User's Manual

AI7681H
MT7681
802.11b/g/n IOT Module
D
901-06201
May 19
th
, 2015
8of 17
Product Name
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Date
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3. Pin Definition
3-1. Pin Description
Pin Definition I/O Description
1 GND VSS Ground Pin
2 GND VSS Ground Pin
3 GND VSS Ground Pin
4 3.3VD VDD Power Supply
5 GND VSS Ground Pin
6 GND VSS Ground Pin
7 GND VSS Ground Pin
8 RST_N I
External System Reset (Low
：
Active)
9 GND VSS Ground Pin
10 UART_RX I RX Pin of UART Interface
11 UART_TX O TX Pin of UART Interface
12 GND VSS Ground Pin
13 GPIO4 I/O Programmable Input / Output
14 GPIO3 I/O Programmable Input / Output
15 GPIO2 I/O Programmable Input / Output
16 GPIO1 I/O Programmable Input / Output
17 GPIO0 I/O Programmable Input / Output
18 GND VSS Ground Pin
19 NC
20 NC
21 NC
22 NC
23 GND VSS Ground Pin
24 3.3VD_RF VDD Power Supply
25 GND VSS Ground Pin
26 GND VSS Ground Pin
27 GND VSS Ground Pin
28~31 ePAD VSS Ground Pin
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