Rechargeable Battery Power Supply for RTC
The typical voltage of the VRTC is 3.0V. And the average current consumption
is 20uA when disconnecting the VBAT and connecting the RTC only. The VRTC
characteristics are showing in Table 13.
Parameters
VRTC-IN T- series resistance
IRTC-IN
Accuracy Power ON Power OFF
Description
VRTC Input Voltage Standby Battery connecting in series resistor VRTC Current
Consumption VBAT=0V
Power ON Power offVBAT on Power onVBAT=0
Minimum Typical
2.0
3.0
800
–
–
10
–
–
–
–
–
–
Maximum Unit
3.25
V
2000
–
uA
24
ppm
50
ppm
200
ppm
NOTE
1 If the VBAT is connecting an external non-removable rechargeable battery,
float the VRTC Pin. Also, the software should be modified to turn off the VRTC
charging instructions.
2 If the VBAT can be turn off and external Coin-cell battery doesn’t useit is
recommended that a minimal 47uF capacitor add on VRTC pin.
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3.4 Power Output
SIM8918EA_SIM8918NA_User Manual
SIM8918x series module has 18 power outputs in total, which are suitable for a wide range of external interfaces and peripherals. Highly recommend a capacitor of 33pF and a capacitor of 10pF parallel connection to the ground, which could prevent high-frequency interference effectively.
Power Name
VPH_PWR
VREG_L15A_1P8
USIM1_VDD USIM2_VDD SD_LDO4 SD_VDD VREG_L17A_3P0 LDO_IOVDD VDD_2V8 MIC_BIAS1
MIC_BIAS3
PIN Num
184
111
26 21 32 38 129 125 129 147 155
Output Voltage (V)
3.4~4.4
1.8
1.8/2.95 1.8/2.95 3.0 3.0 3.0 1.8 2.8 1.6-2.85V 1.8
Rated Current (mA)
2000
300
150 150 22 800 200 300 300 6 6
Default On
ON
ON
Off Off Off Off Off ON
ON Off Off
Description
Generated by either the charger or the battery External Power and External
GPIO pull up and the 1.8V power level conversion SIM Card1 Power SIM Card2
Power SD Card pull-up Power SD Card Power Power for sensor LCM DVDD or camera
IOVDD Camera AVDD Microphone Bias Microphone Bias
3.5 Charging and Battery Management
SIM8918x series module supports high charging current up to 1.8 A (100 mA step
size).Supports trickle chargepre-chargeconstant current chargingand constant
voltage charging. The module integrates the internal charging temperature
rising control function. Decreasing the charging voltage and the charging
current happens automatically when the temperature is too high.
SIM8918x series module could charge the battery. It supports several charging
modes, including the trickle charging mode, the pre-charging mode, the
constant current charging mode, and the other charging modes.
The Trickle Charging Mode: The system is running into the trickle charging
mode when the voltage of the battery is lower than
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SIM8918EA_SIM8918NA_User Manual
2.1V. In this case, a charging current of 100mA (typical) is applied. The Pre-
charging Mode:
The system is running into the pre-charging mode when the voltage of the
battery is between 2.1V and 3.0V (The cut-off voltage is programmable between
2.4V and 3.0V, Default 3.0V). The charging current is about 300mA (The current
is programmable between 100mA and 450mA, Default 300mA). The Constant Current
Charging Mode: The system is running into the constant current charging mode
when the voltage of the battery is between the cut-off voltage of the pre-
charging mode and 4.2V (The voltage is programmable between 3.6V and 4.2V,
Default 4.2V). The charging current is programmable between 0mA and 1800mA
(The Default USB charging current is setting at 500mA in the software
configuration). The Constant Voltage Charging Mode: The system is running into
the constant voltage charging mode when the voltage of the battery is reaching
at the predefined float voltage. The charging status would stop when the
charging current is reaching at setting current.
PIN Name VBAT BAT_ID
BAT_THERM BAT _P BAT _M
PIN Num I/O
1
2
PI/
145
PO
146
Description
Module Power Input, Battery Charge Output
185
AI Battery Detection
134
AI Battery Thermal Detection
133
AI Battery Voltage Detection +
183
AI Battery Voltage Detection –
Note
Don’t be float. Highly recommend an external 100KR resistor connecting to the
ground when no battery ID. Don’t be float. Connect to the battery NTC
Resistor, Highly recommend an external 100KR resistor connecting to the ground
when no battery. Connect to VBAT close to battery. Connect to GND close to
battery.
SIM8918x series module has the function of battery detection. Generally, there is a BAT_ID Pin in the battery. Highly recommend an external 100KR resistor (R2) connecting to the ground when the battery has no BAT_ID. Avoid float.
SIM8918x series module has the function of battery temperature detection. This function requires an integrated thermistor in the battery (Recommend a 100KR ± 1% NTC Resistor). And the NTC resistor needs to connect to the BAT_THERM Pin. The module would charge fail when floating the BAT_THERM pin.
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SIM8918EA_SIM8918NA_User Manual
SIM8918x series module has the function of battery’s fuel gauge. It estimates
the real-time power of the battery accurately. Not only protect the battery
and prevent the over dis-charge but also help the users to estimate the
entertainment time and save the important data. For different types of
batteries, modifying the software settings enables the designated battery
working properly.
The BAT_P Pin and the BAT _M Pin must be connected whether the module is
powering on by a battery or a stable power supply. The module would not work
well if floating these two pins. These two pins are for battery voltage
detection. Differential pair routing and stereo ground plane are needed.
SIM8918x MODULE
BAT_P BAT_M
BATTERY CONNECTOR
VBAT BAT_ID
BAT_THERM GND
R2 100K
R3 100K
VBATT BATT_ID
BATT_THERM
GND NTC
Figure 14: Battery Connection Reference Design
3.6 USB Interface
3.6.1 Micro-USB Interface and Type-C Interface
SIM8918x series module supports a USB interface, complying with USB 3.1/2.0
protocol and supporting USB OTG. The highest speed for the USB3.1 is up to
10Gbps, and for the USB 2.0 is up to 480Mbps. It is downward compatible with
full speed (12Mbps) mode. USB_HS interface supports the function of the AT
command transmission, of the data transmission, of the software debugging, and
of the software upgrading.
SIM8918x series module recommends Type-C USB. When used Micro-USB interfacethe
CC1 pin need to connect to the Micro USB connector`s USB_IDand 10K pull-up
resistor to VBUS.
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The Type-C Interface Reference Design
SIM8918EA_SIM8918NA_User Manual
Figure 15: USB Type-C Connection Reference Design
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The Micro-USB Interface Reference Design
SIM8918EA_SIM8918NA_User Manual
igure 16: USB Micro-USB Connection Reference Design
3.6.2 Micro-USB Interface and Type-C Interface Feature
PIN Name USB_SS1_RX_P/M USB_SS1_TX_P/M USB_SS2_RX_P/M USB_SS2_TX_P/M USB _DP/M USB_CC1/USB_CC2 USB_VBUS
PIN Num 252/270 254/253 152/192 150/151 13/14 249/246 141/142
USB Mode USB_SS1_RX_P/M USB_SS1_TX_P/M USB_SS2_RX_P/M USB_SS2_TX_P/M USB _DP/M CC VBUS
PCB wiring protocols and hardware design notices for USB signals ar listing below. www.simcom.com
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SIM8918EA_SIM8918NA_User Manual
Differential pair routing, 90+-10% differential impedance, and stereo ground
plane are needed.
Reserved ESD protection components close to the USB interface: Highly
recommend the TVS junction capacitance value on the USB2.0 signal lines less
than 2pF. Highly recommend the TVS junction capacitance value on the USB3.1
signal lines less than 0.5pF.
Do not wiring the USB signals under the crystal oscillator, the oscillator,
the magnetic devices, and the RF signals. Highly recommend routing in the
inner layer and stereo ground plane.
Highly recommend the USB2.0 signals, the USB3.1 TX signals, and the USB 3.1 RX
signals are wiring as differential pairs separately.
3.7 UART/SPI/I2C/I2S Interface
SIM8918x series module supports multiple sets of the UART, the I2C, the SPI,
and the I2S. The combination of multiple interfaces is flexible and achievable
by the configuration of GPIOs. The interface voltage is 1.8V.
3.7.1 UART/SPI/I2C Interface Multiplexing
Set PIN Name
UART0_CTS
UART0_RTS 1
UART0_TX
UART0_RX
CAM0_PWDN 2
CAM1_PWDN
TP_I2C_SDA 2
TP_I2C_SCL
DEBUG_TXD 3
DEBUG_RXD
GPIO_14
GPIO_15 4
GPIO_16
GPIO_17
PIN GPIO
Num
36
GPIO_0
37
GPIO_1
34
GPIO_2
35
GPIO_3
80
GPIO_4
82
GPIO_5
48
GPIO_6
47
GPIO_7
94
GPIO_12
93
GPIO_13
118 GPIO_14
119 GPIO_15
116 GPIO_16
117 GPIO_17
Multiplex1 SPI
Multiplex2 UART
Multiplex3 I2C/I3C
SPI1_MISO
UART0_CTS
I2C1_SDA/I3C1_SDA
SPI1_MOSI
UART0_RTS
I2C1_SCL/I3C1_SCL
SPI1_CLK
UART0_TX
SPI1_CS_N
UART0_RX
APPS_I2C_SDA
APPS_I2C_SCL
TP_I2C_SDA
TP_I2C_SCL
DEBUG_UART_TXD
DEBUG_UART_RXD
SPI2_MISO
UART2_CTS
I2C4_SDA
SPI2_MOSI
UART2_RTS
I2C4_SCL
SPI2_SCLK
UART2_TX
SPI2_CS_N
UART2_RX
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SIM8918EA_SIM8918NA_User Manual
CAM0_I2C_SDA
84
5
CAM0_I2C_SCL
83
CAM1_I2C_SDA
205
6
CAM1_I2C_SCL
166
UART1_RXD
153
7
UART1_TXD
154
GPIO_98
265
GPIO_99
105
8
GPIO_100
264
GPIO_101
239
GPIO_105
102
GPIO_104
101
9
GPIO_103
103
GPIO_102
104
SENSOR_I2C_SDA 92 10
SENSOR_I2C_SCL 91
SNSR_I3C_SDA
167
11
SNSR_I3C_SCL
168
GPIO_22
GPIO_23
GPIO_29
GPIO_30
GPIO_70
GPIO_69 GPIO_98 GPIO_99 GPIO_100
DMIC1_CLK DMIC1_DATA DMIC2_CLK
GPIO_101
DMIC2_DATA
GPIO_105
GPIO_104
GPIO_103
GPIO_102 GPIO_109
GPIO_110
LPI_GPIO_21
LPI_GPIO_22
UART1_RXD UART1_TXD LPI_MI2S0_CLK LPI_MI2S0_WS LPI_MI2S0_DATA0 LPI_MI2S0_DATA1 LPI_MI2S1_DATA1 LPI_MI2S1_DATA0 LPI_MI2S1_WS LPI_MI2S1_CLK
CAM0_I2C_SDA CAM0_I2C_SCL CAM1_I2C_SDA CAM1_I2C_SCL
SENSOR_I2C_SDA SENSOR_I2C_SCL SNSR_I3C_SDA SNSR_I3C_SCL
SIM8918x series module defines the default configuration for these pins
highlighting in green. Please consult SIMCom staff to review the reference
design and functions for these pins.
SIM8918x series module supports 2 sets of SPI, 3 sets of UART, and 8 sets of
I2C (including camera’s I2C), 2 sets of I2S. Choosing only one function among
the SPI, the UART, and the I2C in the same bus set. For example, the SPI2 and
the UART2 could not function well at the same time.
Highly recommend an external 2.2KR resister pulling up to the 1.8V power
supply for I2C. Do not reuse the Debug UART as GPIO12 and GPIO13. SPI
interface could support the working frequency up to 50MHz.
3.7.2 UART Voltage Level Shift Circuit
SIM8918x series module supports up to 3 sets of the UART interfaces, including
the 2 sets of the 4-Lane interface, and the Debug UART for debugging. The two
sets of the 4-Lane interface support the hardware flow control with the
highest speed up to 4Mbps. The interface voltage for UART on the SIM8918x
series module is 1.8V. Taking a voltage level shift chip for voltage switching
if needed. Highly recommend pick TI’s TXS0104EPWR, and the reference design is
showing in the following Figures.
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SIM8918EA_SIM8918NA_User Manual
VREG_L15A_1P8
100pF
UART_CTS UART_RTS UART_TXD UART_RXD
VCCA OE
VCCB GND
A1
B1
A2
B2
A3
B3
A4
B4
TXS0104EPWR
VDD_3.3V
100pF
UART_CTS_3.3V UART_RTS_3.3V UART_TXD_3.3V UART_RXD_3.3V
Figure 17: UART Voltage Level Shift Reference Design The compatible reference design is showing below.
SIM8918x Module
VREG_L9A_1P8
VREG_L15A_1P8
4.7K 47K
4.7K
DTE
VDD
TXD
RXD
Figure 18: TX Voltage Level Shift Reference Design
SIM8918x Module
VREG_L15A_1P8
VREG_L15A_1P8
4.7K
DTE
VDD
4.7K RXD
47K TXD
Figure 19: RX Voltage Level Shift Reference Design
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3.7.3 SPI Interface
SIM8918EA_SIM8918NA_User Manual
SIM8918x series module supports up to 2 sets of the SPI interfaces. They only support the host mode, and the highest working frequency is 50MHz.
PIN Name UART0_CTS UART0_RTS UART0_TXD UART0_RXD GPIO_14 GPIO_15 GPIO_16 GPIO_17
PIN Num I/O Description
36
DI SPI1_MISO
37
DO SPI1_MOSI
34
DO SPI1_SCLK
35
DO SPI1_CS_N
118
DO SPI2_MISO
119
DO SPI2_MOSI
116
DI SPI2_SCLK
117
DO SPI2_CS_N
Notes SPI Data Input Signal SPI Data Output Signal SPI Clock Signal SPI Chip Select Signal SPI Data Input Signal SPI Data Output Signal SPI Clock Signal SPI Chip Select Signal
3.7.4 I2C Interface
SIM8918x series module supports up to 8 sets of the I2C interfaces, but only
open the following 6 sets of the I2C interfaces by default. They only support
the host mode, and the highest speed is 400Kbps. Highly recommend an external
2.2KR resister pulling up to the 1.8V power supply for I2C.
PIN Name
TP_I2C_SDA TP_I2C_SCL CAM0_I2C_SDA CAM0_I2C_SCL CAM1_I2C_SDA CAM1_I2C_SCL
SENSOR_I2C_SDA SENSOR_I2C_SCL SNSR_I3C_SDA SNSR_I3C_SCL
PIN Num 48 47 84 83 205 166 92 91 167 168
I/O
Pull Up Voltage
DI/DO DO DI/DO DO DI/DO DO DI/DO DO DI/DO DO
VREG_L15A_1P8 VREG_L15A_1P8 CAMERA IOVDD CAMERA IOVDD CAMERA IOVDD CAMERA IOVDD VREG_L15A_1P8 VREG_L15A_1P8 VREG_L15A_1P8 VREG_L15A_1P8
Description
TP I2C Data Signal TP I2C Clock Signal Camera I2C Data Camera I2C Clock Camera
I2C Data Camera I2C Clock Sensor I2C Data Sensor I2C Clock Sensor I3C Data
Sensor I3C Clock
Notes For TP For Cameras For Cameras For Sensors For Sensors
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3.7.5 I2S Interface
SIM8918EA_SIM8918NA_User Manual
SIM8918x series module supports 2 set of the I2S interfaces. It supports the input- mode, the output-mode, and the host-/device-mode.
PIN Name
GPIO_98 GPIO_99 GPIO_100 GPIO_101 GPIO_102 GPIO_103 GPIO_104 GPIO_105
PIN Num
265 105 264 239 104 103 101 102
Multiple I2S
LPI_MI2S0_CLK LPI_MI2S0_WS LPI_MI2S0_DATA0 LPI_MI2S0_DATA1 LPI_MI2S1_CLK
LPI_MI2S1_WS LPI_MI2S1_DATA0 LPI_MI2S1_DATA1
I/O Description
DO DO DI/DO DI/DO DO DO DI/DO DI/DO
I2S0 Clock I2S0 Word Select I2S0 Data0 I2S0 Data1 I2S1 Clock I2S1 Word Select I2S1 Data0 I2S1 Data1
3.8 SD Card Interface
SIM8918x series module supports SD 3.0/MMC cards with 4-Bit data interface or
SDIO 3.0 devices. The SD cards comply with the following protocols.
SD Specifications Part 1 Physical Layer Specification Version 3.00 Part A2 SD
Host Controller Standard Specification Version 3.00 Part E1 SDIO Specification
Version 3.00
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SD_LDO4 VREG_L15A_1P8
SD_DATA2 SD_DATA3
SD_CMD SD_VDD SD_CLK
SD_DATA0 SD_DATA1 SDCARD_DET_N
SIM8918x
Module
100K
10K_NC
0R
TVS closed to SD card
SIM8918EA_SIM8918NA_User Manual
51K_NC
4.7uF 33pF
SD CARD
1 DAT2 2 DAT3 3 CMD 4 VDD 5 CLK 6 VSS 7 DAT0 8 DAT1 9 DET_SW
10 GND 11 GND 12 GND 13 GND
Figure 20: SD Card Reference Design
3.9 TP Interface
SIM8918x series module provides an I2C interface, an interruption function pin, and a reset pin, connecting the touching panel to operate.
SIM8918x
Module
GND TP_RST_N TP_I2C_SCL TP_I2C_SDA TP_INT_N VREG_L17A_3P0
VREG_L15A_1P8 VREG_L15A_1P8
2.2 K
1uF
2.2K 10K
33pF
TP Interface
1 GND 2 TP_RST_N 3 TP_I2C_SCL 4 TP_I2C_SDA 5 TP_INT_N
6 TP_2V8
NOTE
Figure 21: TP Interface Reference Design
Highly recommend an external 2.2KR resister pulling up to the 1.8V power supply for TP I2C.
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SIM8918EA_SIM8918NA_User Manual
3.10 LCD Interface
SIM8918x series module’s video output interface meets the requirements of MIPI_DSI standard. It has a 4Lane DSI DPHY 1.2 interface with the speed up to 1.5Gbps. It supports screen display with the maximum resolution of 720*1680 (HD+) at 60Hz.
The PWM pin of the module could control the backlight brightness by software configuration.
The MIPI signal lines are high-speed signal lines. Highly recommend place a common mode inductor close to the LCM to avoiding EMI interference. Float the MIPI_Lane2 and the MIPI_Lane3 when the LCM only has 2-Lane differential pair data signals. Highly recommend adopting the module’s integrated reference circuits if the LCD interface has no bias voltage hardware design.
SIM8918x module
PWM VREG_L17A_3P0
GPIO LCD_TE LCD_RST_N
GND DSI_LN2_P
DSI_LN2_N
GND DSI_LN1_P DSI_LN1_N
GND DSI_CLK_P DSI_CLK_N
GND DSI_LN0_P DSI0_LN0_N
GND DSI_LN3_P DSI0_LN3_N
GND VREG_L15A_1P8
VDD_2V8
NC 100nF
0ohm
LCM
1 LCD_ID 2 DSI_TE 3 LCD_RST 4 GND 5 TDP2 6 TDN2 7 GND 8 TDP1 9 TDN1 10 GND 11
TCP 12 TCN 13 GND 14 TDP0 15 TDN0 16 GND17 TDP3 18 TDN3 19 GND 20 VIO18 21
AVDD28
22 GND 23 VLED_N 24 VLED_P 25 GND
VREG_L17A_3P0 PWM
VPH_PWR
LCD_AVDD LDO
EN
GND
1uF
10K
4.7uF
VPH_PWR
Backlight Drive IC
EN
GND
LED_N LED_P
10K 4.7uF
3P8S
Figure 22: LCD Interface & the Backlight Reference Design
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3.11 Camera Interface
SIM8918EA_SIM8918NA_User Manual
SIM8918x series module’s video input interface meets the requirements of
MIPI_CSI standard. 2 sets of 4-Lane CSI interfaces. Support 2 (4-Lane + 4-Lane
) cameras or Support 3 (4-Lane + 2-Lane + 1-Lane) cameras. Dual ISP support.
Support DPHY 1.2 with the speed up to 1.5Gbps/Lane or support CPHY 1.0 with
the speed up to 10.26Gbps(total). Two cameras: (13 MP + 13 MP or 25 MP) at 30
fps or (16 MP + 16 MP) at 24 fps, Only support one when the ISP is over 16M
pixels. Support 3 MCLKs, 3 RESET, 2 CCI I2C interfaces, and the GPIOs with
different functions.
3.11.1 CPHY & DPHY Interface of the Cameras
SIM8918x series module supports CPHY 1.0. The difference between the CPHY and
the DPHY are the different effective transmission mode. CPHY enables the data
transmission speed faster through the following technical improvements.
Firstly, CPHY converts the original 2-Lane group transmission of DPHY into
3-Lane group transmission. Then, CPHY does not need the Clock lane. The two
are compatible in pin definitions.
CSIx PHY1 of 2
Lane0 Lane1 Lane2 Lane3 Lane4
DPHY
MIPI_CSIx_DCLK_P MIPI_CSIx_DCLK_N MIPI_CSIx_DLN0_P MIPI_CSIx_DLN0_N
MIPI_CSIx_DLN1_P MIPI_CSIx_DLN1_N MIPI_CSIx_DLN2_P MIPI_CSIx_DLN2_N
MIPI_CSIx_DLN3_P MIPI_CSIx_DLN3_N
CPHY
NC MIPI_CSIx_TLN0_A MIPI_CSIx_TLN0_B MIPI_CSIx_TLN0_C MIPI_CSIx_TLN1_A
MIPI_CSIx_TLN1_B MIPI_CSIx_TLN1_C MIPI_CSIx_TLN2_A MIPI_CSIx_TLN2_B
MIPI_CSIx_TLN2_C
Figure 21 shows the application diagram of the CSI interface. It is a combination configuration, including 2 DPHY sensors, 2 CPHY sensors, a DPHY sensor, and a CPHY sensor.. The following applications are flexible.
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SIM8918EA_SIM8918NA_User Manual
Figure 23: CPHY & DPHY Interface Applications
3.11.2 DPHY Applications
SIM8918x
CSI0
Controls
PH Y
Clock LANE#0 LANE#1 LANE#2 LANE#3
CAM0_PWDN
CAM0_RST
CAM0_MCLK
CSI1
Controls
PH Y
CAM0_I2C_SDA
CAM0_I2C_SCL
Clock LANE#0 LANE#1 LANE#2 LANE#3
GPIO_47 CAM1_PWD_N
GPIO_46 CAM1_RST_N
GPIO_35 CAM3_MCLK
CAM1_I2C_SDA CAM1_I2C_SCL
VDD_2V8
Rear camera connector
ESD/EMC Filterin g
VDD_IOVDD 2.2 K
2.2 K
ESD/EMC Filterin g
ES D protector
AUX camera connector
eLDO DVDD_0
1.05V
VPH_PWR GPIO
eLDO AFVDD_0/1
2.8V
eLDO VDD_IOVDD
VPH_PWR GPIO
VDD_2V8
eLDO DVDD_1
1.05V
VPH_PWR GPIO
AFVDD_0/1 VDD_IOVDD
ES D protector
2.2 K
VDD_IOVDD
Place filters near connectors
2.2 K
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Figure 24: camera reference design
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SIM8918EA_SIM8918NA_User Manual
3.12 Audio Interface
SIM8918x series module supports following audio interfaces: Three analog audio
inputs
MIC1 differential pair interface for the master microphone MIC3 differential
pair interface for the denoising microphone MIC2 single ended interface for
the audio jack. Three-Channel analog audio output interface. Receiver Lineout
Stereo Headphone Two-Channel digital microphone interface. Support 4 digital
microphones.
3.12.1 Microphone Interface
ECM Type
A: Differential
MIC_BIAS1
SIM8918x Module
MIC1_P
MIC1_N
1.1KR
0R
Differential Pair Wiring & Stereo ground plane
0R
1.1KR
Place close to the microphone ends
10pF 10pF 10pF
33pF TVS 33pF 33pF TVS
ECM Type Microphone
Figure 25: ECM Type Microphone Reference Design(Differential)
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SIM8918EA_SIM8918NA_User Manual
B: Single-ended
MIC_BIAS1
SIM8918x Module 2.2KR
0R MIC1_P
MIC1_N
2.2KR NC_0R
Place close to the microphone ends
10pF
33pF TVS
ECM Type Microphone
0R
Figure 26: ECM Type Microphone Reference Design(single-ended)
MEMS Type
SIM8918x Module
MIC_BIAS1
MIC1_P MIC1_N
Differential Pair Wiring & Stereo ground plane
0R 0R 1.1 uF
Place close to the microphone ends
MEMS Type Microphone
VDD
OUT
10pF
33pF
GND
TVS 0R
Figure 27: MEMS Type Microphone Reference Design
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SIM8918x Module
MIC_BIAS1 DMIC1_CLK DMIC1_DATA
0.1uF
MIC_BIAS3 DMIC2_CLK DMIC2_DATA
0.1uF
SIM8918EA_SIM8918NA_User Manual
0R
0R 0R
0R
0R 0R
0R
0R 0R
0R
0R 0R
SEL BIAS CLK DATA
SEL BIAS CLK DATA
SEL BIAS CLK DATA
SEL BIAS CLK DATA
DMIC1 DMIC2 DMIC3 DMIC4
Figure 28: Digital Microphone Reference Design
3.12.2 Headphone Interface
HS_DET HPH_R HPH_L MIC2_P
HPH_REF
SIM8918x Module
Place close to the headset jack. Reserved magnetic beads or 0R resistor for debugging.
1000 OHM@100MHZ
1000 OHM@100MHZ
1000 OHM@100MHZ
1000 OHM@100MHZ 1000 OHM@100MHZ
Headphone Jack
0R
33pF 33pF 33pF
TVS
Figure 29: Headphone Reference Design
NOTE
1. Highly recommend the HS_DET and the HPH_L form a detection loop, and the
HPH_L has an internal 100KR resistor pulling down to the ground. The HS_DET is
connecting to the HPH_L presenting actively low when disconnecting the
headphone. The HS_DET presenting high when inserting the headphone.
2. Picking a bidirectional TVS on the network due to the negative voltage on
the HPH signal.
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Parameter
Output Power 1 Output Power 2 Output Voltage Loads Off Impedance
Testing Condition
Input = 0 dBFS, 32 load. Input = 0 dBFS, 16 load. Input = 0 dBFS
SIM8918EA_SIM8918NA_User Manual
Minimum Typical Maximum Unit
–
31.25 –
mW
–
62.5
mW
0.94
0.99
–
Vrms
–
16/32 –
–
20
–
3.12.3 Lineout Interface
SIM8918x series module output Class-AB differential LINEOUT_P/M. It can drive
external speaker amplifier for loudspeaker.
One differential class-AB amplifier 2Vrms ground reference differential output
Programmable 0 dB or 6 dB gain Supports differential 1000ohm (minimum) and
300pF(typical ) load.
Module
LINEOUT_P LINEOUT_N
Audio PA
2.2uF
2.2uF
Close to speaker
10pF 10pF 10pF
33pF TVS 33pF 33pF TVS
Figure 30: Speaker Reference Design
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SIM8918EA_SIM8918NA_User Manual
3.12.4 Handset Interface
SIM8918x
Module
10pF
EAR_P
10pF
EAR_N
10pF
Differential Pair Wiring & Stereo ground plane
33pF
33pF
33pF
Place close to the Handset
10pF 10pF 10pF
33pF TVS 33pF 33pF TVS
Figure 31: Handset Reference Design
Parameter
Output Power
Output Voltage Loads
Testing Condition
PA gain = 6 dB, 32 , THD+N 1% PA gain = 6 dB, 10.67 , THD+N 1% Input = 0 dBFS,
PA gain = 6 dB
Minimum
115
1.93 10.67
Typical
125
1.97 32
Maximum Unit
–
mW
–
mW
–
Vrms
–
3.13 USIM Card Interface
SIM8918x series module offers two UIM Cards interface, supporting dual card
dual standby. The UIM Cards interface also supports the 1.8V/2.95V dual
voltage and the hot plug detection.
NOTE
The standard software version supports dual cards, and the single card
function needs to be supported by the special software version.
The reference design for the UIM Card is showing in the Figure 30.
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SIM8918EA_SIM8918NA_User Manual
VREG_L15A_1P8 USIM_VDD
USIM_RST USIM_CLK USIM_DET USIM_DATA
Module
R1 100K/NC
UIM_DET Default Configuration is low active: UIM Card with DET Pin: Connect R1, R3, Disconnect R2
UIM Card no DET Pin: Disconnect R1, R3, Connect R2
22R 22R R3 0R/NC 22R
VCC RST CLK DET
GND VPP
I/O COM
R2 NC/0R
100nF
22pF
UIM Card
TVS
C<30pF
NOTE
Figure 32: UIM Card Interface Reference Design
1. The USIM_DATA Pin of the module pulls up to the USIM_VDD internally. Avoid
external pull up. 2. Place the TVS close to the USIM Card receptacle
interface. 3. Highly recommend the parasitic capacitance of the TVS on the
USIM_CLK should be less than
30pF. 4. Highly recommend the 22R resistor in series on the signal lines to
enhance the ESD protection. 5. Highly recommend reserved 22pF capacitor
pulling down to the ground on the USIM_DATA line
preventing the radio frequency interference.
3.14 ADC
SIM8918x series module offers one 16-Bit resolution ADC providing by the power management IC.
Parameter
Input power domain Resolution Analog input bandwidth Sample rate ADC
resolution (LSB) 1/1 channel end-to-end accuracy 1/1 channel end-to-end
accuracy with internal
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Description
Programmable
Minimum Typical
0
–
–
16
–
500
–
4.8
–
64.879
Calibrated data result -11
6
Maximum Unit
1.875
V
–
bits
–
kHz
–
MHz
–
uV
11
mV
Calibrated data result -12.5
7
12.5
mV
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pull-up 1/3 channel end-to-end accuracy 100 K pull-up 400 K pull-up 30 K pull-
up 1/1 channel AMUX input resistance 1/3 channel AMUX input resistance
NOTE
Calibrated data result -20
Trimmed value
99.5
Trimmed value
398
Trimmed value
29.7
10
1
SIM8918EA_SIM8918NA_User Manual
10
20
mV
100
100.5
k
100
402
k
30
30.3
k
–
–
M
–
–
M
ADC input power domain is 0~1.875V. Highly recommend connecting the ADC with a resistance voltage division circuit preventing the module from burning due to the high power supply voltage ADC detection.
3.15 Sensor Interface
SIM8918x series module communicates with sensors via I2C or I3C. It supports various sensors, including the hall sensor, the acceleration sensor, the geomagnetism sensor, the gyroscope sensor, the temperature sensor, the light sensor, and the pressure sensor.
PIN Name
PIN Num
I/O
SENSOR_I2C_SCL 92 DO
Description
Sensor I2C Clock Signal
SENSOR_I2C_SDA 91 DI/DO Sensor I2C Data Signal
GPIO_32 GPIO_35 GPIO_33 GPIO_34 GPIO_36 SNSR_I3C_SDA
SNSR_I3C_SCL
99 DI 107 DI 108 DI 109 DI 110 DI 167 DI
168 DI
Accelerate Interruption Pin PS/Light Sensor Interruption Pin Gyroscope Sensor
Interruption
Pin Magnetic Sensor Interruption Pin Hall Sensor Interruption Pin Sensor I3C
Clock Signal
Sensor I3C Clock Signal
Note
Highly recommend an external 2.2KR resistor pulling up to the VREG_L15A_1P8
ACCL_GYRO_INT1 ALPS_INT_N
ACCL_GYRO_INT2
MAG_INT_N HALL_INT Highly recommend an external 2.2KR resistor pulling up to
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VREG_L15A_1P8 111 PO VREG_L17A_3P0 129 PO
SIM8918EA_SIM8918NA_User Manual
Sensor I2C Pull Up VDD or VDDIO Power Supply AVDD3.0V Power Supply for sensor
the VREG_L15A_1P8
3.16 Motor Interface
VIB_DRV_P 0R
SIM8918x 1uF Module
Motor
Figure 33: Motor Interface Reference Design
3.17 LED Interface
SIM8918x series module supports charge indicate LED. Selecting a LED chip with
the common anode is needed. The maximum current on the channel is 5mA.
USB_VBUS
SIM8918x Module
CHG_LED 5mA
Figure 34: LEDs Interface Reference Design
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3.18 Flash LED Interface
SIM8918EA_SIM8918NA_User Manual
SIM8918x series module offers two channels of efficient FLASH_LED interface. The maximum current on each channel is 1A.
FLASH_LED
SIM8918x Module
100nF
Flash1A Torch200mA
Figure 35: Flash LED Interface Reference Design
3.19 Forced Emergency Download Interface
SIM8918x series module offers a FORCED_USB_BOOT Pin, which is an emergency
download interface. Pulling up the FORCED_USB_BOOT to the VREG_L15A_1P8 before
powering on enables the module to run into the emergency download mode, which
is also applying for the treatment when the product starts abnormally. Highly
recommend reserved the testing points for software upgrading and debugging.
SIM8908x Module
VREG_L15A_1P8 10K
FORCED_USB_BOOT
Figure 36: Emergency Download Interface Reference Design www.simcom.com
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SIM8918EA_SIM8918NA_User Manual
4 WIFI & BT
SIM8918x series module offers a common antenna interface combining the WIFI
and the BT function. The customers could connect the external WIFI and BT two
in one antenna via this interface. In the TDD mode, the WIFI and the BT
coexist.
4.1 WIFI Outline
SIM8918x series module supports the 2.4GHz and the 5GHz dual bands WLAN
wireless communication. It
supports multiple modes, including the 802.11a, the 802.11b, the 802.11g, the
802.11n, and the 802.11ac.
The highest rate is 433Mbps. The characteristics are as follows. Support the
2.4GHz and the 5GHz dual frequency bands, with the frequencies of
2402MHz~2482MHz and 5180MHz~5825MHz respectively. Support the Wake-on-WLAN.
Support the WAPI SMS4 hardware encryption. Support the AP mode and the STATION
mode. Support the WIFI Direct. Support the 2.4G MCS 0~8 for HT20 and VHT20.
Support the 2.4G MCS 0~7 for HT40 and VHT40. Support the 5G MCS 0~7 for HT20,
HT40 Support the 5G MCS 0~8 for VHT20. Support the 5G MCS 0~9 for VHT40 and
VHT80.
4.1.1 WIFI Feature
2.4GHz
Mode
802.11b 802.11b 802.11g 802.11g 802.11n HT20
Rate
CCK 1Mbps CCK 11Mbps 6Mbps 54Mbps MCS0
Bandwidth
–20M 20M 20M
Output Power1
15dBm±2dB 15dBm±2dB 15dBm±2dB 15dBm±2dB 15dBm±2dB
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5GHz
802.11n HT20 802.11n HT40 802.11n HT40 802.11a 802.11a 802.11n HT20 802.11n HT20 802.11n HT40 802.11n HT40 802.11ac VHT20 802.11ac VHT20 802.11ac VHT40 802.11ac VHT40 802.11ac VHT80 802.11ac VHT80
SIM8918EA_SIM8918NA_User Manual
MCS7
20M
MCS0
40M
MCS7
40M
OFDM 6Mbps
20M
OFDM 54Mbps 20M
MCS0
20M
MCS7
20M
MCS0
40M
MCS7
40M
MCS0
20M
MCS8
20M
MCS0
40M
MCS9
40M
MCS0
80M
MCS9
80M
15dBm±2dB 14dBm±2dB 14dBm±2dB 16dBm±2dB 8dBm±2dB 16dBm±2dB 10dBm±2dB 13dBm±2dB 8dBm±2dB 16dBm±2dB 8dBm±2dB 13dBm±2dB 8dBm±2dB 11dBm±2dB 8dBm±2dB
NOTE
The output power value is testing based on the standards of Mask and EVM.
2.4GHz 5GHz
Standard
802.11b 802.11b 802.11g 802.11g 802.11n HT20 802.11n HT20 802.11n HT40 802.11n
HT40 802.11a
Speed
CCK 1Mbps CCK 11Mbps 6Mbps 54Mbps MCS0 MCS7 MCS0 MCS7 OFDM 6Mbps
Bandwidth
–20M 20M 20M 20M 40M 40M 20M
Receiving Sensitivity
< -89dBm < -79dBm < -85dBm < -68dBm < -85dBm < -67dBm < -82dBm < -64dBm <
-85dBm
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802.11a 802.11n HT20 802.11n HT20 802.11n HT40 802.11n HT40 802.11ac VHT20 802.11ac VHT20 802.11ac VHT40 802.11ac VHT40 802.11ac VHT80 802.11ac VHT80
SIM8918EA_SIM8918NA_User Manual
OFDM 54Mbps 20M
MCS0
20M
MCS7
20M
MCS0
40M
MCS7
40M
MCS0
20M
MCS8
20M
MCS0
40M
MCS9
40M
MCS0
80M
MCS9
80M
< -68dBm < -85dBm < -67dBm < -82dBm < -64dBm < -85dBm < -62dBm < -82dBm < -57dBm < -79dBm < -54dBm
4.2 BT Outline
SIM8918x series module supports the BT5.0. It supports multiple modes, including the GFSK, the 8-DPSK, and the /4-DQPSK. The performance indexes are showing as follows.
BT RF Feature
BLE Emission Power: 7dBm±2dB
Emission Feature
Mode Emission Power
Receiving Feature
Mode
DH5 10dBm±2dB
DH5
Receiving Sensitivity
< -90dBm
2DH5 8dBm±2dB
2DH5 < -90dBm
3DH5 8dBm±2dB
3DH5 < -80dBm
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SIM8918EA_SIM8918NA_User Manual
5 GNSS
SIM8918x series module supports multiple positioning systems, including the
GPS, the GLONSS, and the BeiDou. LNA is a built-in component in the module to
effectively enhance the receiving sensitivity of GNSS.
5.1 GNSS Outline
Paramater
CN0 Static Drift Sensitivity
TTFF
Status
CN Value CEP-50 Tracking Recapturing Cold Booting Cold Booting Warm Booting
Hot Booting
Typical
44@-130dBm 5 -159 -156 -148
<35 <15 <5
Unit
dB/Hz m dBm dBm dBm s s s
5.2 GNSS RF & Antenna Design Guideline
The GNSS signal is a weak signal. If the antennas and the routings are not
designed properly, it is easy to interfere with the GNSS signal, resulting in
the decline of the GNSS receiving sensitivity, and even the GNSS positioning
time. To avoid the negative effects, the following principles shall be
observed in GNSS RF Design.
The isolation between the GNSS antenna and other antennas shall be at least
15dB. The GNSS RF signal lines and RF related components must be away from the
high-speed signals,
the power switch signals, and other clock signals. The GNSS antenna must be
away from the LCD screen, the camera, and other peripherals. The GNSS antenna
shall be placed close to the top of the equipment as far as possible. Refer to
chapter 6.4 for the GNSS antenna reference design.
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SIM8918EA_SIM8918NA_User Manual
6 Antenna Interface
SIM8918x series module has four antenna interfaces, including the MAIN
antenna, the DRX antenna, the GNSS antenna, and the WIFI/BT antenna. To ensure
the well RF performance of the products, the RF lines wiring through the
antenna pin to the antenna interfaces must meet the following requirements.
Ensure the RF lines are wiring with the 50 impedance. The RF lines must have a
complete stereo ground plane. The RF lines must away from the other
interference sources, including the high-speed signals, the
clock signals, the sound sensing devices, and the motor, etc. The RF lines
shall be as short as possible to avoid loss and interference.
6.1 MAIN Antenna & DRX Antenna
The MAIN antenna interface and the DRX antenna interface feature are showing as follows. MAIN Antenna & DRX Antenna Feature
PIN Name
ANT_MAIN ANT_DRX
PIN Num
87 131
I/O
AI/AO AI
Description
2G/3G/4G Main Antenna Interface 4G DRX Antenna Interface
Feature
50 Impedance 50 Impedance
6.1.1 Operating Frequency Band and Maximum power:
SIM8918x series module’s operating frequency bands are showing as follows.
Operating Frequency Band
Band
GSM850
Frequency
824-849MHz
GSM1900
1850-1910MHz
Maximum power Channel
33.0 dBm±0.5
29.0 dBm±0.5
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WCDMA B II WCDMA B V
1850-1910MHz
23.0dBm +1/-3
SIM8918EA_SIM8918NA_User Manual
824-849MHz
22.5dBm +1/-3
WCDMA B IV
1710-1755 MHz
22.5dBm +1/-3
LTE B2 LTE B4 LTE B5 LTE B7 LTE B12
1850-1910 MHz 1710-1755 MHz
23.0dBm ±0.5 23.0dBm
824-849MHz
23.0dBm ±0.5
2500-2570MHz
23.0dBm ±0.5
699-716MHz
23.0dBm ±1.0
LTE B13 LTE B17
777-787MHz
23.0dBm ±0.5
704-716MHz
23.0dBm ±1.0
LTE B25
1850-1915MHz
23.0dBm
LTE B26
814-849MHz
23.0dBm ±1.5
LTE B38 LTE B41 LTE B66
2570-2620MHz 2496-2690MHz 1710-1780MHz
23.0dBm ±0.5 23.0dBm ±0.5 23.0dBm ±0.5
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LTE B71
663-698MHz
GNSS(BDS/ Galileo/ 1559~1610 MHz GLONASS/ GPS):
23.0dBm ±0.5 /
SIM8918EA_SIM8918NA_User Manual /
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6.1.2 RF Reference Design
SIM8918EA_SIM8918NA_User Manual
SIM8918x series module’s MAIN antenna reference design is showing as follows.
GND ANT_TRX
GND
SIM8908x Module
RF Testing Interface
59
(Optional)
60
61
Antenna Matching Circuit
R1
C1
C2
MAIN Antenna
Figure 37: MAIN Antenna Reference Design
R1, C1, and C2 are the antenna matching components. All these three components
are adjustable to match the efficient and effective communication quality
based on the interface debugging result. Selecting R1 with 0R resistor by
default, and reserved C1 and C2 with disconnection by default. Highly
recommend reserved an RF testing interface to modify accurately and
conveniently. Considering the low cost, recommend ensure 50 impedance for the
RF lines and cancel the RF testing interface.
SIM8918x series module’s DRX antenna reference design is showing as follows.
GND ANT_DRX
GND
SIM8908x Module
RF Testing Interface
40
(Optional)
41
42
Antenna Matching Circuit
R1
C1
C2
DRX Antenna
Figure 38: DRX Antenna Reference Design R1, C1 and C2 are the antenna matching components. All these three components are adjustable to match the efficient and effective communication quality based on the interface debugging result. Selecting R1 with 0R resistor by default, and reserved C1 and C2 with disconnection by default. Highly recommend reserved an RF testing interface to modify accurately and conveniently. Considering the low cost, recommend ensure
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SIM8918EA_SIM8918NA_User Manual 50 impedance for the RF lines and cancel the RF testing interface.
6.2 WIFI/BT Antenna Interface
SIM8918x series module’s WIFI/BT antenna interface feature is showing as follows. WIFI/BT Antenna Feature
PIN Name
ANT_WIFI/BT
PIN Num
77
I/O
AI/AO
Description
WIFI/BT Antenna Interface
Feature
50 Impedance
SIM8918x series module’s WIFI/BT operating frequency bands are showing as follows. WIFI/BT Operating Frequency Band and Maximum power
Type
802.11a/b/g/n/ac
BT 5.0
Frequency Band
2412MHz~2462 MHz 5150 MHz ~5825 MHz 2402 MHz ~2480 MHz
Maximum Power
16.0dBm ±0.5
10.5dBm ±1
SIM8918x series module’s WIFI/BT antenna reference design is showing as follows.
GND ANT_WIFI/BT
GND
SIM8908x Module
WIFI/BT Antenna
RF Testing Interface
1
(Optional)
Antenna Matching Circuit
2
R1
3
C1
C2
Figure 39: WIFI/BT Antenna Reference Design
In Figure 37, R1, C1 and C2 are the antenna matching components. All these
three components are adjustable to match the efficient and effective
communication quality based on the interface debugging result. Selecting R1
with 0R resistor by default, and reserved C1 and C2 with disconnection by
default. Highly recommend reserved an RF testing interface to modify
accurately and conveniently. Considering the
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SIM8918EA_SIM8918NA_User Manual low cost, recommend ensure 50 impedance for the RF lines and cancel the RF testing interface.
6.3 GNSS Antenna Interface
SIM8918x series module’s GNSS antenna interface feature is showing as follows.
GNSS Antenna Feature
PIN Name
ANT_GNSS
PIN Num
I/O
Description
121 AI GNSS Antenna Interface
Feature
50 Impedance
SIM8918x series module’s GNSS operating frequency bands are showing as follows.
GNSS Operating Frequency Band
Type
GPS GLONASS BeiDou
Frequency Band
1575.42±1.023 1597.5~1605.8 1559.05 1563.14
Unit
MHz MHz MHz
6.3.1 GNSS Passive Antenna Reference Design
SIM8918x series module’s GNSS passive antenna reference design is showing as follows.
GND ANT_GNSS
GND
SIM8908x Module
RF Testing Interface
48
(Optional)
49
50
Antenna Matching Circuit
R1
C1
C2
GNSS Passive Antenna
Figure 40: GNSS Passive Antenna Reference Design
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SIM8918EA_SIM8918NA_User Manual
R1, C1 and C2 are the antenna matching components. All these three components
are adjustable to match the efficient and effective communication quality
based on the interface debugging result. Selecting R1 with 0R resistor by
default, and reserved C1 and C2 with disconnection by default. Highly
recommend reserved an RF testing interface to modify accurately and
conveniently. Considering the low cost, recommend ensure 50 impedance for the
RF lines and cancel the RF testing interface.
6.3.2 GNSS Active Antenna Reference Design
SIM8918x series module’s GNSS active antenna reference design is showing as
follows.
GND ANT_GNSS
GND
RF Testing Interface (Optional)
48
49
SIM8908x Module
Attenuator
GNSS Active Antenna
C1
47nH 10ohm
VDD
Figure 41: GNSS Active Antenna Reference Design
In Figure 39, highly recommend reserved the attenuator, and the attenuation value is determined by the gain of the external active antenna. Generally speaking, the attenuation value and antenna gain of the attenuator meet the following formula.
Antenna Gain = Attenuation value + Cable Losses
VDD is using to for the active antenna’s power supply. The voltage value is determined by the antenna’s feature. C1 is using to isolate straight, and the default value is 33pF. Highly recommend reserved an RF testing interface to modify accurately and conveniently. Considering the low cost, recommend ensure 50 impedance for the RF lines and cancel the RF testing interface.
6.4 RF Signals PCB Wiring Guideline
Highly recommend the characteristic impedance of all RF signal lines shall be controlled at 50 when the
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SIM8918EA_SIM8918NA_User Manual
customers route their PCB. Generally, the impedance of RF signal lines is
determined by the dielectric constant (ER), the wiring width (W), the ground
clearance (S), the height of the reference ground plane (H), and other
factors.
RF routing characteristic impedance control usually adopts the microstrip-slot
line and the coplanar waveguide-slot line. The reference designs of 50
impedance are showing as follows.
Micro strip-slot Line Structure
Layer1 Prepreg
Layer2
2W
2W
H
W
Figure 42: Two Layers PCB Microstrip-slot Line Structure
Two Layers PCB Microstrip-slot Line Structure Impedance Control Feature
Thickness Er
1mm
4.2
1.6mm
4.2
Signal Thickness
0.035mm 0.035mm
Signal Layer Layer1 Layer1
Reference Layer Impedance Width
Layer2 Layer2
50 ohm 50 ohm
1.7mm67 mil 3mm118 mil
Coplanar Waveguide-slot Line
Layer1 Prepreg
Layer2
S
S
H
W
Figure 43: Two Layers PCB Coplanar Waveguide-slot Line Structure
Two Layers PCB Coplanar Waveguide-slot Line Structure Impedance Control Feature
Thickness Er
1mm
4.2
1.6mm
4.2
Signal Thickness Signal
0.035mm 0.035mm
Layer1 Layer1
Reference Impedance
Layer2 Layer2
50 ohm 50 ohm
S
W
0.65mm25.6 mil 0.2mm7.8 mil 0.65mm25.6 mil 0.15mm5.9 mil
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SIM8918EA_SIM8918NA_User Manual
Layer1 Prepreg
Layer2 Prepreg Layer3 Prepreg
Layer4
SW S H
2W W 2W
Figure 44: Four Layers PCB Coplanar Waveguide-slot Line Structure (Reference Layer Three)
Layer1 Prepreg
Layer2 Prepreg Layer3 Prepreg
Layer4
SW S H
2W
W
2W
Figure 45: Four Layers PCB Coplanar Waveguide-slot Line Structure (Reference Layer Four)
To ensure the well RF performance of the products, the RF lines wiring through
the antenna pin to the antenna interfaces must meet the following
requirements.
Ensure the RF lines are wiring with the 50 impedance. The RF lines must have a
complete stereo ground plane. Add more ground holes around the RF signal lines
and the reference ground to enhance the RF
performance. The RF lines must away from the other interference sources,
including the high-speed signals, the
clock signals, the sound sensing devices, and the motor, etc. The RF lines
shall be as short as possible to avoid loss and interference. The GND pin
adjacent to the RF interface pin of the module is not subject to thermal pad
treatment
and is in full contact with the ground. Avoid wiring crossing the whole PCB.
Avoid the right-angle routing. Highly recommend wiring with a
circular arc or a 135-degree routing. Be aware of the distance between the
components and the lower PCB ground, especially for the RF
connecting device package. Digging out the GND copper foil on the surface of
the PCB below the connector if necessary. The distance between the ground hole
and the signal line shall be at least 2 times the line
width(2*W).
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SIM8918EA_SIM8918NA_User Manual
6.5 Antenna Installation
6.5.1 GNSS Passive Antenna Reference Design
SIM8918x series module’s antenna interface installation requirements are showing as follows. Antenna Installation Requirements
Antenna
GSM/WCDMA/LTE
Wi-Fi/BT
Paramaters’ Requirements
Standing wave ratio: 2
Gain (dBi):
GSM/GPRS/EDGE 850: 0.64 dBi GSM/GPRS/EDGE 1900: 2.12 dBi WCDMA/HSDPA/HSUPA
Band II: 2.12 dBi WCDMA/HSDPA/HSUPA Band IV: 2.95 dBi WCDMA/HSDPA/HSUPA Band
V: 0.64 dBi LTE FDD Band 2: 2.12 dBi LTE FDD Band 4: 2.95 dBi LTE FDD Band 5:
0.64 dBi LTE FDD Band 7: 2.90 dBi LTE FDD Band 12: 1.57 dBi LTE FDD Band 13:
2.23 dBi LTE FDD Band 17: 1.57 dBi LTE FDD Band 25: 1.87 dBi LTE FDD Band 26:
1.40 dBi LTE FDD Band 66: 2.95 dBi LTE FDD Band 71: 0.22 dBi LTE TDD Band 38:
1.64 dBi LTE TDD Band 41: 2.90 dBi Maximum Input Power (W): 50
Input Impedance (): 50
Polarization Type: Vertical
Insertion Loss: < 1dB
(GSM850/GSM1900, WCDMA B2/B4/B5,
LSTEtanBd2in/Bg4w/Ba5ve/Br7a/tBio1:2/B213/B38/B41)
(2.4G) Gain (dBi): 4.01
(5G) Gain (dBi): 4.32
Maximum Input Power (W): 50
Input Impedance (): 50
Polarization Type: Vertical
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GNSS
SIM8918EA_SIM8918NA_User Manual Frequency Range: 1559 – 1607MHz Polarization Type: Right-Handed Circular or Linear Polarization Standing wave ratio: < 2 (Typical) Passive Antenna Gain: > 0dBi Active Antenna Noise Coefficient: < 1.5dB (Typical) Active Antenna Gain: > -2dBi Active Antenna Integrated LNA Gain: <17dB (Typical) Active Antenna Total Gain: <17dBi (Typical)
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6.6 Safety Caution
SIM8918EA_SIM8918NA_User Manual
Safety Caution Marks
Requirements
When in a hospital or other health care facility, observe the restrictions
about the use of mobiles. Switch the cellular terminal or mobile off, medical
equipment may be sensitive and not operate normally due to RF energy
interference.
Switch off the cellular terminal or mobile before boarding an aircraft. Make
sure it is switched off. The operation of wireless appliances in an aircraft
is forbidden to prevent interference with communication systems. Forgetting to
think much of these instructions may impact the flight safety, or offend local
legal action, or both. Do not operate the cellular terminal or mobile in the
presence of flammable gases or fumes. Switch off the cellular terminal when
you are near petrol stations, fuel depots, chemical plants or where blasting
operations are in progress. Operation of any electrical equipment in
potentially explosive atmospheres can constitute a safety hazard. Your
cellular terminal or mobile receives and transmits radio frequency energy
while switched on. RF interference can occur if it is used close to TV sets,
radios, computers or other electric equipment. Road safety comes first! Do not
use a hand-held cellular terminal or mobile when driving a vehicle, unless it
is securely mounted in a holder for hands free operation. Before making a call
with a hand-held terminal or mobile, park the vehicle.
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SIM8918EA_SIM8918NA_User Manual
GSM cellular terminals or mobiles operate over radio frequency signals and
cellular networks and cannot be guaranteed to connect in all conditions,
especially with a mobile fee or an invalid SIM card. While you are in this
condition and need emergent help, please remember to use emergency calls. In
order to make or receive calls, the cellular terminal or mobile must be
switched on and in a service area with adequate cellular signal strength. Some
networks do not allow for emergency call if certain network services or phone
features are in use (e.g. lock functions, fixed dialing etc.). You may have to
deactivate those features before you can make an emergency call. Also, some
networks require that a valid SIM card be properly inserted in the cellular
terminal or mobile.
FCC Statement This device complies with part 15 of the FCC rules. Operation is
subject to the following two conditions: (1) this devi ce may not cause
harmful interference, and (2) this device must accept any interference
received, including inte rference that may cause undesired operation. Changes
or modifications not expressly approved by the party responsible for
compliance could void the user’s aut hority to operate the equipment. NOTE:
This equipment has been tested and found to comply with the limits for a Class
B digital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates uses and can radiate radio
frequency energy and, if not installe d and used in accordance with the
instructions, may cause harmful interference to radio communications. However
, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause har mful interference to radio or
television reception, which can be determined by turning the equipment off and
on, t he user is encouraged to try to correct the interference by one or more
of the following measures: · Reorient or relocate the receiving antenna. ·
Increase the separation between the equipment and receiver. · Connect the
equipment into an outlet on a circuit different from that to which the
receiver is connected. · Consult the dealer or an experienced radio/TV
technician for help. Important Note: Radiation Exposure Statement This
equipment complies with FCC radiation exposure limits set forth for an
uncontrolled environment. This equipment should be installed and operated with
minimum distance 20cm between the radiator and your body. This transmitter
must not be co-located or operating in conjunction with any other antenna or
transmitter. Country Code selection feature to be disabled for products
marketed to the US/Canada. This device is intended only for OEM integrators
under the following conditions: 1. The antenna must be installed such that 20
cm is maintained between the antenna and users, and 2. The transmitter module
may not be co-located with any other transmitter or antenna, 3. For all
products market in US, OEM has to limit the operation channels in CH1 to CH11
for 2.4G band by
supplied firmware programming tool. OEM shall not supply any tool or info to
the end-user regarding to Regulatory Domain change. (if modular only test
Channel 1-11) As long as the three conditions above are met, further
transmitter testing will not be required. However, the OEM integrator is still
responsible for testing their end-product for any additional compliance
requirements required with this module installed.
Important Note: In the event that these conditions cannot be met (for example
certain laptop configurations or co-location with another transmitter), then
the FCC authorization is no longer considered valid and the FCC ID cannot be
used on the final product. In these circumstances, the OEM integrator will be
responsible for re-evaluating the end product (including the transmitter) and
obtaining a separate FCC authorization.
SIM8918EA_SIM8918NA_User Manual
End Product Labeling The final end product must be labeled in a visible area
with the following” Contains FCC ID: 2AJYU-8XRA002 “.
Manual Information to the End User The OEM integrator has to be aware not to
provide information to the end user regarding how to install or remove this RF
module in the user’s manual of the end product which integrates this module.
The end user manual shall include all required regulatory information/warning
as show in this manual.
ISED Statement – English: This device complies with Industry Canada license-
exempt RSS standard(s). Operation is subject to the following two conditions:
(1) This device may not cause interference, and (2) This device must accept
any interference, including interference that may cause undesired operation of
the device. The digital apparatus complies with Canadian CAN ICES-3
(B)/NMB-3(B). – French: Le présentappareilestconforme aux CNR d’Industrie
Canada applicables aux appareils radio exempts de licence.
L’exploitationestautorisée aux deux conditions suivantes: (1) l’appareil ne
doit pas produi re de brouillage, et (2) l’utilisateur de l’appareildoit
accepter tout brouillageradioélectriquesubi, mêmesi le brouillag eest
susceptible d’encompromettre le fonctionnement. This radio transmitter (ISED
certification number: 23761-8XRA002) has been approved by Industry Canada to
operate with the antenna types listed with the maximum permissible gain
indicated. Antenna types not included in this list, having a gain greater than
the maximum gain indicated for that type, are strictly prohibited for use with
this device. Le présent émetteur radio (ISED certification number:
23761-8XRA002) a été approuvé par Industrie Canada pour fonctionner avec les
types d’antenne énumérés ci-dessous et ayant un gain admissible maximal. Les
types d’antenne non inclus dans cette liste, et dont le gain est supérieur au
gain maximal indiqué, sont strictement interdits pour l’exploitation de
l’émetteur.
Antenna Type: External Antenna Antenna Gain: WCDMA/HSDPA/HSUPA Band II: 2.12
dBi WCDMA/HSDPA/HSUPA Band IV: 2.95 dBi WCDMA/HSDPA/HSUPA Band V: 0.64 dBi LTE
FDD Band 2: 2.12 dBi LTE FDD Band 4: 2.95 dBi LTE FDD Band 5: 0.64 dBi LTE FDD
Band 7: 2.90 dBi LTE FDD Band 12: 1.57 dBi LTE FDD Band 13: 2.23 dBi LTE FDD
Band 17: 1.57 dBi LTE FDD Band 25: 1.87 dBi LTE FDD Band 26: 1.40 dBi LTE TDD
Band 41: 2.90 dBi LTE FDD Band 66: 2.95 dBi LTE FDD Band 71: 0.22 dBi WLAN
2.4G&Bluetooth: 4.53dBi WLAN 5G: 4.66dBi
Radiation Exposure Statement This equipment complies with Canada radiation
exposure limits set forth for an uncontrolled environment. This equipment
should be installed and operated with minimum distance 20cm between the
radiator & your body.
SIM8918EA_SIM8918NA_User Manual
Déclaration d’exposition aux radiations Cet équipement est conforme Canada
limites d’exposition aux radiations dans un environnement non contrôlé. Cet
équipement doit être installé et utilisé à distance minimum de 20cm entre le
radiateur et votre corps.
This device is intended only for OEM integrators under the following
condition: The transmitter module may not be co-located with any other
transmitter or antenna. As long as the condition above is met, further
transmitter test will not be required. However, the OEM integrator is still
responsible for testing their end-product for any additional compliance
requirements required with this module installed. Cet appareil est conçu
uniquement pour les intégrateurs OEM dans les conditions suivantes: Le module
émetteur peut ne pas être coïmplanté avec un autre émetteur ou antenne. Tant
que les 1 condition ci-dessus sont remplies, des essais supplémentaires sur
l’émetteur ne seront pas nécessaires. Toutefois, l’intégrateur OEM est
toujours responsable des essais sur son produit final pour toutes exigences de
conformité supplémentaires requis pour ce module installé.
Important Note: In the event that these conditions cannot be met (for example
certain laptop configurations or co-location with another transmitter), then
the Canada authorization is no longer considered valid and the IC cannot be
used on the final product. In these circumstances, the OEM integrator will be
responsible for re-evaluating the end product (including the transmitter) and
obtaining a separate Canada authorization. Note Importante: Dans le cas où ces
conditions ne peuvent être satisfaites (par exemple pour certaines
configurations d’ordinateur portable ou de certaines co-localisation avec un
autre émetteur), l’autorisation du Canada n’est plus considéré comme valide et
l’ IC ne peut pas être utilisé sur le produit final. Dans ces circonstances,
l’intégrateur OEM sera chargé de réévaluer le produit final (y compris
l’émetteur) et l’obtention d’une autorisation distincte au Canada. End Product
Labeling
The final end product must be labeled in a visible area with the following:
Contains IC: 23761-8XRA002. Plaque signalétique du produit final Le produit
final doit être étiqueté dans un endroit visible avec l’inscription suivante:
Contient des IC: 237618XRA002
Manual Information to the End User The OEM integrator has to be aware not to
provide information to the end user regarding how to install or remove this RF
module in the user’s manual of the end product which integrates this module.
The end user manual shall include all required regulatory information/warning
as show in this manual. Manuel d’information à l’utilisateur final
L’intégrateur OEM doit être conscient de ne pas fournir des informations à
l’utilisateur final quant à la façon d’installer ou de supprimer ce module RF
dans le manuel de l’utilisateur du produit final qui intègre ce module. Le
manuel de l’utilisateur final doit inclure toutes les informations
réglementaires requises et avertissements comme indiqué dans ce manuel.
Caution: (i) The device for operation in the band 51505250 MHz is only for
indoor use to reduce the potential for
harmful interference to co-channel mobile satellite systems; (ii) (ii) For
devices with detachable antenna(s), the maximum antenna gain permitted for
devices in the bands
5250-5350 MHz and 5470-5725 MHz shall be such that the equipment still
complies with the EIRP limit; (iii) (iii) For devices with detachable
antenna(s), the maximum antenna gain permitted for devices in the band
5725-5850 MHz shall be such that the equipment still complies with the EIRP
limits specified for point-topoint and non-point-to-point operation as
appropriate; and Operations in the 5.25-5.35GHz band are restricted to indoor
usage only. In addition, for the frequency band 5600-5650MHz of Canadian
weather radar work, the equipment is limited by software to limit the work of
this frequency band, and the user can not independently change.
SIM8918EA_SIM8918NA_User Manual
Avertissement: (i) les dispositifs fonctionnant dans la bande de 5150 à
5250MHz sont réservés uniquement pour une
utilisation à l’intérieur afin de réduire les risques de brouillage
préjudiciable aux systèmes de satellites mobiles utilisant les mêmes canaux;
(ii) pour les dispositifs munis d’antennes amovibles, le gain maximal
d’antenne permis pour les dispositifs utilisant les bandes de 5250 à 5350MHz
et de 5470 à 5725 MHz doit être conforme à la limite de la p.i.r.e; (iii) pour
les dispositifs munis d’antennes amovibles, le gain maximal d’antenne permis
(pour les dispositifs utilisant la bande de 5725 à 5850 MHz) doit être
conforme à la limite de la p.i.r.e. spécifiée pour l’exploitation point à
point et l’exploitation non point à point, selon le cas; Les opérations dans
la bande de 5.25-5.35GHz sont limités à un usage intérieur seulement.
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54 / 53
References
- Welcome to Mosaic Communications Corporation!
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- SIMCom Wireless Solutions - Wireless Modules and Solutions Supplier
- SIMCom Wireless Solutions - Wireless Modules and Solutions Supplier
- Smart Modules and Smart Modules Wireless Solutions | SIMCom Wireless Solutions Co.,Ltd.
- Smart Modules and Smart Modules Wireless Solutions | SIMCom Wireless Solutions Co.,Ltd.