LVDS數(shù)傳接口：GMSL和FPD Link

本文介紹兩種LVDS數(shù)傳接口：GMSL和FPD Link，這兩種接口在汽車視頻傳輸方面的應(yīng)用是比較廣泛的，尤其是Camera和處理器之間的鏈路，通過STP或者同軸電纜能使整個(gè)鏈路達(dá)到15m。

1、FPD Link

Flat Panel Display Link（FPD Link）最早是National Semi提出來的一種處理器和LCD Panels之間的高速數(shù)字接口，目前已經(jīng)發(fā)展到FPD Link III了。
第一代的FPD Link可以參見NS的AN1032中的介紹（The FPD Link (Flat Panel Display Link) chipset is a family of interface devices specifically configured to support data transmission from graphics controller to LCD panels. The technology employed, LVDS (Low Voltage Differential Signaling), is ideal for high speed, low power data transfer. This enables the implementation of high end displays such as SVGA (800 x 600) and XGA (1024 x 768). ）

第二代FPD Link II可以參見TI的AN1087中的介紹（TI’s FPD-Link II family of embedded clock LVDS SerDes provide enhanced features, and improved signal quality over prior generations of FPD-Link SerDes devices for Display applications. FPD-Link II embeds the clock in the data signal and therefore uses only one differential pair to transmit both the clock and video data. This further reduces the size, weight, and cost of cables for infotainment and safety camera applications. ）

第三代FPD Link III（FPD Link III's major feature is embedding a bidirectional communication channel on the same differential pair. This bidirectional channel transfers control signals between source and destination in addition to the clock and streaming video data. Therefore, FPD Link III even further reduces cable cost by eliminating cables for control channels such as I2C and CAN bus. ）

FPD Link包括SERIALIZER和DESERIALIZER端，支持PoC，相關(guān)分類產(chǎn)品如下：

詳細(xì)的型號如下：

2、GMSL
Gigabit Multimedia Serial Links (GMSL)是Maxim公司推出的一種高速串行接口，適用于視頻、音頻和控制信號的傳輸，使用50Ω同軸電纜或100Ω屏蔽雙絞線(STP)電纜時(shí)的距離可達(dá)15m或更長。

GMSL支持PoC，分為GMSL SERIALIZER和GMSL DESERIALIZER，器件型號如下：

常用的支持FPD Link的攝像頭有Leopard Imaging公司的TI FPD-Link III系列。支持GMSL的攝像頭有Leopard Imaging公司的Maxim GMSL/GMSL2系列。除此之外還有D3 Engineering、Appro Photoelectron Inc.、舜宇等廠家也有類似的Camera Module。

除此之外還有日本THine Electronics, Inc.提出的V-by-One HS等LVDS接口，Appro Photoelectron Inc.就有相應(yīng)的產(chǎn)品。

編輯：hfy