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AD98xx  eval software I2C read bug when using LPT

Question asked by osaint on Jul 9, 2010
Latest reply on Feb 7, 2011 by DaveD

Hi,

 

I seems that in  DEPLEvalCustSetup.exe, used to evaluate many of AD98xx may have  the following problem :

 

In read mode , using the LPT port ,  I noticed that after the  IC received the register address , ( IC gives a ACK bit),  the  software is missing some delay before sending the new rising clock edge.  If  MSB  of  targeted register is a '1' , any I2C bus analyser will see that clock edge rising before the IC output the data to high is interpretated as  <STOP> .

 

Is it a true bug  ?    (see picture)

 

Thanks for your answers,

Steve

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