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AD9984A I2C issue - NACK

Question asked by SergeyM on Jul 15, 2015
Latest reply on Jul 16, 2015 by GuenterL

Hello

 

I've a custom board based on AD9984A and CPLD which uses I2C protocol to configure. I'm trying to set first registers ( x01, x02, x03 for example) but I only get an ACK after accessing register 0x02

 

Here is a screenshot from LA:

 

i2c.jpg

and decode of I2C protocol:

i2c_la.jpg

 

I thought it maybe because of some clock stretching issues in case of AD9984A doesn't has time to complete the transmission. Though I've added delay cycles between bytes - but results are the same.

 

With best regards, Sergey

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