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我也需要一份,请发邮箱chengxg@nsechina.com
另外有个问题想求助一下您:
DVI FAQ里有这样一段话:
30. What is the difference between the TFP401 and TFP401A? The TFP401A includes HSYNC regeneration circuitry. This was required to be interoperable with the Sil154 that exhibited HSYNC jitter. However, the Sil154 is no longer on the market so most customers are now buying the TFP401
我现在使用的是TFP401A,有什么外围的芯片可以用来归整HSYNC 信号使它能够符合CCIR656 中的HSYNC 的规范,谢谢
DVI FAQ这个文档比较老了,事实上,TFP401A内部集成了抑制jitter电路,在datasheet中也提到了:
The TFP401A incorporates additional circuitry to create a stable HSYNC from DVI transmitters that introduce undesirable jitter on the transmitted HSYNC signal.
没有直接TFP401的原理图设计,其实可参考 TFP501的原理图:
http://www.ti.com/lit/an/slla134/slla134.pdf
我以前用TFP401做过一个DVI转VGA的转换器,下面是相关的资料与文档,楼主可以参考一下。如果想看原文,可以复制任意一段文字到Google中搜索:
DVI接收器选用TI公司的支持UXGA分辨率,最高输出165MHz像素时钟,支持全彩,支持每时钟输出两个像素,4倍超采样的数字接收器TFP401。
TFP401具有100个引脚,采用TQFP封装,引脚图如下所示。
图 3 TFP401引脚
DVI信号通过DVI传输线缆传送进入ZV02,结构如下所示:
图 4 DVI线缆连接方式
TFP401的配置电路图如下所示。
图 5 TFP401配置电路
TFP401支持单周期双像素输出,所以一共具有48根数据线。而在转换的过程中,不需要使用双像素输出的功能,所以只需要连接奇数像素的24根数据线即可。具体连接如下所示。