Hi-Link WM7628N-A Wireless USB Wifi Module User Manual

INTRODUCTION

WM7628N-A based on MT7628NN is a low-cost and low power consumption IOT module developed. This module leads to all the interfaces of MT7628NN, The module supports Linux, OpenWRT operating system, and custom development. It could be widely applied to smart devices or cloud services applications with its rich interface and powerful processors, at the same time, it also supports secondary development.

1.1. BASIC PARAMETER

High data processing ability， MCU frequency 580MHz
300M Mbps
Support 802.11b/g/n
20/40 Channel bandwidth
Support 802.11v
Support AP, STA, and AP, STA  mixed
Five 10/100M ETH PORT
1 USB2.0 Host interface port| Interface SPI/SD-XC/eMMC
Rich peripheral interfaces，SPI,I2C,I2S,PCM,UART,JTAG,GPIO
Widely used in IoT
Inbuilt powerful PMU
Support 16 Multiple BSSID
Support multiple security methods
WEP64/128, TKIP, AES, WPA, WPA2, WAPI
Support QoS， WMM， WMM-PS
Support Linux 2.6.36 SDK， OpenWrt 3.10
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DIAGRAM

SPECIFICATIONS

Item

| Parameter|

Note

---|---|---
Model| WM7628N-A| Version V1.0
Chip| MT7628AN/MT7628NN|
Kernel| MIPS24KEc|
Basic frequency| 580MHz|
RAM| DDR2 128MB| Customizable DDR2 64M/32MB
Flash| 32MB| Customizable 16MB/8MB
Temperature| Environment temperature：-40℃~85℃|
Humidity| Working：10~95%（noncondensing） Storage：5~95% noncondensing）|
Size| 18mm×35.2mm×2.8mm|
---|---|---

INTERFACE NUMBER

Notes; default embedded our firmware which is based on Linux; the Ethernet,WiFi, UART0 and UART1 of the firmware has the function of transmission
Based on actual usage, the module also can be embedded OpenWrt program and LINUX program of MTK original plant before being sent out.

ELECTRICAL CHARACTERISTIC
POWER SUPPLY REQUIREMENT

Power supply requirement

Input voltage| DC:3.3±0.2V
Non-load current| 170±50mA
Supply current| ≥800mA

3.2. RF PERFORMANCE
802.11b 11M

802.11b Transmit (Conductive)

Item| Condition| Min.| Typ.| Max.| Unit
Frequency Range| | Channel 1| | Channel 13|
Frequency Tolerance| | -15| 0| 15| ppm
---|---|---|---|---|---
Modulation Accuracy| All Data Rate| | -31| -28| dB

802.11n_HT20 Receiver (Conductive)

Item| Condition| Min.| Typ.| Max.| Unit
Frequency Range| | Channel 1| | Channel 13|
Min. Input| MCS7 PER<10%| -76.5| -74.5| -72.5| dBm

11n_MCS7(HT40)

802.11n_HT40 Transmit (Conductive)

Item| Condition| Min.| Typ.| Max.| Unit
Frequency Range| | Channel 1| | Channel 13|
Tx Power Level| OFDM| 15.0| 17.0| 19.0| dBm
Frequency Tolerance| | -15| 0| 15| ppm
Modulation Accuracy| All Data Rate| | -31| -28| dB

802.11n_HT40 Receiver (Conductive)

Item| Condition| Min.| Typ.| Max.| Unit
Frequency Range| | Channel 1| | Channel 13|
Min. Input| MCS7 PER<10%| -76.5| -74.5| -72.5| dBm

MODULE PINS DEFINITION
DEFAULT PIN DEFINITION CHART

Spectral Mask

| 11MHz→22MHz| | 40| | Br
＞22MHz| | 53| | Br
Modulation Accuracy| All Data Rate| | 15| | %
802.11b Receiver (Conductive)
Item| Condition| Min.| Typ.| Max.| Unit
Frequency Range| | Channel 1| | Channel 13|
Min. Input| 11Mbps PER<8%| -91.5| -89.5| -87.5| dBm

802.11g 54M

802.11g Transmit (Conductive)

Item| Condition| Min.| Typ.| Max.| Unit
Frequency Range| | Channel 1| | Channel 13|
Tx Power Level| OFDM| 15| 17| 19| dBm
Frequency Tolerance| | -15| 0| 15| ppm
Modulation Accuracy| All Data Rate| | -31| -28| %
802.11g Receiver (Conductive)
Item| Condition| Min.| Typ.| Max.| Unit
Frequency Range| | Channel 1| | Channel 13|
Min. Input| 54Mbps PER<10%| -78.0| -76.0| -74.0| dBm

11n MCS7(HT20)

802.11n_HT20 Transmit (Conductive)

Item| Condition| Min.| Typ.| Max.| Unit
Frequency Range| | Channel 1| | Channel 13|
Tx Power Level| OFDM| 15| 17| 19| dBm
Frequency Tolerance| | -15| 0| 15| ppm
---|---|---|---|---|---
Modulation Accuracy| All Data Rate| | -31| -28| dB

802.11n_HT20 Receiver (Conductive)

Item| Condition| Min.| Typ.| Max.| Unit
Frequency Range| | Channel 1| | Channel 13|
Min. Input| MCS7 PER<10%| -76.5| -74.5| -72.5| dBm

11n_MCS7(HT40)

802.11n_HT40 Transmit (Conductive)

Item| Condition| Min.| Typ.| Max.| Unit
Frequency Range| | Channel 1| | Channel 13|
Tx Power Level| OFDM| 15.0| 17.0| 19.0| dBm
Frequency Tolerance| | -15| 0| 15| ppm
Modulation Accuracy| All Data Rate| | -31| -28| dB

802.11n_HT40 Receiver (Conductive)

Item| Condition| Min.| Typ.| Max.| Unit
Frequency Range| | Channel 1| | Channel 13|
Min. Input| MCS7 PER<10%| -76.5| -74.5| -72.5| dBm

MODULE PINS DEFINITION
DEFAULT PIN DEFINITION CHART

Notes：

1. All pins default 1, drive current 8MA.
2. Red representation on the name bar: related to the start of the chip, the outside can not be pulled up and down, not connected with the driver source.
3. Blue representation on the name bar: The default firmware.
4. The module of the MT7628NN chip does not have a PCI-E interface

MODULE DIMENSION CHART

Recommended package size diagram
Notes：
The three intermediate pads are hot pads, please ground.
Package pad epitaxial size can be appropriately shortened or lengthened according to demand.

European label

6.1. European label text version
eVatmaster Consulting GmbH
Bettina. 30,60325 Frankfurt am Main, Germany contact@evatmaster.com
6.2. 7.2European label picture format (for reference only, you can design according to your packaging)

EU REP
eVatmaster Consulting GmbH Bettinastr. 30 60325 Frankfurt am Main, Germany contact@evatmaster.com

FCC regulatory information
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. Warning: Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
End Device Labelling
Please notice that if the FCC identification number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following: “Contains FCC ID: Z4T-WM7628N-A” any similar wording that expresses the same meaning may be used.
RF Exposure Compliance
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20cm between the radiator & your body. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
Installation Notice
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 module is limited to installation in the mobile applications; A separate approval is required for all other operating configurations, including portable configurations with respect to Part 2.1093 and different antenna configurations.
FCC Part 15B Compliance of End Device
The OEM integrator is responsible for ensuring that the host product which is installed and operating with the module is in compliant with Part 15B unintentional Radiator requirements, please note that For a Class B digital device or peripheral, the instructions furnished the user manual of the end- user product shall include the following or similar statement, placed in a prominent location in the text of the manual:
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.
OEM Installation Guidance Document
FCC ID: Z4T-WM7628N-A
Conditions on using Seeed regulatory approvals:
A. Customer must ensure that its product (the“CUSTOMER Product”) is electrically identical to Seeed reference designs. The customer acknowledges that any modifications to Seeed reference designs may invalidate regulatory approvals in relation to the CUSTOMER Product, or may necessitate notifications to the relevant regulatory authorities.
B. Customer is responsible for ensuring that antennas used with the product are of the same type, with the same or lower gains as approved and providing antenna reports to Seeed.
C. Customer is responsible for regression testing to accommodate changes to Seeed reference designs, new antennas, and portable RF exposure safety testing/approvals.
D. Appropriate labels must be affixed to the CUSTOMER Product that complies with applicable regulations in all respects.
E. A user’s manual or instruction manual must be included with the customer product that contains the text as required by applicable law. Without limitation of the foregoing, an example (for illustration purposes only) of possible text to include is set forth below:
1. USA—Federal Communications Commission (FCC)
FCC COMPLIANCE STATEMENT:
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.
INFORMATION TO USER:
2.1 General：
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of 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. If not installed and used in accordance with the instructions, it 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 and correct the interference by one or more of the following measures:
-Reorient or relocate the receiving antenna
-Increase the distance between the equipment and the receiver.
-Connect the equipment to 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.
FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate this equipment.
System integrators must include the FCC ID on the end product.
2.2 List of applicable FCC rules：
The Seeed module is only FCC authorized (certified) for the transmitter- specific rule parts, FCC 15.247. OEM manufacturer is responsible for compliance with all other FCC rules that apply to the host.
2.3 &2.6 Summarize the specific operational use conditions and FCC Radio- Frequency Exposure & Approval Conditions：
Transmitting antenna(s) can only be installed at the display section of the computer. When this device is installed other than notebook computers, at least 20 cm separation distance shall be maintained between the transmitting antenna(s) to the body of user or nearby person.
2.4 Limited module procedures：
The module is an unrestricted module
2.5 Trace antenna designs：
The antenna(s) used for this transmitter must not be collocated or operating in conjunction with any other antenna or transmitter within a host device, except in accordance with FCC multi-transmitter product procedures.
2.7 Antennas：
The module grantee is responsible for providing the documentation to the system integrator on restrictions of use, for continuing compliance of the module including the maximum antenna gain (6dBi), minimum antenna gain (3dBi), Antenna connector is a unique I-PEX connector.
2.8 Label and compliance information：
The regulatory label on the final system must include the statement: “ Contains FCC ID: Z4T-WM7628N-A” using the electronic labeling method as documented in KDB 784748.
2.9 Information on test modes and additional testing requirements：
OEM manufacturer should perform additional verification/validation on supported modes and is responsible for validation testing of module + host.
The final system integrator must ensure there is no instruction provided in the user manual or customer documentation indicating how to install or remove the transmitter module except such device has implemented two-way authentication between the module and the host system.
2.10 Additional testing, Part 15 Subpart B disclaimer：
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. FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate this equipment.
7. It is forbidden to operate transmitters outside the 2.4-2.4835 GHz frequency band to control or communicate
8. The certified WLAN module will be installed in the mobile application.
9. This module is for integration into a host system which is intended.

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