A12A25-A2-RH,Ambarella安霸汽车视频记录摄像头行车记录仪用主控芯片SOC,DDR3,CPU,DSP,ENCODE/DECODE
DESCRIPTION
The A12A25 is an integrated system-on-a-chip (SoC) platform for automotive video camera solutions.
A12A25 chips provide a 792-MHz ARM Cortex-A9 CPU and an advanced digital signal processing (DSP) subsystem with a 64-Mpixel image sensor pipeline (ISP) and a high-definition (HD) H.264 codec engine.
KEY FEATURES
Embedded ARM Cortex-A9 792-MHz CPU
More than 480 MPixel/s processing rate 64-MPixel maximum resolution
Fish-eye lens dewarping and barrel distortion correction
Advanced motion-compensated 3D noise reduction (MCTF)
Advanced dynamic range (WDR and HDR) engine
H.264 MP/HP Level 5.1 and MJPEG codecs
Encode performance up to 1080p30, 720p60.or 720p30+VGA (or 1080p30+USB cam)
114 General Purpose Input/Output (GPIO) pins
404-pin LFBGA package (15 mm x 15 mm)
28-nm CMOS Low Power (LP) technology
1. OVERVIEW
This datasheet for the A12A25 processor from Ambarella begins with a brief introduction to the chip (Section 1.1) and a summary of key features (Section 1.2). Chapter 2 describes the A12A25 peripheral interfaces. For pin details and electrical characteristics refer to Chapter 3 and Chapter 4. respectively. See Chapter 5 for package information and Chapter 6 for Ambarella contact and ordering details.
1.1 Introductior
The A12A25 is an integrated system-on-a-chip (SoC) platform for single- and multi-channel automotive video camera solutions. A12A25 chips provide a single-core Cortex-A9 ARM CPU and an advanced digital signal processing (DSP) subsystem with a 64-Mpixel image sensor pipeline (ISP) and a high-definition (HD) H.264 codec engine. A functional block diagram of the A12A25 SoC is provided below.
The Ambarella A12A25 chip enables the capture of up to 1080p30fps resolution (single-channel) or 720p30+VGA-resolution (dual-channel) video for automotive applications.
The A12A25 chip can be used in a variety of confiqurations depending on specific application needs
Single-channel camera systems
Standalone dual-channel camera systems
Two local sensors generate two distinct inputs to the A12A25 SoC (Figure 1-2)
Figure 1-2. A12A25 Automotive Video Camera Application: Two-Channel Standalone with Two Local Sensors.
Ambarella B5-equipped camera systems
Two possible configurations:
1. Two remote sensor inputs are sent to the A12A25 SoC via the Ambarella B5F (serializer) and B5Nd (de-serializer) companion chips (Figure 1-3)
-Sensor inputs are routed through the Ambarella B5F serializer chip to the B5Nd de-serializer chip via a USB cable (up to 7.5 m) or an HDMI cable (up to 10 m)
-Note that both sensors must be the same type, and must be configured identically.
2. Inputs from both a local sensor and a remote sensor are sent to the A12A25 SoC (Figure 1-4)
-The remote sensor input is routed through the Ambarella B5F serializer chip to the B5Nd de-serializer chip via a USB cable (up to 7.5 m) or an HDMI cable (up to 10 m)
-Note that this configuration allows the use of different sensor types (e.g., HD-capable and Full-HD-capable)
(The above is the text introduction on page 1-2 of the specification)
描述
A12A25是一个用于汽车视频摄像机解决方案的集成片上系统(SoC)平台。
A12A25芯片提供792 mhz ARM Cortex-A9 CPU和高级数字信号处理(DSP)子系统,具有64万像素图像传感器管道(ISP)和高清(HD) H.264编解码引擎。
关键特性
嵌入式ARM Cortex-A9 792-MHz CPU
480mpixel /s以上处理速率64mpixel最大分辨率
鱼眼透镜变形和筒形畸变校正
先进的运动补偿3D降噪(MCTF)
高级动态范围(WDR和HDR)引擎
H.264 MP/HP 5.1级和MJPEG编解码器
编码性能可达1080p30、720p60。 或720p30+VGA(或1080p30+USB摄像头)
114通用输入/输出(GPIO)管脚
404pin LFBGA封装(15mm x 15mm)
28纳米CMOS低功耗(LP)技术
1. 概述
本数据表由Ambarella公司的A12A25处理器开始,首先简要介绍芯片(第1.1节)和概述关键特性(第1.2节)。 第2章介绍A12A25外设接口。 有关引脚的细节和电气特性,请参阅第3章和第4章。 分别。 包装信息见第5章,Ambarella联系方式和订购细节见第6章。
1.1 Introductior
A12A25是一个集成的单片系统(SoC)平台,用于单和多通道汽车视频摄像机解决方案。 A12A25芯片提供单核Cortex-A9 ARM CPU和高级数字信号处理(DSP)子系统具有64万像素图像传感器管道(ISP)和高清(HD) H.264编解码引擎。 下面提供了A12A25 SoC的功能框图。
Ambarella A12A25芯片能够捕获高达1080p30fps分辨率(单通道)或720p30+VGA分辨率(双通道)的汽车应用视频。
A12A25芯片可以根据特定的应用需求在各种配置中使用
单通道相机系统
独立的双通道摄像系统
两个本地传感器产生两个不同的输入到A12A25 SoC(图1-2)
图1 - 2, A12A25汽车摄像头应用:双通道独立与两个本地传感器。
Ambarella B5配备摄像头系统
两种可能的配置:
1. 两个远程传感器输入通过Ambarella B5F(串行器)和B5Nd(反串行器)配套芯片发送到A12A25 SoC(图1-3)
传感器输入通过USB线(最长7.5米)或HDMI线(最长10米)通过Ambarella B5F串行芯片到B5Nd反串行芯片
-注意两个传感器必须是相同的类型,并且必须配置相同。
2. 本地传感器和远程传感器的输入都送至A12A25 SoC(图1-4)
-远程传感器输入通过Ambarella B5F串行芯片通过USB电缆(高达7.5米)或HDMI电缆(高达10米)路由到B5Nd反串行芯片
-注意这个配置允许使用不同的传感器类型(例如,hd支持和full - hd支持)
(以上为规范为第1-2页文字介绍)
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