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大家好,我现在用TFP401A做项目,在相关的文档里看到如下的内容:
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.
这里是不是意味着TFP401 没有HSYNC再生电路,那401的HSYNC是怎么样的,我在网上找不到sil154 的任何数据信息,有没有sil154的替代的芯片可以对HSYNC jitter 做处理?另外有没有HSYNC 从TFP401A 输出以后的比较详实的timing ,谢谢
(3) The TFP401A incorporates additional circuitry to create a
stable HSYNC from DVI transmitters that introduce
undesirable jitter on the transmitted HSYNC signal.
这里的undesirable jitter 有没有规律?可不可以消除呢
Sil154是Silicon Image公司的产品,如果Sil154已经停产的话,可咨询Silicon是否有替代产品。Sil154的datasheet参考附件:
TFP401A的HSYNC时序关系,应该是由前级芯片(例如TFP410)决定的吧?
前级(例如TFP410)发送的 HSYNC时序关系 是啥样,TFP401A得到的 HSYNC时序关系 就应该是啥样吧
你测试的这个CH1的是HSYNC的波形?看起来非常不稳定,你可以同时测量HSYNC和VSYNC的波形做一下对比,波形类似你测试的Ch1的,但是很稳定,并且HSYNC和VSYNC的相位正好相反
如果你是HDMI的输入源,那么对于TFP401来说,为DVI输入,只能处理HDMI的视频信号,音频信号可能需要单独处理,所以TFP401应该不能满足你的需求。