Data Sheet

Key:

Version 1.6 (July 2020)

Table 2. Pinout for the 40-pin I/O header. (For detailed usage information, see Connect to the Dev Board I/O pins.)

SoC signal name Baseboard signal Header pins Baseboard signal SoC signal name

+3.3V power 1 2 +5V power

I2C2_SDA I2C2_SDA 3 4 +5V power

I2C2_SCL I2C2_SCL 5 6 Ground

UART3_TXD UART3_TXD 7 8 UART1_TXD UART1_TXD

Ground 9 10 UART1_RXD UART1_RXD

UART3_RXD UART3_RXD 11 12 SAI1_TXC SAI1_TXC

GPIO6 GPIO_P13 13 14 Ground

PWM3 PWM3 15 16 GPIO_P16 NAND_DATA03

+3.3V power 17 18 GPIO_P18 ECSPI2_SCLK

ECSPI1_MOSI ECSPI1_MOSI 19 20 Ground

ECSPI1_MISO ECSPI1_MISO 21 22 GPIO_P22 ECSPI2_MISO

ECSPI1_SCLK ECSPI1_SCLK 23 24 ECSPI1_SS0 ECSPI1_SS0

Ground 25 26 ECSPI1_SS1 ECSPI1_SS1

I2C3_SDA I2C3_SDA 27 28 I2C3_SCL I2C3_SCL

GPIO7 GPIO_P29 29 30 Ground

GPIO8 GPIO_P31 31 32 PWM1 PWM1

PWM2 PWM2 33 34 Ground

SAI1_TXFS SAI1_TXFS 35 36 GPIO_P36 ECSPI2_SS0

NAND_DATA07 GPIO_P37 37 38 SAI1_RXD0 SAI1_RXD0

Ground 39 40 SAI1_TXD0 SAI1_TXD0

Synchronous Audio

Interface (SAI)

Serial Peripheral

Interface (SPI)

General Purpose

I/O (GPIO)

+5V power

Inter-Integrated

Circuit (I2C)

Universal Asynchronous

Receiver-Transmitter (UART)

Ground +3.3V power