PMD200 Data

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I am trying to get a PMD200 filter chip to work reliably in SPI program mode. Hardware mode is fine, but program mode only appears to function when there is a serial input signal present when the chip comes out of reset. Even then, it sometimes fails to program correctly at the first go.

There is nothing about this about this in the v0.6 data sheet and I am wondering if anyone who has a copy of the final version could tell me if it has any useful additional information?
 
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