I am using register 0X81 bit 4 to know if the receiver AD9880 has video input, but it is not working properly, when there is a good video input I expect this bit to be 1, and when there is no video input to be 0, after some testing I can not understand what it is wrong, but some times it is 0 some times 1 with a good video input or not.
I am doing somethinmg wrong??
which register I have to use to know if the ad9880 it is lock to a video input??
thanks in advance.