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Grouping GPI for readback with interupt GPO

Question asked by Brettcoupe on Aug 2, 2014

Hi I am using the ADAU 1442 in a NON standalone application

I want to use the GPO pins  to be readback into the MCU as a kind of I/O expander for the MCU

I would Prefer that all GPI inputs are accumulated into a single Readback resister and a GPO gets set when ever there is a Change to this register as an Interrupt to the MCU.


Is there any examples available for this?