Expansion Connectors (Board Revision 0.1 : 2015/10/26)

The ODROID-C2 provides one 40-pin dual row expansion header “J2”. The location and pinout of these connectors is illustrated blew.
All signals on expansion headers are 3.3V except Analog input signal.

* signal not connnected.


J2 - 2×20 pins

Pin Number Expansion Net Name Description Pin Number Expansion Net Name Description
13.3V Power 25.0V Power
3I2CA_SDA Export GPIO#205 45.0V Power
5I2CA_SCL Export GPIO#206 6Ground
7GPIOY.BIT3 Export GPIO#214, Wiring Pi GPIO#7*8TXD1Export GPIO#244
9Ground *10RXD1Export GPIO#245
11GPIOY.BIT8 Export GPIO#219, Wiring Pi GPIO#012GPIOY.BIT7Export GPIO#218, Wiring Pi GPIO#1
13GPIOX.BIT19Export GPIO#247, Wiring Pi GPIO#214Ground
*15GPIOX.BIT18Export GPIO#246, Wiring PI GPIO#316GPIOX.BIT7Export GPIO#235, Wiring Pi GPIO#4, PWM1
173.3V Power 18GPIOX.BIT5Export GPIO#233, Wiring Pi GPIO#5
19GPIOX.BIT10Export GPIO#238, Wiring Pi GPIO#1220Ground
21GPIOX.BIT9Export GPIO#237, Wiring Pi GPIO#1322GPIOX.BIT6Export GPIO#234, Wiring Pi GPIO#6, PWM0
23GPIOX.BIT8Export GPIO#236, Wiring Pi GPIO#1424GPIOX.BIT20Export GPIO#248, Wiring Pi GPIO#10
25Ground 26GPIOX.BIT21Export GPIO#249, Wiring Pi GPIO#11
27I2CB_SDA Export GPIO#207 28I2CB_SCL Export GPIO#208
29GPIOX.BIT4Export GPIO#232, Wiring Pi GPIO#2130Ground
31GPIOX.BIT3Export GPIO#231, Wiring Pi GPIO#2232GPIOX.BIT2Export GPIO#230, Wiring Pi#26
33GPIOX.BIT11Export GPIO#239, Wiring Pi GPIO#2334Ground
35GPIOX.BIT0Export GPIO#228, Wiring Pi GPIO#2436GPIOX.BIT1Export GPIO#229, Wiring Pi GPIO#27
37ADC.AIN110bit ADC#1 (0~1.8Volt)381.8V PowerFor ADC reference voltage. Output!
39Ground 40ADC.AIN010bit ADC#0 (0~1.8Volt)

* Note: Pin# 8,10,15 are not connected to the 40pin header accidentally on the Engineering sample boards.
This issue is resolved in the production version.

J7 - 1×7 pins

This I2S expansion connector exists only on the C2

Pin Number Expansion Net Name Description
1Ground
2GPIOAO.BIT6I2S Data Input
3P5V0 5.0V Power
4GPIOAO.BIT8 I2S MCLK
5GPIOAO.BIT10 I2S LRCLK
6GPIOAO.BIT9 I2S SCLK
7GPIOAO.BIT11 I2S Data Output