Libre Computer Board ALL-H3-CC
|Libre Computer Board ALL-H3-CC|
|Manufacturer||Libre Computer Project|
|Release Date||January 2018|
|Website||ALL-H3-CC Product Page|
|SoC||H2+, H3, H5 @ 1.0GHz|
|DRAM||512MiB, 1GiB, 2GiB DDR3 @ 1333MHz, h2+:H5TQ2G63GFR-RDC, h3/h5:H5TQ4G63CFR-RDC|
|Power||DC 5V @ 2A (µUSB)|
|Video||HDMI (Type A - full), CVBS|
|Audio||3.5mm headphone plug, HDMI, SPDIF, I2S, internal microphone|
|Storage||µSD, eMMC module port|
|USB||3 USB2.0 Host, 1 USB2.0 OTG|
The Libre Computer Board ALL-H3-CCs are H2+ / H3 / H5 powered development boards originally introduced via a Kickstarter campaign in 2017.
Points distinguishing this board from others:
- Raspberry Pi 3 compatible form factor
- eMMC 4.x module port (8/16/32/64/128GB)
- CE/FCC certification
- Big push-pin heatsink with thermal tape, covering SoC and ram
- Quality components, tier-1 ram chips
This board is produced in white colour and has 3 variants that only differ in SoC/ram used:
- ALL-H3-CC H2+ 512MB (Tritium IoT)
- ALL-H3-CC H3 1GB (Tritium 1GB)
- ALL-H3-CC H5 2GB (Tritium 2GB)
Otherwise dimensions, component and port locations are identical.
The PCB has the following silkscreened on it:
Libre Computer Board ALL-H3-CC-V1.0-A
The boards are supported by both mainline U-Boot and kernels.
You can build things for yourself by following our Manual build howto and by choosing from the configurations available below.
Three build targets are provided, one for each board version:
- libretech_all_h3_cc_h2_plus_defconfig (H2+ board, since U-Boot v2018.07)
- libretech_all_h3_cc_h3_defconfig (H3 board, since U-Boot v2018.03)
- libretech_all_h3_cc_h5_defconfig (H5 board, since U-Boot v2018.07)
Three device-tree binaries are provided, one for each board version:
- sun8i-h2-plus-libretech-all-h3-cc.dtb (H2+ board)
- sun8i-h3-libretech-all-h3-cc.dtb (H3 board)
- sun50i-h5-libretech-all-h3-cc.dtb (H5 board)
Raspberry Pi model B+ compatible 40-pin, 0.1" connector with several low-speed interfaces.
|30-pin, 0.4mm connector (2x15)|
Tips, Tricks, Caveats
MicroUSB power is routed through 2A fuse (1F1). Connecting power through GPIO pins bypasses over voltage protection circuit. Each of USB-A jacks is routed through 500mA fuse (so you can not connect 1A HDD, also, you can not draw more than 500mA combined from the same dual-jack).
H2+ and H3 boards supply single 1.2V to CPU using AXP8036 (1.1V on H5), which means maximum cpu freq is limited to 1008MHz.
USB-OTG port is located in one of USB-A jacks. That's top left one on v1.0.
The U-BOOT button next the the µUSB connector triggers the FEL mode.
- UBOOT (K1)
- Power (K2), PL2
The board has three LEDs:
- Blue LED (Status), connected to the PA07 pin.
- Green LED (Power), connected to the PL10 pin.
- Red LED, connected to the VCC3V3-IR.
ESD & over-current protections
Based on the schematic Rev 1.0 (November 17, 2017) the board incorporates the following protections:
x - no protection, ESD - Electrostatic Discharge, OC - Over-current
|1||USB micro (power)||ESD||OC (2A)||Input voltage limited to 5.6V, power supply bypass|
|5||Dual USB1||ESD||OC (500mA)||Power supply bypass|
|6||Dual USB2||ESD||OC (500mA)||Power supply bypass|
|8||Ethernet||ESD||N/A||Using TVS diodes connected deferentially, over-current protection is not applicable|
|11||Audio jack||ESD||N/A||Output current is internally limited by SoC|
Locating the UART
The UART pins are located between HDMI and power jack on the board. Marked on the PCB (simplified layout: ..board-edge..GND|TX|RX. Just attach some leads according to our UART Howto.