Libre Computer, a project initiated by Shenzhen Libre Technology Co., Ltd., with the goal of producing standards-compliant single-board computers (SBC) and upstream software stack to power them. Libre Computer Project uses crowd-funding on Indiegogo and Kickstarter to market their SBC designs.
Libre Computer Board AML-S905X-CC is designed as a hardware alternative for the Raspberry Pi 3 Model B (does not share same software) and offers faster performance, more memory, lower power, higher IO throughput, 4K capabilities, open market components, improved media acceleration, removal of the vendor locked-in interfaces, and Android 7.1 and Android 8.0 support.
This platform uses the latest technologies and is built upon proven long term available chips. It is supported by upstream Linux and has a downstream development package based on Linux 4.9 LTS that offers ready-to-go 4K media decoding, 3D acceleration...
This platform uses the latest technologies and is built upon proven long term available chips. It is supported by upstream Linux and has a downstream development package based on Linux 4.9 LTS that offers ready-to-go 4K media decoding, 3D acceleration, and more. This platform offers better performance than Raspberry Pi 3.
You are seeing the chip-set with no boot image. You need to download a newer image and reflash the micro-SD card.
For the 40-pin header found on Libre Computer Boards, all GPIOs are 3.3V logic level meaning that they use 3.3V or 0V to represent digital 1 or 0 respectively. It is the same voltage as Raspberry Pi but different than some Arduino boards. Some Arduinos use 5V.
GPIOs have limited signaling/frequency throughput depending on what software interface is used.
- Userspace software using file interface can operate on the n-KHz frequency
- Userspace software using ioctl or registers can operate on the nn-KHz to nnn-KHz frequency
- Kernel driver can usually can operate on the n-MHz frequency
- Kernel driver with accelerated fixed function hardware on specific pins can operate on the nn-MHz frequency
GPIO signaling/frequency will be further limited if current requirement is high.