User's Manual

7
2.2 44pin QFN Pin definition
The pin definition is as below, and its pin number refers to item 2.1.
Pin # Name Pin # Name
1 I2C_SCL 21 nCTS_DM
2 I2C_SDA 22 TXD
3 JTMSSWDIO 23 RXD
4 I2S_MCK 24 VCC3V3
5 PA3_RX2-TCP 26 32K_SLPCLK_OUT
6 SPI-NSS_I2S-WS 27 BOOT0
7 JTDO_SPI-CLK_I2S-CK 28 JTCKSWCLK
8 NJTRST_SPI-MISO_I2Sext_SD 29 WAKE_UP
9 SPI-MOSI_I2S-SD 30 status
10 SPI_INT 31 GPIO_PA5
11 Readyness 32 GPIO_PA6
12 GPIO_PC2 33 GPIO_PA7
13 GPIO_PB14 34 GPIO_PB15
14 GPIO_PC6 35 GPIO_PC3
16 nRF_LED 36 GPIO_PC4
17 nRESET 37 GPIO_PC0
18 JTDI_DSR 38 PA2_TX2
19 DATA_RDY 15,25,39~44 GND
20 nRTS_DP