• Allwinner A31s Tablet Firmware

Allwinner A31s Tablet Firmware

A31ManufacturerAllwinnerProcess40nmCPUQuad-Core ARM Cortex-A7Memory2-channel DDR3/LPDDR2, 2-channel DDR3L, maximum of 4GB total (2GB per channel)GPUSGX544ConnectivityVideoHDMI 1.4, MIPI DSI, 2-channel LVDS, 2-channel RGB LCDAudioI2S, PCMStorage4x SD Card, eMMC NAND, 2-channel raw NANDUSBOTG, 2x HostRelease DateDecember 2012WebsiteAllwinner A31 (sun6i) SoC features a Quad-Core Cortex-A7 ARM Processor SoC, and a SGX544 (with 8 shader engines) GPU from Imagination Technologies. A31 GraphA31 CPU architecture consists of quad ARM Cortex-A7 cores to deliver decent computing capability while consuming less power, and integrates the PowerVR SGX544 GPU. It also features multimedia processing unit that is capable of up to 2160p ( 4k resolution or 1080p 3D decoding) video decoding, with integrated HDMI 1.4 output support, and H.264 HP (High Profile) in 1080p at 30fps video encoding.Proper Linux support now difficult for A31 due to the GPU, though; however, its kernel source is available now and also for U-boot.Cortex-A7Cortex-A7 is 100% ISA compatible with the Cortex-A15, this includes the new virtualization instructions, integer divide support and 40-bit memory addressing. Any code running on an A15 can run on a Cortex A7, just slower.

This is a very important feature as it enables SoC vendors to build chips with both Cortex A7 and Cortex A15 cores, switching between them depending on workload requirements. ARM calls this a big.LITTLE configuration. A31sThe A31s is the same die as the A31 in a different package.