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MM912J637 - Interrupt on PTB3/L0 going high - possible?

Question asked by Ian Wilson on Sep 25, 2013
Latest reply on Oct 3, 2013 by Ian Wilson

Hi all,


The MM912J637 has only one external interrupt possibility that I can see; PTB3/L0 can force a wake-up when the device is asleep.


What I want to know, though, is whether I can get an interrupt when this pin goes high even though the device is *already* awake.


I have tried but I am not getting a hit on the D2D interrupt with the expected interrupt vector value of 0x00.  I don't think I have a bug in the code but it is feasible.


If this is a limitation in the chip, it sort of half makes sense, but it is a significant limitation for me.  Not having an external interrupt has unpleasant repercussions throughout our system.


Is it feasible to fudge this using a Timer channel with a suitable capture configuration to generate interrupts on edges of PTB3?