MC68HC705P6A Datasheet, PDF (47/130 Pages) Motorola, Inc – HCMOS Microcontroller Unit

FROM RESET
Y
IS I BIT
SET?
N
IRQ
Y
INTERRUPT?
N
TIMER
Y
INTERRUPT?
N
FETCH NEXT
INSTRUCTION
SWI
Y
INSTRUCTION?
N
RTI
Y
INSTRUCTION?
N
EXECUTE INSTRUCTION
Interrupts
Interrupt Types
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
RESTORE RESISTERS
FROM STACK
CC, A, X, PC
Figure 5-1. Interrupt Processing Flowchart
5.3 Interrupt Types
The interrupts fall into three categories: reset, software, and hardware.
MC68HC705P6A — Rev. 2.0
MOTOROLA
Interrupts
Advance Information
47