S912XEP100J5MAG Datasheet, PDF (675/1324 Pages) Freescale Semiconductor, Inc – Features of the MC9S12XE-Family are listed here. Please see Table D-2.for memory options and Table D-2. for the peripheral features that are available on the different family members.

Chapter 17 Periodic Interrupt Timer (S12PIT24B8CV2)
MOVB
MOVB
CLI
#$01,PITINTE
#$80,PITCFLMT
; enable interupt channel 0
; enable PIT
; clear Interupt disable Mask bit
;******************** Main Program *************************************************************
MAIN:
BRA *
; loop until interrupt
;******************** Channel 0 Interupt 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
MC9S12XE-Family Reference Manual Rev. 1.25
Freescale Semiconductor
675