1、3、4、5、6、7、8、10、11、23、32、39

GND

Ground connections

2

WiFi_5G

WiFi5G radio frequency

9

WiFi_2G

WiFi2.4G radio frequency

12

BT_RF

Bluetooth RF

13

GPIOB0

GPIO

14

GPIOB1

GPIO

15

GPIOB2

GPIO

16

GPIOB5

GPIO

17

SD_CMD

SD interface

18

SD_CLK

SD interface

19

SD_D3

SD interface

20

SD_D2

SD interface

21

SD_D0

SD interface

22

SD_D1

SD interface

24

GPIOB5

GPIO

25

GPIO13

GPIO

26

UART0_RX

Serial port (used for main chip debugging)

27

PCM_SYNC

PCM interface

28

PCM_DIN

PCM interface

29

PCM_DOUT

PCM interface

30

PCM_CLK

PCM interface

31

GPIOB4

GPIO

33

UART0_TX

Serial port (used for main chip debugging)

34

VCC_IO

Interface power

36

VCC_3V3

Power input

38

GPIOB6

GPIO

40

UART1_TX

Serial port (Bluetooth serial port supports VOHCI)

41

UART1_RX

Serial port (Bluetooth serial port supports VOHCI)

42

UART1_RTS

Serial port (Bluetooth serial port supports VOHCI)