Nexis WIFI Module User Manual

Specifications of
iFi Nexis WIFI
Version： V0.3
Effective date: 2023-05-31
User Manual

Version update

Product Introduction

Introduction
iFi Nexis wireless WIFI module is a new WIFI SOC SV32WB06 chip design. It also integrated on-chip MCU, core frequency is 480MHz, built-in 512KB SRAM & 128K ROM. Work on 2.4GHz frequency band, support Wi-Fi standard 802.11b/g/n; supply voltage is 3.3V/5V.

Product Features

2.1 WLAN Features

• Andes Technology D10F processor (Core freq: 480MHz)，128K ROM & 512KB SRAM for instructions and data, optional plug-in 32/64/128Mbit SPI Flash；
• Recommended working voltage:3.3V-5.25V；IO voltage：3.3V；
• Interface:3UART,8ADC,8PWM,2I2C,1SDIO,27GPIO reusable；
• Support Wi-Fi standard: 802.11 b/g/n；
• Support: H20/H40；
• Support: STA/AP dual mode
• Support WEP、WPA/WPA2 safe mode
• Support wireless upgrade (OTA）；
• Support PCB onboard antenna ,high compatibility & high performance；

Application field

• Smart Home/Home Appliances
• Smart socket/smart light
• Intelligent Building
• Industrial wireless control
• Wireless webcam

Functional block diagram

Size of package and definition of connection

5.1 Dimensions
Size (mm)：18mm25.5mm3.2mm，PCB thickness: 0.8mm, size of deviation less than 0.1mm

5.2 Recommended package

Pin#| Name| ALT1| ALT2| ALT3| ALT4| ALT5| ALT6| ALT7
---|---|---|---|---|---|---|---|---
1| GND|  |  |  |  |  |  |
2| VBAT|  |  |  |  |  |  |
3| LDO_EN|  |  |  |  |  |  |
4| GPIO02| GPIO02| ADC2|  |  | SPISLV0 SCLK| SPIMASO SCLK|
5| GPIO04| GPIO04| I2C0 SCL|  |  |  |  |
6| GPIO05| GPIO05|  |  |  | SPISLV0 CSN| SPIMASO CSN|
7| GPIO06| GPIO06| I2C0 SDA| PSRAM SPI CSN|  |  |  |
8| GPIO13| GPIO13|  |  |  |  |  |
9| GPIO14| GPIO14|  |  | PDMTXO DOUT0| PDMRX0 CLK| I250 WS|
10| GPIO15| GPIO15|  |  | PDMTXO DOUT1| PDMRX0 DIN| I2S0 SDI|
11| GPIO16| GPIO16|  |  |  | PDMRX1 CLK| I2S0 SDO|
12| GPIO23| GPIO23|  | UART2 TXD| I2C1 SCL|  |  |
13| GPIO20| GPIO20| SD CLK| | DATASPISLAVE SCLK| SPISLV1 MISO| SPIMAS1 MISO|
---|---|---|---|---|---|---|---|---
14| GPIO17| GPIO17| SD DATA2| UART2 NCTS|  | PDMRX1 DIN| I2S0 SCK|
15| GND|  |  |  |  |  |  |
16| GPIO18| GPIO18| SD DATA3|  | DATASPISLAVE CSN| SPISLV1 CSN| SPIMAS1 CSN|
17| GPIO25| GPIO25| WIFI TX| RTC RC32K EXT|  | UART2 TXD|  |
18| GPIO26| GPIO26| BT IN PROCESS|  | 12S0 MCLK| UART2 RXD| SPIMAS2 CSN|
19| GPIO28| GPIO28|  |  |  |  | I2S0 MCLK|
20| GND|  |  |  |  |  |  |
21| GND|  |  |  |  |  |  |
22| GND|  |  |  |  |  |  |
23| GPIO19| GPIO19| SD CMD| | DATASPISLAVE MOSI| SPISLV1 MOSI| SPIMAS1 MOSI|
24| GPIO21| GPIO21| SD DATAO| | DATASPISLAVE MISO| SPISLV1 SCLK| SPIMAS1_SCLK|
25| GPIO24| GPIO24|  | UART2 RXD| 12C1 SDA|  |  |
26| GPIO22| GPIO22| SD DATA1| UART2 NRTS|  | I2S0 MCLK|  |
27| RXD2| GPIO36| ADC6| 12C0 SCL| UART2 RXD| SPIMAS2 CSN| BT IN PROCESS| BT SW
28| TXD2| GPIO37| ADC7| 12C0 SDA| UART2 TXD| | BT PTI3| WIFI TX SW
29| GPIO27| GPIO27|  | UART1 NCTS| PDMRXO CLK|  | 12S1 Ws|
30| GPIO29| GPIO29| ADC3| UART1 NRTS| PDMRXO DIN| UART1 RXD| 12S1 SDI|
31| GPIO30| GPIO30| ADC4| UART1 RXD| PDMRX1 CLK| PDMTXO DOUTO| 12S1 SDO|
32| GPIO31| GPIO31| ADC5| UART1 TXD| PDMRXI DIN| PDMTXO DOUT1| 12S1 SCK|
33| GPIO32| GPIO32| BT PTI3|  | SPIMAS2 SCLK|  |  |
34| RXD0| GPIO00| ADC0| BT SW| UART0 RXD| SPISLV0_MOS| SPIMASO MOSI|
35| TXD0| GPIO01| ADC1| WIF_TX SW| UART0 TXD| SPISLV0 MISO| SPIMASO MISO|
36| GPIO33| GPIO33|  |  | SPIMAS2 MOSI| UART1 TXD| WIFTX|
37| GPIO35| GPIO35|  |  | SPIMAS2 MISO|  |  |
38| GND|  |  |  |  |  |  |

Note:

1. LDO_EN pin can be turned on normally when it is suspended in the air pull down to reset， don’t pull up otherwise it may not turn on
2. GPIO13 internal pull down normal startup when suspended connect 3.3V then enter the burning mode other features are not recommended。
3. SPI Flash interface SPI_HOLD、SPI WP、SPI_CS、SPI_CLK, SPI, SDO, SPI, SDI, that GPIO07~12， provide flash use only Burning interface, Not recommended for other functions。
4. Burning interface RXD0/TXD0。
5. All GPIO ports can be used as PWM but only choose up to 8。

Audio input and output

6.1 MIC input
The module supports digital mic input, the pins can be selected that according to the actual application.

The reference circuit is as follows:

The module is based on 12bit ADC interface, support analog MIC input, Applications that require no changes for audio input, can use this scheme, and the reference circuit is as follows：

6.2 Audio output
The module chip supports PDM audio output that can be ellipsis DAC code, Directly connected to PA amplifier output through RC filter circuit. The pin can be selected that according to the actual application, and it supports two- channel stereo output

Taking mono as an example, the reference circuit is as follows:

The capacitance of the RC filter circuit can be adjusted that according to the actual situation. If the volume is too low, the ground capacitance can be reduced.

Electrical parameters

7.1 Parameters

7.2 Power consumption

8. RF performance
This specification is based on conduction test results。environment（0℃，+ 25℃，+ 40℃）voltage 3.3V。
The channel 12, 13 only available in European and Japanese countries.
IEEE802.11b

1. Power Levels

1. 17dBm Target (For Each antenna port) @11Mbps	22.491	17	23.899	dBm

   2. Spectrum Mask @ Target Power

2. fc +/-11MHz to +/-22MHz| –| –| -30| dBr
3. at fc +/-20MHz| –| –| -50| dBr
   3. Constellation Error(EVM) @ Target Power
4. 1Mbps| –| -30| -16.5| dB
5. 2Mbps| –| –| -16.5| dB
6. 5.5Mbps| –| –| -16.5| dB
7. 11Mbps| –| -28| -16.5| dB
   4. Frequency Error
8. IEEE802.11b| -10| –| 10| ppm
   RX Characteristics| Min| Typ| Max| Unit Remark
   5. Minimum Input Level Sensitivity(each chain)
9. 1Mbps (FER ≦8%)| –| -95| -83| dBm
10. 2Mbps (FER ≦8%)| –| –| -80| dBm
11. 5.5Mbps (FER ≦8%)| –| –| -77| dBm
12. 11Mbps (FER ≦8%)| –| -86| -76| dBm
    6. Maximum Input Level (PER ≦10%)
13. IEEE802.11b| -10| 10| –| dBm

IEEE802.11g

1. Power Levels

1. 15dBm Target (For Each antenna port @ 11g/54M| 20.434| 15| 21.790| dBm
   2. Spectrum Mask @ Target Power
2. at fc +/-11MHz| –| –| -20| dBr
3. at fc +/-20MHz| –| –| -28| dBr
4. at fc > +/-30MHz| –| –| -40| dBr
   3. Constellation Error(EVM) @ Target Power|  |  |  |
5. 6Mbps| –| -28| -5| dB
6. 9Mbps| –| –| -8| dB
7. 12Mbps| –| –| -10| dB
8. 18Mbps| –| –| -13| dB
9. 18Mbps| –| –| -13| dB

10. 24Mbps	–	-30	-16	dB

11. 36Mbps| –| –| -19| dB
12. 48Mbps| –| –| -22| dB
13. 54Mbps| –| -29| -27| dB
    4. Frequency Error
14. IEEE802.11g| -10| –| 10| ppm
    RX Characteristics| Min| Typ| Max| Unit Remark
    5. Minimum Input Level Sensitivity(each chain)
15. 6Mbps (PER ≦10%)| –| -88| -82| dBm
16. 9Mbps (PER ≦10%)| –| –| -80| dBm
17. 12Mbps (PER ≦10%)| –| –| -79| dBm
18. 18Mbps (PER ≦10%)| –| –| -77| dBm
19. 24Mbps (PER ≦10%)| –| –| -75| dBm
20. 36Mbps (PER ≦10%)| –| –| -72| dBm
21. 48Mbps (PER ≦10%)| –| –| -68| dBm
22. 54Mbps (PER ≦10%)| –| -72| -65| dBm
    6. Maximum Input Level (PER ≦10%)
23. IEEE802.11g| -20| -4| –| dBm

IEEE802.11n 20

1. Power Levels

1. 14dBm Target (For Each antenna port) @ 2.4G/ MCS7| 20.372| 15| 21.611| dBm
   2. Spectrum Mask @ Target Power
2. at fc +/-11MHz| –| –| -20| dBr
3. at fc +/-20MHz| –| –| -28| dBr
4. at fc > +/-30MHz| –| –| -45| dBr
   3. Constellation Error(EVM) @ Target Power
5. MCS0| –| -28| -5| dB
6. MCS1| –| –| -10| dB
7. MCS2| –| –| -13| dB
8. MCS3| –| -29| -16| dB
9. MCS4| –| –| -19| dB
10. MCS5| –| –| -22| dB
11. MCS6| –| –| -25| dB

12. MCS7	–	-29	-27	dB

    4. Frequency Error

13. IEEE802.11n 20| -10| –| 10| ppm
    RX Characteristics| Min| Typ| Max| Unit Remark
    5. Minimum Input Level Sensitivity(each chain)
14. MCS0 (PER ≦10%)| –| -89| -82| dBm
15. MCS1 (PER ≦10%)| –| –| -80| dBm
16. MCS2 (PER ≦10%)| –| –| -79| dBm
17. MCS3 (PER ≦10%)| –| –| -77| dBm
18. MCS4 (PER ≦10%)| –| –| -75| dBm
19. MCS5 (PER ≦10%)| –| –| -72| dBm
20. MCS6 (PER ≦10%)| –| –| -68| dBm
21. MCS7 (PER ≦10%)| –| -70| -64| dBm
    6. Maximum Input Level (PER ≦10%)
22. IEEE802.11n 20| -20| -4| –| dBm

Antenna Design Considerations

The module is an onboard antenna, and the following precautions need to be observed:

• WIFI module adopts PCB onboard antenna, To ensuring Optimum Antenna Performance, keep 15mm between the metal parts and the antenna. Do not cover copper on the board in the antenna area.
• Make sure that there is no substrate medium directly below or directly above the printed antenna; ensure that the surrounding of the printed antenna is away from the metal copper skin, so as to ensure the radiation effect of the antenna to the greatest extent.

Production recommended furnace temperature curve

When perform SMT placement, please according to the reflow soldering curve, peak temperature 245℃, the reflow soldering temperature curve is shown in the figure below:

Method of Packaging and shipping

The assembled module must be placed by the SMT machine, when unpacking and burning the firmware, it must finish the assembled for the PCBA within 24 hours. Those remaining shall Re-vacuum the package, and bake the module before patching. Baking time 2 hours The rest should be re-vacuum-packed, re- assembled those rest of module, proceed to bake. Baking time 2 hours.
11.1 The storage conditions of the module are as follows:
Moisture-proof bags must be stored in an environment with a temperature <30°C and a humidity <70%RH.
Products in dry packaging have a shelf life of 6 months from the date the package is sealed.
11.2 Package Size

1. Direction of Product placement, position of label sticking, and packaging are carried out according to the listed diagram
2. 600 products in each roll, 1 roll in each small box, a total of 5 small boxes in a large box, a total of 3000 products/box;
3. Carton size：375mm285mm365mm，size of small box：355mm355mm55mm;
4. Put 2 bags of 2g desiccant in the vacuum bag, and 1 piece of 6-color humidity card;
5. Other unfinished matters shall be carried out that according to the customer’s packaging requirements。

FCC Statements:
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:

• This device may not cause harmful interference, and
• this device must accept any interference received, including interference that may cause undesired operation.

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 installed 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 harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the 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.

Warning: Changes or modifications to this unit not expressly approved by the part responsible for compliance could void the user’s authority to operate the equipment.
RF Exposure
This device has been evaluated and shown compliant with the FCC RF Exposure limits under fixed exposure conditions (antennas are greater than 20cm from a person’s body) when installed in certain specific OEM configurations.
2.2 LIST OF APPLICABLE FCC RULES:
Compliance with §15.247 regulation
2.3 SPECIFIC OPERATIONAL USE CONDITIONS:
The module is typically use in industrial, household and general office / ITE and audio & video, EV charging system
end-products. The product must not be co-located or operating in conjunction with any other antenna or transmitters.
2.4 LIMIT MODULE PROCEDURES:
Not applicable as this radio module meets the Single-Modular transmitter requirements.
2.5 TRACE ANTENNA DESIGNS:
The module was designed with the fixed PCB print antenna and the maximum gain is about -1.05dBi between
2400-2500MHz, any changes or modifications by the OEM integrator will require additional testing and evaluation.
2.6 RF EXPOSURE CONSIDERATIONS:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This product must be installed and operated with a minimum distance of 20 cm between the radiator and user body .OEM integrator shall equipped the antenna to compliance with antenna requirement part 15.203& 15.204 and must not be co-located or operating in conjunction with any other antenna or transmitters ,otherwise, a Class II Permissive Change (C2PC) must be filed with the FCC and/or a new FCC authorization must be applied.
2.7 ANTENNAS:
The antenna of the module was designed as PCB printed on the PCBA board and the best gain is about -1.05dBi between 2400-2500MHz. Modification the antenna design may need additional testing and evaluation.
2.8 LABELING AND USER INFORMATION REQUIREMENTS OF THE END PRODUCT:
The final end product must be labelled in a visible area with the following “Contains TX
FCC ID: 2A5QJ-IFINEXUS or “Contains Transmitter Module FCC ID: 2A5QJ- IFINEXUS. If the size of the end product is smaller than 8x10cm, then additional FCC part 15.19 statement is required to be available in the users’ manual: This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:

1. this device may not cause harmful interference, and
2. this device must accept any interference received, including interference that may cause undesired operation.

A user’s manual for the finished product should include one of the following statements:- For a Class A digital device or peripheral, the instructions furnished the user shall include the following or similar statement, placed in a prominent location in the text of the manual:
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

• For a Class B digital device or peripheral, the instructions furnished the user shall include the following or similar statement, placed in a prominent location in the text of the manual:

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 installed 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 harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the 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.

The User’s Manual for The finished product should include the following statements:
Any changes or modifications to this equipment not expressly approved by the OEM/Integrator may cause harmful interference and void the user’s authority to operate this equipment.
2.9 INFORMATION ON TEST MODES AND ADDITIONAL TESTING REQUIREMENTS:
Data transfer module demo board can control the EUT work in RF test mode at specified conditions. This radio module must not be installed to co-locate and operating simultaneously with other radios in the host system except in accordance with FCC multi-transmitter product procedures. Additional testing and equipment authorization may be required operate simultaneously with other radio.
This device is intended only for OEM integrators under the following conditions:

1. The antenna must be installed such that 20cm is maintained between the antenna and users, and
2. The transmitter module may not be co-located with any other transmitter or antenna.

As long as the 2 conditions above are met, further transmitter tests 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.
2.10 ADDITIONAL TESTING, PART 15 SUBPART B DISCLAIMER:
The host product manufacturer is responsible for compliance with any other FCC rules that apply to the host not covered by the modular transmitter grant of certification. The final host product still requires Part 15 Subpart B compliance testing with the modular transmitter installed.
General Statements
The module is limited to OEM installation only.
The OEM integrator is responsible for ensuring that the end-user has no manual instruction to remove or install module.
The OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed.
OEM integrator shall not modify and change the fixed designed PCB print antenna, and must not be co-located or operating in conjunction with any other antenna or transmitters, otherwise, a Class II Permissive Change (C2PC) must be filed with the FCC and/or a new FCC authorization must be applied.

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