方案描述：

MSA3Z173系列芯片是Mstar推出的极富竞争力的DVB-T2机顶盒FTA方案，芯片内置128MB DDR3和T2解调器，支持T2 1.4规范，支持H.265，MPEG高清视频，支持PVR/Timeshit功能，支持各种多媒体功能，支持常规OTT应用，方案的集成度高，设计精简，面向亚洲、欧洲、非洲等主流的DVB-T2市场。

方案关键器件表

类型：DDR2                    型号：NT5TU64M16GG-AC                厂商：NANYA · 南亚

类型：Si Tuner                型号：RT534                                        厂商：RAFAEL · 宏观微

类型：Si Tuner                型号：R836                                          厂商：RAFAEL · 宏观微

类型：解调器                   型号：MSB1241                                   厂商：Mstar · 晨星

类型：SPI Flash               型号：EN25Q32C                                 厂商：EON · 宜扬

类型：高清机顶盒            型号：MSA3Z173-Z00-DA0                 厂商：Mstar · 晨星

方案详情

一、方案特点：

完全兼容 DVB-T2

接收频段：174~862MHz (支持VHF波段、UHF波段)

支持6, 7 & 8 MHz带宽

支持2K/8K FFT 模式, COFDM 解调功能

支持自动搜台，手动搜台

视频支持格式：MPEG-1, MPEG-2 Main Profile @ Main Level(HD), H.264 MP @ Level 3 (HD) , HEVC(H.265) High Tier@Levdl, Div3.X ,4.0, 5.0, 6.0 decoder

支持576i, 576P, 720i, 720P, 1080i ,1080P分辨率输出

支持Auto, 16:9 wide screen, 4:3 letter box, 4:3 pan scan宽高比输出

PAL/NTSC 制式自动切换

多国语言支持:英语、法语、德语、阿拉伯语、葡萄牙语、土耳其语、西班牙语、波兰语、意大利语等

FTA节目接收

支持7 天 EPG

支持电子图文及多语言字幕

支持USB录制、多媒体及软件升级功能

支持HDMI v1.4版本

杜比音效(可选)

支持SPDIF接口输出(可选)

支持SCART 接口输出(可选)

支持YPbPr接口输出(可选)

支持OTT：WEATHER，FTP，GOOGLEMAP，RSS，NEWS，YOUTUBE，IPTV，SATIP，DLNA

二、方案展示

芯片架构图：

方案框图：

功能描述：

平台支持DVB标准，接收频段174~862MHz (支持VHF波段、UHF波段)，支持6, 7 & 8 MHz带宽。

视频播放支持对MPEG2/H.264广播级的SD/HD码流解码，音频部分支持对MPEG 音频， Dolby AC-3 /E-AC-3的解码。

平台多媒体部分功能强大，支持对主流格式的多媒体文件的播放，支持对常见格式图片的播放，支持对刻录文件的回放。

支持对电视的实时刻录，定时刻录，支持看A频道录B频道，支持时光平移功能等机顶盒应用功能。

多国语言支持:英语、法语、德语、阿拉伯语、葡萄牙语、土耳其语、西班牙语、波兰语、意大利语等

核心优势：符合DVB数字电视标准，功能完善，集成度高，设计精简，性价比高。

方案关键器件描述

NT5TU64M16GG-AC描述：

The 1giga bit (1Gb) Double-Data-Rate-2 (DDR2) DRAMs is a high-speed CMOS Double Data Rate 2 SDRAMcontaining 1,073,741,824 bits. It is internally configured as an octal-bank DRAM.

The 1Gb chip is organized as 32Mbit x 4 I/O x 8 bank, 16Mbit x 8 I/O x 8 bank or 8Mbit x 16 I/O x 8 bank device. Thesesynchronous devices achieve high speed double-data-rate transfer rates of up to 1066 Mb/sec/pin for general applications.

The chip is designed to comply with all key DDR2 DRAM key features: (1) posted CAS with additive latency, (2) writelatency = read latency -1, (3) normal and weak strength data-output driver, (4) variable data-output impedanceadjustment and (5) an ODT (On-Die Termination) function.

All of the control and address inputs are synchronized with a pair of externally supplied differential clocks. Inputs arelatched at the cross point of differential clocks (CK rising and
 falling). All I/Os are synchronized with a single endedDQS or differential DQS pair in a source synchronous fashion. A 13 bit address bus for x4/x8 organized componentsand A 12 bit address bus for x16 component is used to convey row, column, and bank address devices.

These devices operate with a single 1.8V ± 0.1V power supply and are available in BGA packages.

RT534描述：

The RT500 series RF modulators are designed for use in set-top boxes, and similar devices. Theysupport multiple standards (B/G, I, D/K, M/N, L), and can be programmed to support PAL, SECAM,and NTSC formats. The devices are programmed by a high-speed I2C Bus. RT500 modulators useinternal PLL with on-chip LC tank covers the full VHF & UHF range by internal frequency divider andadvance spurious rejection technique to rejection unwanted harmonic with typical 40dBc range.On-chip LNA can realize Loop-Through function tosummary or bypass antenna TV signal. AudioAM/FM modulations in RT500 are realized by sound subcarrier oscillator, it covers all broadcaststandards (4.5/5.5/6.0/6.5MHz).

The RT534 series RF modulators are designed at the special mode for NTSC ch3/4 from RT500architecture. It also simplifies by eliminating I2C control to 2 pin switch control.

All devices are available in a 20-pin QFN, Pb-free package.

R836描述：

In heritage from Rafael Micro’s state-of-the-art architecture, the R836 DTV silicon tuner, no need for external RF balun,can achieve best linearity with lowest power consumption. R836 offers unmatchable RF performance for all digitalbroadcast television standards including DVB-T/T2/C, J.83B, ATSC, DTMB and ISDB-T/C. With innovative AccuTuneTMand TrueRFTM mechanisms, R836 provides superior performance in sensitivity, linearity, adjacent channelimmunity, and image rejection. The chip embeds a smart tracking filter and power detector to optimize different inputchannels and power scenarios as well as the spurious freedynamic range.

The R836 is a highly integrated silicon tuner that builds in low noise amplifier (LNA), mixer, fractional PLL, VGA, voltageregulator and tracking filter, eliminating the need for external SAW filters, LNA and RF Balun. High performance LNA, andsmall package enable R836 the perfect solution for both cost and performance sensitive applications.

With proprietary GreenRF techniques, R836 achieves both high performance and the lowest power consumption whichperfectly compliant with the worldwide trend. The R836 comes in a small and thin QFN RoHs compliant package.

R836参数

支持标准： ATSC / DVB-T2 / DVB-T / ISDB-T / DTMB-T

环路： Embedded

工艺： 0.18um

MSB1241描述：

The MSB1241 is a single chip demodulator supporting DVB-T2, DVB-T and DVB-C standards. The deviceintegrates a house keeping microcontroller that takes care of all real time and algorithmic tasks simplifying thehost control interface.

The MSB1241 front end can accept tuners that provide IF or low IF output. A high rejection channel filter hasbeen included easing the channel filtering requirement of the tuner whilst still meeting the stringent requirementsfor adjacent channel interference. The MSB1241 may be clocked directly using a crystal, typically 24MHz.

The MSB1241 is capable of blind acquisition of DVB-T/T2 and DVB-C signals. All parameters may be detected inthis mode enabling fast and accurate auto scanning. Its frequency recovery circuit is able to compensate for alltypical tuner and broadcast frequency errors.