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 |
|---|---|---|---|---|---|
| 1 | 3.3V Power | 2 | 5.0V Power | ||
| 3 | I2CA_SDA | Export GPIO#205 | 4 | 5.0V Power | |
| 5 | I2CA_SCL | Export GPIO#206 | 6 | Ground | |
| 7 | GPIOY.BIT3 | Export GPIO#214, Wiring Pi GPIO#7 | *8 | TXD1 | Export GPIO#244 |
| 9 | Ground | *10 | RXD1 | Export GPIO#245 | |
| 11 | GPIOY.BIT8 | Export GPIO#219, Wiring Pi GPIO#0 | 12 | GPIOY.BIT7 | Export GPIO#218, Wiring Pi GPIO#1 |
| 13 | GPIOX.BIT19 | Export GPIO#247, Wiring Pi GPIO#2 | 14 | Ground | |
| *15 | GPIOX.BIT18 | Export GPIO#246, Wiring PI GPIO#3 | 16 | GPIOX.BIT7 | Export GPIO#235, Wiring Pi GPIO#4, PWM1 |
| 17 | 3.3V Power | 18 | GPIOX.BIT5 | Export GPIO#233, Wiring Pi GPIO#5 | |
| 19 | GPIOX.BIT10 | Export GPIO#238, Wiring Pi GPIO#12 | 20 | Ground | |
| 21 | GPIOX.BIT9 | Export GPIO#237, Wiring Pi GPIO#13 | 22 | GPIOX.BIT6 | Export GPIO#234, Wiring Pi GPIO#6, PWM0 |
| 23 | GPIOX.BIT8 | Export GPIO#236, Wiring Pi GPIO#14 | 24 | GPIOX.BIT20 | Export GPIO#248, Wiring Pi GPIO#10 |
| 25 | Ground | 26 | GPIOX.BIT21 | Export GPIO#249, Wiring Pi GPIO#11 | |
| 27 | I2CB_SDA | Export GPIO#207 | 28 | I2CB_SCL | Export GPIO#208 |
| 29 | GPIOX.BIT4 | Export GPIO#232, Wiring Pi GPIO#21 | 30 | Ground | |
| 31 | GPIOX.BIT3 | Export GPIO#231, Wiring Pi GPIO#22 | 32 | GPIOX.BIT2 | Export GPIO#230, Wiring Pi#26 |
| 33 | GPIOX.BIT11 | Export GPIO#239, Wiring Pi GPIO#23 | 34 | Ground | |
| 35 | GPIOX.BIT0 | Export GPIO#228, Wiring Pi GPIO#24 | 36 | GPIOX.BIT1 | Export GPIO#229, Wiring Pi GPIO#27 |
| 37 | ADC.AIN1 | 10bit ADC#1 (0~1.8Volt) | 38 | 1.8V Power | For ADC reference voltage. Output! |
| 39 | Ground | 40 | ADC.AIN0 | 10bit 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 |
|---|---|---|
| 1 | Ground | |
| 2 | GPIOAO.BIT6 | I2S Data Input |
| 3 | P5V0 | 5.0V Power |
| 4 | GPIOAO.BIT8 | I2S MCLK |
| 5 | GPIOAO.BIT10 | I2S LRCLK |
| 6 | GPIOAO.BIT9 | I2S SCLK |
| 7 | GPIOAO.BIT11 | I2S Data Output |