Hello,
I have trouble communicating with CDCM6208 component using I2C. I have the acknowledgement with difficulties (I would say that 9 times out of 10 I did not receive this ack).
Configurations SI_MODE is at '01'. My supply ramp is relatively fast (lower than 1ms) so I left pin PDN floating. AD0 and AD1 are respectively connected to pull-up and pull-down through 10kohms (so I2C address is 0x55 and noise should not be a problem using 10k). All voltages are 3.3V like I2C lines.
Reset (pin 44) is asserted low during the whole initialisation phase. It will be deasserted (high) when a FPGA is ready to communicate with the component (so long after start-up phase).
Can you support me and indicate me where the problem is located?
Many thanks.
