Прошивка allwinner a20 скачать![]() Overview.A20 CPU consists of dual ARM Cortex-A7 cores, and integrates the Mali400 MP2 GPU. Together with Cedar Engine multimedia processing unit that is capable of up to 2160p ([email protected] 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. Main components of the A20. CPU: Dual-Core ARM Cortex-A7 1GHz Processor (r0p4, rev >[1] : FPU: standard ARM VFPv4-D32 FPU Floating Point Unit SIMD: NEON (ARM's extended general-purpose SIMD vector processing extension engine) GPU: Mali400 MP2 VPU: Cedar Engine (V >Cortex-A7. Cortex-A7 is 100% ISA compatible with the Cortex-A15, this includes the new virtualization instructions, integer div >[2] [3] [4] Virtualization. Cortex A7 and A15 includes hardware virtualization support. On the kvm branch of kernel.org, there is description of Cortex-A15 Virtualization extensions VGIC registers : After the ARM Cortex-A7 documentation: GIC memory MAP on Cortex-A7 [5] : Virtual Maintenance Interrupt (PPI6) [6] 2 virtual interrupt signals, nVIRQ and nVFIQ [7] With MMU-400, Intermediate Physical Address (IPA) ca be used by guest OS [8] A20 SoC Features. CPU ARM Cortex-A7 Dual-Core (revision r0p4) 256KiB L2-Cache (shared between two cores) 32KiB (Instruction) / 32KiB (Data) L1-Cache per core SIMD NEON, VFP4 Virtualization Large Physical Address Extensions (LPAE) 1TB GPU ARM Mali400 MP2 Featuring 1 vertex shader (GP) and 2 fragment shaders (PP). Complies with OpenGL ES 2.0 Memory LPDDR2/DDR3/DDR3L controller NAND Flash controller and 64-bit ECC V > Documentation. Allwinner A20 Manual v1.40 (PDF, 857 pages, 2015-04-20) Allwinner A20 Datasheet v1.50 (PDF, 36 pages, 2015-04-06) A20 Product Brief (Outdated) A20 User Manual (Outdated v1.0) The A20 SoC supports dynamic voltage & frequency scaling. Below are the DVFS operating points, as documented in the A20 SDK (lichee-v2.0.tar.gz): Software. Original SDKs. We have made some SDKs available on our server: | |
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