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ADT7320 16bit continuous mode freezes

Question asked by MonashITDF on Apr 2, 2016
Latest reply on Apr 14, 2016 by MonashITDF

ADT7320 connected to Arduino Uno shield. 16bit continuous mode programmed. Initial temperature readings are correct. After 10-15mins of operation the readings freeze to one value and all following readings are identical. Power cycling and resetting Arduino UNO cures problem. After a similar time period, fault begins to reoccur. using EVAL ADT7320 supplied on flex board.

 

Tracing SCLK and MISO on DSO shows SCLK to be consistant and correct, MISO data is static and non-changing. VDD is 3.3V, stable and clean.

 

Any suggestions...

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