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AD7997 - No ACK after LSB of configuration

Question asked by jy10 on May 20, 2016
Latest reply on May 23, 2016 by jcolao

Hello, I'm communicating with my ADC AD7997 using an Arduino Fio. I'm not getting an ACK after a write to the the LSB of the configuration register, as seen in the attached picture. As a result, my ADC is not getting configured properly (as could be seen from a subsequent read from the configuration register). All my other messages seem to be being sent fine. I'm using external 1k5 pull-ups on my board, which sits on top of the Fio (no long wires). Not sure what to try at this point...