We would like to implement Close caption function into ADV7181C.
We try to enable int_maskb from register#0x50 , and we can see the reg#0x4E will be 1 , when I provided the signal with CC measage.
And we follow the user manual to read reg#0x78 = C7 than we try to get the VDP data from reg#0x79(VDP_CCAP_DATA_0) and reg#0x7A(VDP_CCAP_DATA_1) , but we only can read 0x80 from both registers.
Attached is our register setting for your reference. Can you help to check the register setting and give us some suggestion?