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Block Diagram and Schematic

ODROID-C2 targets to be a cheap, small and flexible enough computer for daily life.
Built with ARM 64bit Cortex-A53 Quad-core CPU and Mali450MP3 GPUs, and open source software, ODROID-C2 can serve as a platform to make lots of applications for different purposes.

Schematics and drawings are available in this link.
Hardware Specification



ProcessorAmlogic S905 : Quad Core Cortex™-A53 (ARMv8 64bit) processor with Triple Core Mali-450 GPU
RAM2GByte DDR3 (32bit / 912Mhz)
eMMC module socketThe eMMC storage access time is 2-3 times faster than the SD card. You can purchase 4 size options: 8GB, 16GB, 32GB and 64GB. Using an eMMC module will increase speed and responsiveness, similar to the way in which upgrading to a Solid State Drive (SSD) in a typical PC also improves performance over a mechanical hard drive (HDD).
Micro Secure Digital (MicroSD) Card slotThere are two different methods of storage for the operating system.
One is by using a MicroSD Card and another is using an eMMC module, which is normally used for external storage for smartphones and digital cameras.
The ODROID-C2 can utilize the newer UHS-1 SD model, which is about 2 times faster than a normal class 10 card.
Note that there are some cards which needs additional booting delay time around 30 seconds.
According to our test, most Sandisk Micro-SD cards don't cause the booting delay. We will make a compatibility list soon.
5V 2A DC inputhis is for 5V power input, with an inner diameter of 0.8mm, and an outer diameter of 2.5mm. The ODROID-C2 consumes less than 0.8A in most cases, but it can climb to 2A if many passive USB peripherals are attached directly to the main board.
USB host portsThere are four USB 2.0 host ports.
You can plug a keyboard, mouse, WiFi adapter, storage or many other devices into these ports.
You can also charge your smartphone with it! If you need more than 4 ports, you can use a powered external USB hub to reduce the power load on the main device.
HDMI portThe Type-A standard-HDMI connector is populated on the board. If you use a UHD/4K 60Hz display, your HDMI cable must be compatible with HDMI 2.0 speed.
Ethernet RJ-45 jackThe standard RJ45 Ethernet port for LAN connection supports 10/100/1000Mbps speed.
Green LED Flashes when there is 100Mbps connectivity
Yellow(Orange/Amber) LED Flashes when there is 1000Mbps connectivity
Status / Power LEDsThe ODROID-C2 has four indicator LEDs that provide visual feedback.
Red LED : Power Hooked up to 5V power
Blue LED
Alive Solid light : u-boot is running
Flashing : Kernel is running (heart beat)
Infrared (IR) receiverThis is a remote control receiver module that can accept standard 37.9Khz carrier frequency based wireless data.
Micro USB OTG port You can use the standard micro-USB connector with Linux Gadget drivers on your host PC, which means that the resources in the ODROID-C2 can be shared with typical PCs.
You can also add a micro-USB to HOST connector if you need an additional USB host port.
Note that this port can be used for power input if you install a jumper near the HDMI connector.
General Purpose Input and Output (GPIO) portsThese 40pin GPIO port can be used as GPIO/I2C/UART/ADC for electronics and robotics.
The 40 GPIO pins on an ODROID-C2 are a great way to interface with physical devices like buttons and LEDs using a lightweight Linux controller.
If you’re a C/C++ or Python developer, there’s a useful library called WiringPi that handles interfacing with the pins. We’ve already ported the WiringPi v2 library to ODROID-C2.
Note that all the GPIO ports are 3.3Volt. The ADC inputs are limited to 1.8Volt.
Serial console portConnecting to a PC gives access to the Linux console.
You can see the log of the boot, or to log in to the C2 to change the video or network settings.
Note that this serial UART uses a 3.3 volt interface. We recommend the USB-UART module kit from Hardkernel.
Molex 5268-04a(2.5mm pitch) is mounted on the PCB. Its mate is Molex 50-37-5043 Wire-to-Board Crimp Housing.
Gigabit Ethernet PHYRealtek RTL8211F is a highly integrated Ethernet transceiver that complies with 10Base-T, 100Base-TX, and 1000Base-T IEEE 802.3 standards.
USB MTT hub controllerGENESYS LOGIC GL852G is used to implement the 4-port Hub function which fully complies with Universal Serial Bus Specification Revision 2.0.
USB VBUS controllerNCP380 Protection IC for USB power supply from OnSemi.
Power switch portYou can add a slide switch or rocker switch on this port if you want to implement a hardware on/off switch.
If this port is closed, the power is off.
If this port is opened, the power is on.
Power supply circuitDiscrete DC-DC converters LDOs are used for CPU/DRAM/IO power supply.
Power protector ICNCP372 Over-voltage, Over-current, Reverse-voltage protection IC from OnSemi.

Due to the limited power output from a computer's USB port, we suggest only powering the ODROID-C2 with a good quality 5V/2A PSU

Expansion Connectors

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.
If you use the engineering sample, refer a pin map on this link. Expansion Connectors (Board Revision 0.1 : 2015/10/26)

J2 - 2×20 pins

Pin Number Expansion Net Name Description Driving Capability Pin Number Expansion Net Name Description Driving Capability
13.3V Power 25.0V Power
3I2CA_SDA Export GPIO#205 45.0V Power
5I2CA_SCL Export GPIO#206 6Ground
7GPIOX.BIT21 Export GPIO#249, Wiring Pi GPIO#7 3mA 8TXD1/dev/ttyS1, Export GPIO#240
9Ground 10RXD1/dev/ttyS1, Export GPIO#241
11GPIOX.BIT19 Export GPIO#247, Wiring Pi GPIO#0 3mA 12GPIOX.BIT10Export GPIO#238, Wiring Pi GPIO#1 3mA
13GPIOX.BIT11 Export GPIO#239, Wiring Pi GPIO#2 3mA 14Ground
15GPIOX.BIT9 Export GPIO#237, Wiring PI GPIO#3 3mA 16GPIOX.BIT8Export GPIO#236, Wiring Pi GPIO#4 3mA
173.3V Power 18GPIOX.BIT5Export GPIO#233, Wiring Pi GPIO#5 4mA
19GPIOX.BIT7Export GPIO#235, Wiring Pi GPIO#12, PWM1 3mA 20Ground
21GPIOX.BIT4Export GPIO#232, Wiring Pi GPIO#13 4mA 22GPIOX.BIT3Export GPIO#231, Wiring Pi GPIO#6 4mA
23GPIOX.BIT2Export GPIO#230, Wiring Pi GPIO#14 4mA 24GPIOX.BIT1Export GPIO#229, Wiring Pi GPIO#10 4mA
25Ground 26GPIOY.BIT14Export GPIO#225, Wiring Pi GPIO#11 3mA
27I2CB_SDA Export GPIO#207 28I2CB_SCL Export GPIO#208
29GPIOX.BIT0Export GPIO#228, Wiring Pi GPIO#21 4mA 30Ground
31GPIOY.BIT8Export GPIO#219, Wiring Pi GPIO#22 3mA 32GPIOY.BIT13Export GPIO#224, Wiring Pi#26 3mA
33GPIOX.BIT6Export GPIO#234, Wiring Pi GPIO#23, PWM0 3mA 34Ground
35GPIOY.BIT3Export GPIO#214, Wiring Pi GPIO#24 3mA 36GPIOY.BIT7Export GPIO#218, Wiring Pi GPIO#27 3mA
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 of PCB rev 0.2.

ODROID-C2 deosn't support the HW SPI.

J7 - 1×7 pins

This I2S expansion connector exists only on the C2

Pin Number Expansion Net Name Description Driving Capability
2GPIOAO.BIT6SPDIF Output, Export GPIO#128 2mA
3P5V0 5.0V Power
4GPIOAO.BIT8 I2S MCLK, Export GPIO#130 2mA
5GPIOAO.BIT10 I2S LRCLK, Export GPIO#132 2mA
6GPIOAO.BIT9 I2S SCLK, Export GPIO#131 2mA
7GPIOAO.BIT11 I2S Data Output, Export GPIO#133 2mA

Square soldering pad is Pin #1 as below picture.

UART Console Connector

|Pin 4 - GND|
|Pin 3 - RXD|
|Pin 2 - TXD|
|Pin 1 - VCC|


Enable the OTG device function on ODROID-C2

Micro USB Power

Remove the Jumper on J1 if you don't use the USB OTG port as a power input
It will reduce the power consumption and heat significantly.

ODROID-C2 power can be provided through USB OTG port instead of DC jack by connecting jumper J1.

Since ODROID-C2 can consume current more than 0.8Amp by itself while playing a video file or with some peripherals - keyboard/mouse/WiFi dongle - are attached to USB port, we strongly recommend to use 5V USB charger with minimal 1.5Amp+ can be supplied. Please note that still DC jack works with the same specification of ODROID-C2 apart from USB OTG for power supplying.

If there is a USB device attached on USB host connector and consumes power a lot, the board might not be booted because the CPU can not be provided enough current. In order to prevent boot failure in such case, especially a USB device consumes a current more than 1A, we strongly recommend to keep providing power through DC jack.

Caution : Over-Voltage Protection feature

1. The power source must be connected to the DC-Jack.
Micro-USB-OTG and other 5Volt rails have not the protection feature.

2. Micro-USB power path Jumper(J1) must be removed to enable the Over-Voltage Protection even you use the DC-Jack.

3. Maximum over-voltage must be lower than 16Volt.

Regulatory Compliance Documents

en/c2_hardware.txt · Last modified: 2017/07/04 11:01 by john1117
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