ADV7340 is sending NACK on I2C

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.

Parents Reply Children
No Data