Amlogic S805X SoC

The Amlogic S805X is a low-cost quad-core Cortex A53 64-bit ARM SOC with a Mali-450MP GPU launched in Q3 2018 and aimed at the low end of the Android TV Box market. The die is apparently the same as the S905X die but with different pad bonding to allow for a less expensive package. Specifications from the linux-amlogic mailing list:

The S805X is a variant of the Amlogic Meson GXL SoC family with the following physical limitations :
- No SDCard interface
- No GPIOCLK pins
- No USB OTG ID pin (but Gadget feature can stil be forced)
- No 5V regulator
- Reduced ADC inputs (only ADC0 and ADC1)
- GPIODV_26, GPIOAO_3, GPIOAO_4, GPIOAO_5, GPIOAO_6, GPIOX_14, GPIOX_15, GPIOH_3 are no more exposed on the package

Amlogic exposes the following SW limitations :
- HDMI max resolution should be 1080p60, VPU clock should be downgraded
- Video Decoding should be limited to 1080p60, VDEC clock should be downgraded
- CPU speed should be limited by SCPI OPP table to 1.2GHz
- DRAM interface is limited to DDR4 16bit up to 1GiB

This Amlogic PDF document has a comparison table with the S805X, S905X and S905D SOC's.
Support for the Amlogic S805X was added to the official Linux kernel starting with version 4.19, released on October 21 2018 (see the CNX-Software announcement).

The following S805X block diagram was adapted from the block diagram for the S905X SoC, since the two SoC's share basically the same die.


Note that since the ARM Cortex-A53 cores are in-order execution CPU's, they don't suffer from the vulnerabilities associated with speculative execution cores (the ominous Spectre and Meltdown vulnerabilities which affect a number of ARM cores and nearly all Intel and AMD CPU's).

S905X SoC final specifications

(these should be amended as explained above in the case of the S805X)

The Amlogic S905X is 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.


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 Unit

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 1.5L|01-PM#1.5L|01-PM up to 4Kx2K@60fps
H.264 AVC 1.5L|PH#1.5L|PH 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