To GuenterL,
First of all, thank you very much.
For the problem of clock output, I checked my PCB design, and found that EPAD was not connected to the ground!!! Then I made it. Now, the output clock is correct, about 74.25MHz. I checked the 0x9e[4], and the result was 1. That means PLL clocked.[PS: this kind of E PAD design is really confusing, since many chips use this kind of pad under the chip to transfer heat. I just paid NO attention to that! ]
After that, I tried to get the state of 0x3d and 0x3e. The result shows that both of two value indicate the same Input format: 1080_60i, which is the real input source.
So, I think next work is to configure related registers to get correct output.
I scanned your attachment above. In my case, should I refer to 6-1e(Port A, 720p,1080i YPrPb 444 in, RGB 444 out, Through HDMI (Fast Switching)VIC[4,5,19,20]) and 6-1f (Port A, 1080p YPrPb 444 in, RGB 444 out, Through HDMI (Fast Switching)VIC[16,31,32])?
Anyway, thanks again!
Smilence