Linkplay A31 - Pin Description

Doc Title Wireless smart audio module
Number
WMB20150921
Version
1.
4
Document No.: WMB20150921 Page 7 of 21
Figure 2-1 LinkPlay WiFi Audio A31 interface pins
Pin description：
Pin Description Net Type Comments
3,4,21
,28
GND GND Power Ground
1,2 5VD input DC+5V Power, I +5V@ 350mA
20 3.3VD output DC+3.3V Power, O Output +3.3V@100mA
5 I2S_WS I2S_WS O All pins could be pin shared as
GPIO
6 I2S_CLK I2S_CLK I/O
7 I2S_SDO I2S_SDO O
8
I2S_SDI I2S_SDI
I
9 ETH_TXP ETH_TXP O 10M/100M Ethernet interface
(Current driven)
10 ETH_TXN ETH_TXN O
11 ETH_RXP ETH_RXP I
12 ETH_RXN ETH_RXN I
13 USB_DM USB_DM I/O USB 2.0 host