
第
4
页 共
34
页
6
P21_TMS_F_CS
I/O
P21
7
P20_TCK_F_SC
I/O
P20
8
VBAT
P
3.3V power
9
P28
I/O
Enter at command mode/restore factory
settings, please pull up if you don
’
t use it,
same as P22
10
P16
I/O
P16
11
P17
I/O
P17
12
P14
I/O
P14
13
P15
I/O
P15
14
P6_PWM0
I/O
P6,PWM0
15
GND
P
GND
16
P7_PWM1
I/O
Wifi indicator
17
P8_PWM2
I/O
Wifi connection status indicator
1: connected
0: Disconnected
18
P9_PWM3
I/O
Socket connection status indicator
1: connected
0: Disconnected
19
P1_URAT2_RXD
I/O
P1,UART2
20
P0_UART2_TXD
I/O
P0,UART2
21
P10_UART1_RXD
I/O
P10, UART1, used for upgrade, command
setting and transparent transmission
22
P11_UART1_TXD
I/O
P11, UART1, used for upgrade, command
setting and transparent transmission