AnsweredAssumed Answered

SSM2603 doesn't work at low temp

Question asked by uriy on Jun 9, 2014
Latest reply on Aug 19, 2015 by DaveThib

I am developing new device.

At this time I have 8 samples of soldered board.

Each board has SSM2603 audio codec.

In two boards codec doesn't respond on I2C line at minus 30 degree.

I am using software I2C at BF533 DSP.

At normal conditions I2C works 100% well.

I decreased SCLK of I2C from 250 kHz to 60 kHz but it has not affect at low temp.

At normal conditions and at high temp +55 all boards works fine.

BF533 has logs on UART at 500 kbit/sec and DSP works fine.

Where I have to search problem?