概述

　　车载娱乐系统，简称车机，实现了人与车，车与外界的信息互联互通，实现车辆信息如胎压，空调，收音机，娱乐，导航的显示，提高驾驶人员对车况，车内环境的了解。实现车内多个设备通讯需要多路CAN，本身作为车载产品车规认证也是必不可少的。本方案介绍了瑞萨RH850F1L系列集成4路CAN。器件通过AEC-Q100车规级认证，符合ISO26262 ASIL-B，使得系统运行更安全可靠。

　　器件优势

　　· 瑞萨32bitMCU RH850/F1L， 集成4路CAN，可以同时与HUD，仪表实现多方通讯;功能安全符合ISO26262 ASIL-B认证符合前装要求;有PIN2PIN支持CAN-FD(RH850/F1K)产品做后盾解决了后续升级CAN-FD的后顾之忧，降低了系统成本，安全稳定可靠。

【RH850/F1L】

he in-vehicle high-end microcomputer which was the best for body application and had the lineup which can respond to a variety of Systems

The RH850/F1L is a product line in Renesas' RH850/F1x series of single chip microcontrollers designed for automotive body applications. The embedded flash memory will range from 256 KB to 2 MB and packages will be covered from small package 48 pin to 176 pin.

Key Features:

Pin count – Memory size Lineup:

Program Flash
SRAM

Block Diagram:

　　· 京瓷汽车级无源晶振 ，8-16MHZ汽车级晶体晶振 ，主流汽车主RENESAS,NXP,TI,ATMEL等主流厂家官方推荐晶振型号,汽车级AEC-Q200认证，工作温度:-40-150℃，全球唯一一家晶体晶振厂家从能从材料端-陶瓷底座-导电胶-封装最终产品，可以为中国客户免费做电容匹配。

　　· Intersil 视频处理芯片TW8836，以单芯片和基于硬件的解决方案，提供支持多种模拟和多种数字视频格式使产品设计更加灵活。通过AEC-Q100认证相比同类产品成熟稳定。

【TW8836】

Key Features

Analog Video Decoder

NTSC (M, 4.43) and PAL (B, D, G, H, I, M, N, N combination), PAL (60), SECAM with automatic format detection

Three 10-bit ADCs and analog clamping circuit

Fully programmable static gain or automatic gain control for the Y or CVBS channel

Programmable white peak control for the Y or CVBS channel

Software selectable analog inputs allow composite, S-video, analog YPbPr, or RGB

High quality adaptive 2D comb filter for NTSC/PAL inputs

PAL delay line for color phase error correction

Image enhancement with 2D dynamic peaking/CTI

Digital subcarrier PLL for accurate color decoding

Programmable hue, brightness, saturation, contrast, sharpness

Selectable differential or single-ended CVBS input

Digital horizontal PLL and advanced synchronization processing for VCR playback and weak signal performance

High quality horizontal and vertical filtered-down scaling with arbitrary scale-down ratio

Up to 2CH differential or 4CH single ended CVBS input

Supports detection of Macrovision copy protection

Analog RGB Inputs

Triple high speed 10-bit ADCs with clamping and programmable gain amplifier

SOG and H/VSYNC support for YPbPr or RGB input

Built-in line locked PLL with sync separator

Supports input resolution up to 1080p

Digital Inputs Support

Supports both BT.656 and 601 video formats

Supports YCbCr/RGB 24-bit input (bidirectional) up to 1080p resolution

Single channel LVDS input up to 720p resolution

Supports RGB 565 + BT.656 at the same time

TFT Panel Support

Built-in programmable timing controller

Supports 3, 4, 6 or 8 bits per pixel up to 16.8 million colors with built-in dithering engine

Supports digital panels (TTL) or single channel LVDS panels up to WXGA (1366x768) resolution, 85MHz

Supports serial (8-bit) RGB panel

Font Based On-Screen Display

Eight window font OSD with bordering/shadow

10kB programmable font RAM and 512 display RAM

1/2/3/4 bits/pixels

Supports variable width (12/16), height (2~32)

SPI Flash Based On-Screen Display

9 bitmap based OSD windows in 2 layers through SPI with alpha blending between layers

Supports 4/6/8 bits/pixels

Supports RLE decompression for two windows

Image Processing

High quality scaler with both up/down and panorama/water-glass scaling support

Built-in 2D deinterlacing function

Programmable brightness, contrast, saturation, hue and sharpness

Programmable color transient improvement control

Supports programmable cropping of input video and graphics

Independent RGB gain and offset controls

DTV hue adjustment

Programmable 8-bit gamma correction for each color

Black/white stretch

Clock Generation

Spread spectrum profile based on triangular modulation with center spread

Programmable modulation frequency and spread width

Timing Controller (TCON)

Supports programmable interface signals for control

Column (source) driver/row (gate) driver

MCU

Industry standard 8052 based

Code fetch from external SPI flash memory

256B code cache

2k XDATA memory

Supports power save mode with 32k internal clock

ISP (In System Programming) through I2C

Supports 24-bit addressing

Miscellaneous

Supports Fast mode I2C interface up to 400kHz

Short diagnostics

Short-to-battery

Short-to-ground

Up to 4 PWMs

GPIOs

1.8V/3.3V internal operation

1.8V I/O support

Power-down mode

Single 27MHz crystal

128 Ld LQFP with exposed thermal pad and 172 ball TFBGA package

TW8836AT-LB2-GE is AEC-Q100 qualified

Description

The TW8836 is a highly integrated LCD video processor that incorporates many of the features required to create a multipurpose LCD display system into a single package. This includes a high quality, 2D comb NTSC/PAL/SECAM video decoder, triple high-speed RGB ADCs, an LVDS and TTL digital input interface, high-quality scaler and deinterlacer, as well as a versatile OSD, high-performance MCU and LVDS or TTL output panel interface. The TW8836 can support input resolutions up to 1080p and can drive LCD panels at resolutions up to 1366x768. The TW8836’s video processing capability includes arbitrary H/V scaling, panoramic scaling, image mirroring, image adjustment and enhancement, black and white stretch, etc. The feature set and versatility of this device makes it an ideal solution for in-car LCD display applications, as well as portable display applications such as pico projectors.

Applications

In-car display

Pico projector and portable media player

Portable DVD and DVR players

　　· Silicon labs Tuner Si4792x 系列，集成 AM/FM 收音机接收器和音频处理器，使用最少的外部清单物料、具最高集成度的单片。使用最低的成本达到最好的效果。同时该芯片通过AEC-Q100汽车认证。

【Si4792x 】

Si4792x 高性能汽车 AM/FM 收音机和 HD Radio™ 调谐器，带有音频系统

Si47920/Si47921 将 AM/FM 收音机接收器和音频处理结合在一起。模拟 AM/FM 接收器为汽车广播接收设立了一项新标准。集成的音频处理子体系提供一个完整解决方案，用于在主单元中同步、处理、聚集和分布数字和模拟音频信号。

Si47920/21 系列是业内使用最少的外部清单物料、具最高集成度的单片 IC。基于 Si47920/21 系统可测量低成本的单个调谐器 AM/FM 收音机至配备多个调谐器及多个天线的最高性能系统，使收音机供应商使用一个通用软件 API，即可跨越多条生产线重新利用研发。Si47920/21 达到严格的汽车质量标准。

特点

全球 FM 波段支持 (64–108 MHz)

全球 AM 波段支持 (520–1710 kHz)

长波波段支持 (144–288 kHz)

短波波段支持 (2.3–30 MHz)

芯片上软决策 RDS/RDBS 解调器/解码器

AM/FM：

综合的 AM/FM 信号处理固件

后台/数据调谐器的集成式有源 FM 缓冲器

具有两个、三个或四个调谐器的模拟 FM 相位差异(仅针对 Si47921)

针对 AM 和 FM 输入的完全集成式 AGC

高清收音机：(仅针对 Si47921)

连接高清收音机处理器的数字 I/Q 接口

AM/FM 高清收音机 IBOC 混合

快速 FM 高清收音机波段扫描

音频：

具有 288 kB 程序和数据内存的 Tensilica HiFi EP 音频 DSP

七个模拟音频输入

四个模拟音频输出

五个数字音频端口 (I2S)

多达 24 个同步和异步采样速率转换器

多频道音频参考设计

具有完全集成 PLL-VCO 的频率合成器

集成时钟振荡器

1.8 V 或 3.3 V 数字电源

3.3 V 模拟电源和 1.8 V 数字电源

12x12x0.85 mm 、84 引脚的 QFN

符合无铅/RoHS 要求

符合 AEQ-Q100

　　【车载主机】

　　车载主机是车载影音系统的核心部分，主要功能是播放音源，相当于家庭影院的影碟机。不过为了更适合汽车内空间狭小的特点，车载主机经常带有一定的功放能力，如果对扬声器要求不是太高，就不再需要外接功放，可以比较更简便的组成影音系统。

　　Features• Ideally suited for load dump protection• Plastic package has Underwriters LaboratoryFlammability Classification 94V-0• High temperature stability due to unique oxide passivationandpatented PAR®construction• Integrally molded heatsink provides a very low thermalresistance for maximum heat dissipation• Low leakage current at TJ= 175°C• High temperature soldering guaranteed:260°C for 10 seconds at terminals• Meets ISO7637-2 surge spec.• Low forward voltage drop具体一些讲，主机的作用包括：1、音调调节，统一协调高、中、低不响度调节，对于一些响度不够的信号，主机负责适度予以补充，使声同频率范围的信号，使之更加协调。2、音更丰满;3、内置均衡，针对不同风格的音乐设置不同的频率增益补充，例如您在面板上按下了“ROCK”键，那么主机将加强低音和高音，突出摇滚的感受。

　　汽车音响主机的分类方法多种多样，目前最普遍的方法是按照信号源分类。主机的信号源主要有：收音(FM/AM)、磁带、蓝牙、CMMB数字电视、MP5、CD、VCD、DVD和MP3等。将这些声音源分类组合，可以生产出不同款式的音响主机，最常见的就是收音、磁带和CD的三合一机型，当然还有MP3、磁带和收音等组合方式，但是那就比较少见了。

　　车载影音大多是专车专用的，除了放影碟，插u盘，sd卡等外，还可以插导航卡进行路径模拟导航，还有更丰富的娱乐游戏!我相信以后汽车的主流都会带有车载影音的!