ODROID C2 User Manual

2023/09/02 08:29 1/3 USB Hub IC reset script
ODROID Wiki - https://wiki.odroid.com/
Power On/Off switch
You can control power supplying to ODROID-C2 while DC adaptor is connected with external switch,
Sliding or Toggle Switch for example, if you connect such switch to J4 on the board. J4 is connected to
NCP372 (Protection IC). There is an ENABLE pin on the NCP372 and it is a low-active and have an
internal pull-down resistor for default on.
Switch status Output of NCP372
ON(short) OFF
OFF(open) ON (+5V)
With this hacking, we strongly recommend to shutdown the O/S
completely before turn-off. Otherwise the file system could be
corrupted very easily. In Linux, for example, please make sure to
execute shutdown -r now or poweroff.
Alternative power input
The J8 pins are added for an alternative power input (for easier wiring/soldering to power supply cable
on PCB rev0.2 20160226)
Alternative heartbeat LED
If you want to remap the blue heartbeat LED to other GPIO, refer this great instruction.
paulcrawford's guide on the forum

ODROID C2 Specifications

General

Processor	Amlogic S905
RAM	2GB DDR3 SDRAM
Storage	microSD slot, eMMC module socket
Ethernet	Gigabit Ethernet
Dimensions	85 x 56 mm
Operating System Support	Ubuntu, Android
GPIO	40-pin header
CPU	Quad-core ARM Cortex-A53 (up to 2.0GHz)
GPU	Mali-450 MP3
USB Ports	4 x USB 2.0
Video Output	HDMI 2.0
Audio Output	HDMI
Power Supply	5V/2A

Summary

Power On/Off Switch Control

Switch Status and NCP372 Output

Table detailing switch states (ON/OFF) and corresponding NCP372 output (OFF/+5V).

Shutdown Warning for OS Integrity

Recommendation to shut down the OS before powering off to prevent file system corruption.

Alternative Power Input

J8 Pins for Power Supply Connection

J8 pins are provided for easier wiring and soldering to a power supply cable.

Heartbeat LED Customization

Guide for Remapping Heartbeat LED

Instruction to refer to an external guide for remapping the blue heartbeat LED to other GPIO.

Android IR Remote Controller

IR Remote Key Mapping Table

Table mapping IR button codes, scancodes, and Android keycodes for remote control functions.

Default IR Protocol

Specifies that the default IR protocol used is NEC type.

USB Hub IC Reset Procedure

GPIO Export for Reset

Commands to export GPIO 126, preparing it for the reset operation.

GPIO Value Manipulation for Reset

Commands to set GPIO 126 value to 0 and then 1, executing the reset sequence.

GPIO Unexport After Reset

Command to unexport GPIO 126, completing the reset process.