Hi Chris, I tried your suggestion and I think there is something going on with the oscilloscope results drive.google.com/open yellow is the clock, it works normally Green is the MISO line, it doesn't seem to behave well. The timing is consistent with the Logic Analyzer result, so I think maybe I have some problem with the data interpretation rather than the clock pulse timing itself. However I would like to ask the following? 1. Is it normal for the MISO line remains HIGH at the end of the transmission? The scope shows that there is a gradual decay of the last MISO pulse and this seems wierd to me. The gradual decay cause the system to see the MISO lines remains HIGH after the transmission ends. 2. The MISO line starts abit above ground then goes abit below ground when pulsing. Is this normal? Thanks, Khoi Ly
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