GS2970

概览

Please use GS2970A and GS3470 for new designs.

The GS2970 is a multi-rate SDI receiver which includes complete SMPTE processing, as per SMPTE 425M, 292M and SMPTE 259M-C. The GS2970 also performs audio-dembedding and integrates an audio clock generator.

The SMPTE processing features can be bypassed to support signals with other coding schemes.The device features an integrated reclocker with an internal VCO and a wide Input Jitter Tolerance (IJT) of 0.7UI.

它提供了串行数字环通输出，可配置为输出时钟恢复或非时钟恢复串行数字数据。串行数字输出可连接至外部电缆驱动器。

此器件以四种基础模式运行：SMPTE 模式、DVB-ASI 模式、Data-Through 模式或待机模式。

In SMPTE mode, the GS2970 performs full SMPTE processing, and features a number of data integrity checks and measurement capabilities.

本器件还支持辅助数据提取，并可通过主机可访问的寄存器提供完整的辅助数据包。此外，本器件还提供各种其他数据包检测和错误处理功能。所有这些处理功能均为可选，可通过寄存器编程单独启用或禁用。

Both SMPTE 425M Level A and Level B inputs are supported with optional conversion from Level B to Level A for 1080p 50/60 4:2:2 10-bit.

在 DVB-ASI 模式中，将 8b/10b 解码应用至接收到的数据流。

在 Data-Through 模式下，将禁用所有形式的 SMPTE 和 DVB-ASI 解码，此器件可用作简单的串联-并联转换器。

本器件也可在功耗较低的待机模式下运行。在这种模式下，不会执行任何信号处理，且并联输出保持静态。

Parallel data outputs are provided in 20-bit or 10-bit format for 3Gb/s, HD and SD video rates, with a variety of mapping options. As such, this parallel bus can interface directly with video processor IC's, and can be multiplexed onto 10 bits for a low pin count interface.

Up to eight channels (two audio groups) of serial digital audio may be extracted from the video data stream, in accordance with SMPTE 272M-C and SMPTE 299M.

The output signal formats supported by the device include AES/EBU and I2S, and two other industry standard serial digital formats. A variety of audio processing features are provided to ease implementation. Necessary audio clocks are directly generated and provided by the device.