In our custom Design we are using ADV7340 .In one board it is working fine but in one board we are facing problem in this encoder
VDD_IO is 3.3V and VDD is 1.8V. Proper power on sequencing has been done and 1.8V rail is coming after 3.3V by 750u-sec. Still it is sending NACK on device address itself.
SDA, SCL, and ASLB pins are pulled-up to VDD_IO by 4.5k Ohm resistors. Kindly help out.