I'm attempting to measure the incoming analog video on an ADV7604. I've done this with the ADV7441 so I expected the operation to be similar. I've setup the SSPD and STDI detections to be one shot. When I trigger the detections I never see bit 7 of CP 0xb5 and bit 7 of CP 0xb1 set high. The registers indicate that there is HS and VS activity, but they never lock. I've read through the various documents, but I seem to be following the correct procedures. Any help would be appreciated.
Also, I'm a little puzzled about selecting the inputs. I'm having to set IO 0x07 to 0x68 when I want to select sync signals connected to HS_IN1 and VS_IN1 and I have to set IO 0x07 to 0x54 when I want to select sync signals connected to HS_IN2 and VS_IN2. This seems backwards to what the documentation says. Does anyone know why this would be? I've checked my connections on the board carefully.