Question about audio DSP SPI control
Hi everyone,
I have a question about SPI communication of ADAU1446.
We control ADAU1446 with Zynq via SPI.
In high temperature (more than 85C ambient), Zynq can't control the DSP via SPI.
But, when we used Sigma Studio, the DSP was controlled by SPI of Sigma Studio.
We checked each circuit (Our DSP design and Analog Device's Eval. Board), but there is no difference
regarding DSP.
So, we suspecting current capacity of Zynq, but still we can't understand that lack of SPI current cuases this problem.
Why the SPI operates in normal at room temperature, but not at high temp.
This kind of problem can be cuased by lack of current?
Thanks,
Audio Signal Processors
sigma studio
adau1446
spi communication
SigmaDSP Audio Processors
Hi,
The ADAU1442 is rated to, and is tested at 105degC. I am sure that the SPI problem that you are encountering is caused by a component on your board that is not rated for high temperature. Does this problem appear on more than one board? Have you looked at the SPI waveforms with an oscilloscope? Or checked the quality of the power supply voltages when you are up at 85degC, also with an oscilloscope? I would suspect that maybe a capacitor somewhere on your board is having trouble.
Regards,
Coleman
This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.
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EZ Admin
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