1 General Description
1.1 Overview
The A5s family of digital media system-on-chip (SoC) solutions represents the state-of-the-art in embedded video processing. It offers ultra-low power operations while integrating an image
sensor processor (ISP), high-quality H.264 encoding/decoding, and a high-performance ARM11 CPU.
The A5s66 is the performance value member of the A5s family, delivering H.264 encoding at full HD (1920x1080p30), providing an efficient platform for 1080p IP cameras.
For IP Camera designers, the A5s family enables a low-power, small-footprint system where a rich set of peripheral I/O simplifies interconnectivity and a fully-featured SDK provides the basis for efficient product development. A high-speed image sensor interface supports a wide range of CMOS sensors, while a powerful image pipeline applies innovative processing to deliver clear images even in challenging conditions. Such innovations include 14-bit
processing, Local Exposure Correction for improved dynamic range, and 3D noise reduction using Motion Compensated Temporal Filter (MCTF) for improved low-light capabilities.
The video compression subsystem features low-delay, high-quality H.264 and MJPEG encode/decode with multiple independent video streams. Based on Ambarella's award-winning broadcast encoder technology, A5s offers industry-leading video quality at very low bitrates.
The A5s CPU is a 528 MHz ARM1136J-S that controls high-level operations and supervises the image sensor and video compression subsystems. All these computationally intensive functions are implemented in special hardware units (which can be programmed to user specifications), allowing the ARM to be free for user applications
1.2 Feature Summary
▄ ARM1136J-S Processor Core
- Clock frequency up to 528 MHz
- 16 KB Data Cache, 16 KB Instruction Cache
- Internal memory management unit (MMU)
▄ Image Sensor Processing Subsystem (iDSP)
- 3D noise reduction with MCTF
- Local Exposure Correction
- AE and AWB with histograms and statistics
- Video stabilization support
- Smooth digital zoom
- OSD with alpha-blending for text, time, logo and privacy masking
▄ Video Processing Subsystem (vDSP)
- Baseline and Main Profile H.264 @ L4.1 encode /decode
- Simultaneous1920x1080p30 and VGAp30 H.264 encode
- MJPEG at 10 fps
- JPEG processing up to 90 Megapixels/s
▄ Sensor /Video Input Interface
- Parallel interface
- MIPI CSI-2 interface, up to 3 lanes
- CCIR601 / CCIR656 video input
▄ Video Output Interface
- NTSC/PAL analog output
- CCIR601 type YUV output (16-bit mode)
- HDMI 1.3a transmitter
▄ Memory Interface
- Single 16-bit SDRAM for full feature set
- Support for DDR2 / DDR3
▄ Flexible Storage Media Interface (SMIO)
- NAND, CF, SD/MMC
- Additional SDIO interface
- Support for Micro Drive hard drive (IDE)
- NAND or USB initiated Boot
▄ I2S Audio Interface
- AAC, G.711 and G.726
▄ USB2.0 HS device supported with embedded transceiver
▄ 16-bit Parallel Host Interface to connect to optional system host
▄ General Interface Ports
- SSI/SPI interface (3)
- UART (2)
- Two wire serial interface, IDC (3)
- JTAG for debugging (1)
▄ 5 PWM control outputs
▄ 4 input ADC channels
▄ Real Time Clock (RTC)
▄ Built-in power controller for power up/down sequencing
▄ GPIO - Up to 88 GPIO pins
▄ Stepper Motor Interface (3 sets)
▄ Watchdog Timer (1)
▄ General Purpose Timers for Waveform Generation and Event Monitoring (3)
▄ 404-ball FBGA Package, 15mm x 15mm
1一般描述
1.1概述
A5s系列数字媒体片上系统(SoC)解决方案代表了嵌入式视频处理的最先进水平。 它提供超低功耗的操作，同时集成一个图像传感器处理器(ISP)，高质量的H.264编解码，高性能ARM11 CPU。
A5s66是A5s系列中的高性能成员，在全高清(1920x1080p30)下提供H.264编码，为1080p IP摄像头提供了一个高效的平台。
对于IP摄像头设计人员来说，A5s系列实现了低功耗、小占用空间的系统，丰富的外设I/O简化了互连，功能齐全的SDK为高效的产品开发提供了基础。 高速图像传感器接口支持广泛的CMOS传感器，而强大的图像管道应用创新处理，即使在具有挑战性的条件下也能提供清晰的图像。 这些创新包括14位使用运动补偿时间滤波器(MCTF)进行3D降噪，以改善弱光能力。
视频压缩子系统具有低延迟、高质量的H.264和MJPEG编码/解码和多个独立视频流。 基于Ambarella屡获殊荣的广播编码器技术，A5s以极低的比特率提供业界领先的视频质量。
A5s CPU是一个528 MHz的ARM1136J-S，控制高级操作并监督图像传感器和视频压缩子系统。 所有这些计算密集型的功能都是在特殊的硬件单元中实现的(可以根据用户的规格编程)，这使得ARM对用户应用程序是免费的
1.2功能总结
▄ ARM1136J-S处理器核心
- 时钟频率可达528 MHz
- 16kb数据缓存，16kb指令缓存
- 内存管理单元(MMU)
▄ 图像传感器处理子系统(iDSP)
- MCTF 3D降噪
- 局部曝光校正
- AE和AWB与直方图和统计
- 视频稳定支持
- 平滑数码变焦
- OSD的阿尔法混合文本，时间，logo和隐私掩蔽
▄ 视频处理子系统(vDSP)
- 基线和主配置文件H.264 @ L4.1编码/解码
- 同时1920x1080p30和VGAp30 H.264编码
- MJPEG 10帧
- JPEG处理高达9000万像素/秒
▄ 传感器/视频输入接口
- 并行接口
- MIPI CSI-2接口，最多3车道
- CCIR601 / CCIR656视频输入
▄ 视频输出接口
- NTSC/PAL模拟输出
- CCIR601型YUV输出(16位模式)
- HDMI 1.3a发射器
▄ 存储接口
- 单16位SDRAM全功能集
- 支持DDR2 / DDR3
▄ 灵活的存储媒体接口(SMIO)
- nand, cf, sd / mmc
- 附加的SDIO接口
- 支持Micro Drive硬盘(IDE)
- NAND或USB启动启动
▄ I2S音频接口
- AAC, G.711和G.726
▄ USB2.0 HS设备支持嵌入式收发器
▄ 16位并行主机接口连接到可选的系统主机
▄ 通用接口
- SSI/SPI接口(3)
- UART (2)
- 数据线串行接口，IDC (3)
- JTAG调试(1)
▄ 5个PWM控制输出
▄ 4个输入ADC通道
▄ 实时时钟(RTC)
▄ 内置电源控制器，用于上/下电排序
▄ GPIO -多达88个GPIO引脚
▄ 步进电机接口(3套)
▄ 看门狗定时器(1)
▄ 用于波形生成和事件监控的通用定时器(3)
▄ 404球FBGA封装，15mm x 15mm
A5S66技术特点概述
