MC705P6ACPE Datasheet, PDF (34/98 Pages) Freescale Semiconductor, Inc – M68HC05 Microcontrollers

Interrupts
FROM RESET
Y
IS I BIT
SET?
N
IRQ
Y
INTERRUPT?
N
TIMER
Y
INTERRUPT?
N
CLEAR IRQ
REQUEST
LATCH
STACK
PC, X, A, CC
SET
I BIT IN CCR
LOAD PC FROM:
SWI: $1FFC, $1FFD
IRQ: $1FFA-$1FFB
TIMER: $1FF8-$1FF9
FETCH NEXT
INSTRUCTION
SWI
Y
INSTRUCTION?
N
RTI
Y
INSTRUCTION?
N
EXECUTE INSTRUCTION
RESTORE RESISTERS
FROM STACK
CC, A, X, PC
Figure 5-1. Interrupt Processing Flowchart
MC68HC705P6A Advance Information Data Sheet, Rev. 2.1
34
Freescale Semiconductor