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ADAU1761 I2C access problem

Question asked by manuelkw on Sep 3, 2015
Latest reply on Sep 9, 2015 by manuelkw

Hello.

 

I tried the ADAU1761 EV Board with the USBi and it is working fine, however, when I tried to control the EVB via I2C by another simple 8-bit MCU, I have a problem, please see the picture, seems the I2C cycle cannot work to get the ACK bit from the DSP.

 

Interface voltage is 3.3V. I sent a RESET pulse to the board before starting the I2C command cycle. It cannot work even at the 1st cycle... no ACK read.

 

Any clue?

 

PicsArt_1440672393843.jpg

 

thanks & regards,

manuel

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