MC9S12XF512MLM Datasheet, PDF (1032/1306 Pages) Freescale Semiconductor, Inc – S12X Microcontrollers

Chapter 22 Enhanced Programmable Interrupt Timer (S12XEPIT24B8CV1)
MOVB
MOVB
CLI
#$01,PITINTE
#$80,PITCFLMT
; enable interrupt channel 0
; enable PIT
; clear Interrupt disable Mask bit
;******************** Main Program *************************************************************
MAIN:
BRA *
; loop until interrupt
;******************** Channel 0 Interrupt Routine ***************************************************
CH0_ISR:
LDAA
MOVB
RTI
PITTF
#$01,PITTF
; 8 bit read of PIT time out flags
; clear PIT channel 0 time out flag
; return to MAIN
1032
MC9S12XF - Family Reference Manual, Rev.1.20
Freescale Semiconductor