I'm using the AD5252 digital potentiometer. After executing a command STORE TO EEMEM command START I2C interface responds with an ACK immediately. Why?
strange.... anyway, the conclusion,
It appears to be a time delay thing. I delayed the process of interface polling by 14 ms. I can see the I2C interface is now disabled at this point in time and eventually returning to the enabled state. As you can see in the included file of first posting, if interface polling is applied too early, I get an acknowledgement and it also has the effect of canceling the previous EEMEM write.