My customer is designing ADV7280-M,at present,they can write register but can not read register.
We test supply power as below:
RESET and PWRDWN pin is pulled-up to DVDDIO.
SDA and SCL pin is pulled-up to DVDDIO by 33ohm.
use 400 kHz I2C speed
We try read form use map register 0x11,attached is time sequence,blue is SDA,yellow is SCL.
Could you give some comments/suggetions?thanks a lot!