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ADUM3153 Multiple isolators on same spi bus?

Question asked by james1111 on Dec 13, 2015
Latest reply on Dec 14, 2015 by MSCantrell

Hi,


I am experiencing problems using multiple isolators on the same spi bus. I have 8 identical circuits for ade7763's voltage monitors, which each have their own ADUM3153 isolator and own isolated psu, then the common spi bus is connected to the micro. I can happily talk to either channel 0 or ch 1, but if  more than one connected then I only see MISO on ch0 working and not ch1. Could the MISO signals as output from the isolators be contending at the same time as the !CS is not tri-stating the signals?


Thanks

James

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