User's Manual

4. Pin Assignment
No.
Pin name
Description
1、3、4、
9、18、26
GND
GND
2
ANT
External antenna available when required
5
P31
IO interface， ADC1
6
P32
IO interface，ADC2
7
P14
IO interface， PWM4
8
VCCBAT
3.0V VCC
10
RSTN
Reset, low effective(controlled by external MCU
IO)
11
P00/TXD1
IO interface or UART1 RXD，for UART sending
12
P01/RXD1
IO interface ，UART1 RXD，for UART reception
13
P17
IO interface，UART_RXD2
14
P16
IO interface，UART_TXD2
15
P13
IO interface，PWM3
16
P33
IO interface，ADC3
17
P12
IO interface，PWM2
19
P10
IO interface，PWM0
20
P07
IO interface，PWM5，SPI_NSS， JTAG_TMS
21
P06
IO interface，SPI_MISO，PWM4，JTAG_TCK
22
P05
IO interface，SPI_MOSI ，JTAG_TDO
23
P04
IO interface，SPI_SCK ，JTAG_TDI
24
P03
IO interface，I2C_SDA , JTAG_NTRST
25
P02
IO interface，I2C_SCL
1