Comparator0 to output PIN and back... (C8051F931)

Hi
I want wake up from sleep mode on comparator0 raising AND falling edge!
On rising edge isn't problem! Problem is on falling edge because isn't supported!
My solution (if possible):
I will try route CP0A output to external pin over crossbar and then this PIN use as PORT MATCH!
So: is this possible?

THNAKS for answers..

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