Amlogic S905X final specifications – 64 bits and VP9 decoding


AMLOGIC S905X is an advanced application processor designed for OTT/IP Set an advanced application processor designed for OTT/IP Set Top Box (STB) and high-end media box applications. It integrates a powerful CPU/GPU subsystem, a secured 4K video CODEC engine and a best-in-class HDR image processing pipeline with all major peripherals to form the ultimate low power multimedia AP.

The main system CPU is a quad-core ARM Cortex-A53 CPU with L1 instruction/data cache for each core and a large unified L2 cache to improve system performance. In addition, the Cortex-A53 CPU includes the NEON SIMD co-processor to improve software media processing capability. The quad-core ARM Cortex-A53 CPU can be overdriven to 2GHz and has a wide bus connecting to the memory sub-system.

The graphic subsystem consists of two graphic engines and a flexible video/graphic output pipeline. The five core ARM Mali-450 GPU including dual geometry processors (GP) and triple pixel processors (PP).The multi-core GPU processor handles all OpenGL ES 1.1/2.0 and OpenVG graphics programs, while the 2.5D graphics processor handles additional scaling, alpha, rotation and color space conversion operations. Together, the CPU and GPU handle all operating system, networking, user-interface and gaming related tasks. The video output pipeline includes advanced HDR10 and HLG HDR processing, REC709/BT2020 processing, motion adaptive edge enhancing de-interlacing, flexible programmable scalar, and many picture enhancement filters before passing the enhanced image to the video output ports.

Amlogic Video Engine (AVE-10) offloads the Cortex-A53 CPUs from all video CODEC processing.  It includes dedicated hardware video decoder and encoder. AVE-10 is capable of decoding 4Kx2K resolution video at 60fps with complete Trusted Video Path (TVP) for secure applications and supports full formats including MVC, MPEG-1/2/4, VC-1/WMV, AVS, AVS+, RealVideo, MJPEG streams, H.264, H265-10, VP9-10 and also JPEG pictures with no size limitation. The independent encoder is able to encode in JPEG or H.264 up to 1080p at 60fps.

Amlogic S905X integrates all standard audio/video input/output interfaces including a HDMI2.0a transmitter with 3D, HDR, CEC and HDCP 2.2 support, stereo audio DAC, a CVBS output, PCM, I2S and SPDIF digital audio input/output interfaces, and a stereo PDM digital MIC inputs.

The processor has rich advanced network and peripheral interfaces, including a 10/100M Ethernet MAC with FE PHY interface, dual USB 2.0 high-speed ports (one OTG and one HOST) and multiple SDIO/SD card controllers, UART, I2C, high-speed SPI and PWMs.


Standard development environment utilizing GNU/GCC Android tool chain is supported. The Amlogic S905X SoC is a good solution for Android TV Box.

CPU Sub-system

  • Quad core ARM Cortex-A53 CPU up to 2GHz (DVFS)
  • ARMv8-A architecture with Neon and Crypto extensions
  • 8-stage in-order full dual issue pipeline
  • Unified system L2 cache
  • Advanced TrustZone security system
  • Application based traffic optimization using internal QoS-based switching fabrics

3D Graphics Processing Uni

  • Penta-core ARM Mali-450 GPU up to 750MHz+ (DVFS)
  • Dual Geometry Processors and triple Pixel Processors
  • Concurrent multi-core processing
  • Full scene over-sampled 4X anti-aliasing engine with no additional bandwidth usage
  • OpenGL ES 1.1/2.0 and OpenVG 1.1 support

2.5D Graphics Processor

  • Fast bitblt engine with dual inputs and single output
  • Programmable raster operations (ROP)
  • Programmable polyphase scaling filter
  • Supports multiple video formats 4:2:0, 4:2:2 and 4:4:4 and multiple pixel formats (8/16/24/32 bits graphics layer)
  • Fast color space conversion
  • Advanced anti-flickering filter

Crypto Engine

  • AES/AES-XTS block cipher with 128/192/256 bits keys, standard 16 bytes block size and streaming ECB, CBC and CTR modes
  • DES/TDES block cipher with ECB and CBC modes supporting 64 bits key for DES and 192 bits key for 3DES
  • Built-in hardware True Random Number Generator (TRNG), CRC and SHA-1/SHA-2/HMAC SHA engine

Video/Picture CODEC

  • Amlogic S905X Video Engine (AVE) with dedicated hardware decoders and encoders
  • Supports multiple “secured” video decoding sessions and simultaneous decoding and encoding
  • Video/Picture Decoding
    • VP9 Profile-2 up to 4Kx2K@60fps
    • H.265  HEVC MP-10@L5.1 up to 4Kx2K@60fps
    • H.264 AVC HP@L5.1 up to 4Kx2K@30fps
    • H.264 MVC up to 1080P@60fps
    • MPEG-4 ASP@L5 up to 1080P@60fps (ISO-14496)
    • WMV/VC-1  SP/MP/AP up to 1080P@60fps
    • AVS-P16(AVS+) /AVS-P2 JiZhun Profile up to 1080P@60fps
    • MPEG-2 MP/HL up to 1080P@60fps (ISO-13818)
    • MPEG-1 MP/HL up to 1080P@60fps (ISO-11172)
    • RealVideo 8/9/10 up to 1080P@60fps
    • WebM up to VGA
    • Multiple language and multiple format sub-title video support
    • MJPEG and JPEG unlimited pixel resolution decoding (ISO/IEC-10918)
    • Supports JPEG thumbnail, scaling, rotation and transition effects
    • Supports *.mkv,*.wmv,*.mpg, *.mpeg, *.dat, *.avi, *.mov, *.iso, *.mp4, *.rm and *.jpg file formats
  • Video/Picture Encoding
    • Independent JPEG and H.264 encoder with configurable performance/bit-rate
    • JPEG image encoding
    • H.264 video encoding up to 1080P@60fps with low latency

Video Post-Processing Engine

  • Supports HDR10 and HLG HDR processing
  • Motion adaptive 3D noise reduction filter
  • Advanced motion adaptive edge enhancing de-interlacing engine
  • 3:2 pull-down support
  • Programmable poly-phase scalar for both horizontal and vertical dimension for zoom and windowing
  • Programmable color management filter (to enhance blue, green, red, face and other colors)
  • Dynamic Non-Linear Luma filter
  • Deblocking filters
  • Programmable color matrix pipeline
  • Video mixer:  2 video planes and 2 graphics planes per video output

Video Output

  • Built-in HDMI 2.0a transmitter including both controller and PHY with CEC, HDR and HDCP 2.2, 4Kx2K@60 max resolution output
  • CVBS 480i/576i standard definition output
  • Supports all standard SD/HD/FHD video output formats:  480i/p, 576i/p, 720p, 1080i/p and 4Kx2K

Audio Decoder and Input/Output

  • S905X supports MP3, AAC, WMA, RM, FLAC, Ogg and programmable with 7.1/5.1 down-mixing
  • I2S audio interface supporting 2-channel input and 8-channel (7.1) output
  • Built-in serial digital audio SPDIF/IEC958 output and PCM input/output
  • Built-in stereo audio DAC
  • Stereo digital microphone PDM input
  • Supports concurrent dual audio stereo channel output with combination of analog+PCM or I2S+PCM

Memory and Storage Interface

  • 16/32-bit SDRAM memory interface running up to DDR2133
  • Supports up to 2GB DDR3/4, DDR3L, LPDDR2, LPDDR3 with dual ranks
  • Supports SLC/MLC/TLC NAND Flash with 60-bit ECC, compatible to Toshiba toggle mode in addition to ONFI 2.2
  • SDSC/SDHC/SDXC card and SDIO interface with 1-bit and 4-bit data bus width supporting spec version 2.x/3.x/4.x DS/HS modes up to UHS-I SDR104
  • eMMC and MMC card interface with 1/4/8-bit data bus width fully supporting spec version 5.0 HS400
  • Supports serial 1, 2 or 4-bit NOR Flash via SPI interface
  • Built-in 4k bits One-Time-Programming memory for key storage


  • Integrated IEEE 802.3 10/100M Ethernet MAC controller with 10/100M PHY interface
  • Supports Energy Efficiency Ethernet (EEE) mode
  • WiFi/IEEE802.11 & Bluetooth supporting via SDIO/USB/UART/PCM
  • Network interface optimized for mixed WIFI and BT traffic

Integrated I/O Controllers and Interfaces

  • Dual USB 2.0 high-speed USB I/O, one USB Host and one USB OTG
  • Multiple UART, I2C and SPI interface with slave select
  • Multiple PWMs
  • Programmable IR remote input/output controllers
  • Built-in 10bit SAR ADC with 2 input channels
  • A set of General Purpose IOs with built-in pull up and pull down

System, Peripherals and Misc. Interfaces

  • Integrated general purpose timers, counters, DMA controllers
  • 24 MHz crystal input
  • Embedded debug interface using ICE/JTAG

Power Management

  • Multiple external power domains controlled by PMIC
  • Multiple internal PLLs for DVFS operation
  • Multi-voltage I/O design for 1.8V and 3.3V
  • Multiple internal power domains controlled by software
  • Power management auxiliary processor in a dedicated always-on (AO) power domain that can communicate with an external PMIC
  • Multiple sleep modes for CPU, system, DRAM, etc.


  • Trustzone based Trusted Execution Environment (TEE)
  • Secured boot, encrypted OTP, encrypted DRAM with memory integrity checker, hardware key ladder and internal control buses and storage
  • Protected memory regions and electric fence data partition
  • Hardware based Trusted Video Path (TVP) , video watermarking and secured contents (needs SecureOS software)
  • Secured IO and secured clock


  • LFBGA, 13x13mm, 20×20 ball matrix, 0.65 ball pitch, RoHS compliant


Amlogic has developed this S905X as a low-cost solution, but it features VP9 decoding, so it can be a good SoC finally.

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