ADPD4100 SPI Reconfig

Hi Analog Devices team!

Quick question for you - I've been playing with the ADPD4100 and trying to reconfigure a few registers rapidly after a set of timeslots has completed so that different LEDs are active for timeslots A-I on the following cycle. I've initially done this with many calls to adi_adpddrv_RegWrite(), but only 1 register is reconfigured at a time, with a ~10us delay (for my MCU) between SPI writes.

When I try to increase the SPI rate by writing new values to 2 or more registers with no delay in between, it seems that the ADPD4100 exhibits odd behavior (either stops working completely or has unexpected values), even though an oscilloscope shows the same values are being written as when repeatedly calling adi_adpddrv_RegWrite().

Is there any intermediate approach that will allow one to rapidly reconfigure the device? What is the minimum time required between SPI register writes to the ADPD4100 for reconfiguration on the fly?

Thank you very much!