简介

AM8268N是Actions炬力推出的一款高度集成的混合信号SoC多媒体应用处理器芯片。AM8268N内置的CPU是一个高性能、低功耗的32位RISC内核，具有DSP指令扩展，运行速度可达800MHz。
AM8268N处理器采用硬联线多格式视频解码器，支持各种主流视频格式，包括：H.264、RMVB、MPEG1/2/4和VC1。AM8268N集成图像/视频处理器和显示引擎，可提供强大的图像处理能力，如无缝放大/缩小、裁剪、旋转、颜色空间转换、伽玛校正、边缘增强、抖动、亮度、对比度和饱和度调整。此外，为其他特效扩展保留了一个可配置的FIR。两层OSD窗口可以配置为全屏大小，颜色深度从1位到32位真彩色。

AM8268N多媒体处理器支持HDMI输出，可提供优质的显示解决方案，它集成了一个512Mb DDR2  SDRAM控制器、1个USB OTG控制器、UART、I2C、SPI等接口，是一颗极具性价比的图像处理Soc单芯片。

特性

■ 32BIT RISC CORE

- 32K byte instruction cache and data cache
- F/W can program from DC up to 800MHz transparently
- DSP instruction for multi-media acceleration
- Static design allows changing clock at run-time for power saving

■视频解码器

- Multi-format supported including:
- 30 frames per second at 1920x1080 resolution for all format
- Adaptive De-interlacing

■ JPEG解码器

- Support JPEG baseline 
- Support YCbCr 4:2:0 planar and semiplanar
- Support YCbYCr & CbYCrY 4:2:2 interleaved
- Support image size: from 80x16 to 4672x3504
- Support rotate: +90° , -90°

■ 图像/视频处理器

- Image up/down scaling at arbitrary non-integer scaling ratio
- Separate scaling ratio for horizontal and vertical dimensions
- Image cropping
- Image crossing
- Image rotation, 90 180 and 270 degrees and horizontal/vertical flip
- Image mask, output image writing can be prevented on two rectangular areas
- Support YUV444/YUV422/RGB888/RGB565 for mask window for alpha blending(256 level)
- YUV/RGB conversion
- Maximum output image size up to 1920x1080

■ 显示引擎

- YCbCr/RGB conversion, user definable conversion coefficients
- Image up scaling at arbitrary non-integer scaling ratio
- Separate scaling ratio for horizontal and vertical dimensions
- brightness, contrast and saturation adjust
- Edge enhancement
- Dynamic contrast adjust
- Direct mapped Gamma correction for RGB channel separately
- 24bit to 16/18 bit Bayer pattern/1D/2D method dithering
- Support progressive and interlace input format
- Support YUV4:2:2(interleave), YUV4:2:0(semi planar), RGB565, RGB888 input forma
- 16x16 hardware cursor

■ OSD

- Two layers of OSD window with overlap
- 8 level alpha blending for each window
- 1,2,4 or 8 bits OSD bitmap data width
- Transparency pixels allowed in OSD window
- Two configurable OSD palettes
- Each one of the 2 OSD windows can fetch RGB565/ARGB8888 data from system memory directly

■ 显示接口

- HDMI Tx support, industry standard compliance HDMI 1.2
- Support output size up to 1920x1080
- Configurable horizontal sync interrupt

■ 音频

- Multi-format audio decoder:MP1/MP2/MP3/WMA/AAC/AMR-NB/WAV/PCM/ADPCM
- Build in Stereo 18-bit Sigma-Delta DAC: SNR>92db(no a-weight), 18bits,sample rate 8/12/11.05/16/22/24/32/44.1/48
- Support 32 levels volume control

■ 内存控制器

- Integrated with a 512Mb DDR2 die which is up to 1066Mbps
- OTP ROM 64bit Chip ID

■ DMA控制器

- 8 physical channels and 4 bus channels
- Stride mode support
- Software configurable priority

■ Boot ROM

- On chip boot ROM with boot loader
- The system could be loaded from SPI Nor flash

■ USB 2.0 OTG 

- Complies with Universal Serial Bus Specification. Revision 2.0.
- Complies with On-The-Go Supplement to the USB2.0 Specification Revision 1.0a.
- Supports point-to-point communication with one low-speed, full-speed or high-speed device in Host mode.
- Supports full-speed or high-speed in peripheral mode.
- Supports USB Mass Storage Class Bulk-Only Transport Revision 1.0 as host or device.
- Supports Electronic still picture imaging Picture Transfer Protocol (PTP)
- Supports direct print function using pict-bridge
- Supports Universal Serial Bus Device Class Definition for Printing Devices Version 1.1 as host
- Supports Universal Serial Bus Still Image Capture Device Definition Revision 1.0 as host
- Configurable/programmable size of endpoints.
- Configurable/programmable single, double, triple or quad buffering.
- Programmable type of endpoints.
- Supports high-speed high-bandwidth Isochronous and Interrupt transfer.
- Supports suspend, resume and power managements function.
- Support USB wakeup

■ 系统兼容

- Mac操作系统
- Windows7、Windows10、Windows11系统

■ 其他接口

- UART/I2C/SPI
- 3 external interrupts
- 41 configurable GPIO shared with function pins

■ 功耗

- 1.3v for core
- 3.3v/1.8v for IO
- Build in 1.5v bandgap reference
- Core PLL, LCD PLL,Audio PLL and DDR PLL support spread spectrum

■ 封装

- QFN 68(epad)

应用

USB转HDMI投屏器、采集卡、MST多屏异显拓展坞、USB转HDMI dongel

规格书下载

Part Number	Package	Description	Download
AM8268N	QFN 68(epad)	USB to HDMI, 800MHz SoC,HDMI TX,USB2.0,1080P60,HDCP,HDMI1.3a, support MST
AM8268B	LQFP128	Wireless Screen Reciver, 800MHz SoC,HDMI TX,USB2.0,1080P60,HDCP,HDMI1.3a, support H.264, MPEG and VC1
AM8268D	QFN 68(epad)	Wireless Screen Reciver, 800MHz SoC,512Mb DDR2,HDMI TX,USB2.0,1080P60,HDCP,HDMI1.3a, support H.264, MPEG and VC1