Rainbow Electronics 71M6542G - Manual (Page 43)

v1.1 © 2008–2011 Teridian Semiconductor Corporation 43
IRCON[1] IEX2 1 = External interrupt 2 occurred and has not been cleared:
XPULSE, YPULSE, WPULSE or VPULSE
IRCON[0] – Not used.
TF0 and TF1 (Timer 0 and Timer 1 overflow flags) are automatically cleared by hardware when the
service routine is called (Signals T0ACK and T1ACK – port ISR – active high when the service
routine is called).