Specifications

3181A-S SPEC
石头世纪科技有限公司 内部文档 6
3.5 PIN Assignment
Pin #
Name
Type
Description
1
GND
/
Ground connections
2
WL_ANT
I/O
RF I/O port
3
GND
/
Ground connections
4~5
NC
/
Floating (Don’t connected to ground)
6
Host wake device
I
Host Wake up Wi-Fi, GPIO06
(Don’t support this function currently )
7
GPIO8
I/O
SDIO interrupt
(Floating if not used)
8
NC
/
Floating (Don’t connected to ground)
9
VCC
P
Main power voltage source input 2.3V-3.6V
10
NC
/
Floating (Don’t connected to ground)
11
NC
/
Floating (Don’t connected to ground)
12
PMU_POWRON
I
Enable pin for WLAN device
Defualt ON: pull high ; OFF: pull low
Suggest using this pin shut down
module for saving mode