MC68HC05E5 Datasheet, PDF (35/140 Pages) Freescale Semiconductor, Inc – General Release Specification

Freescale Semiconductor, Inc.
FROM
RESET
Interrupts
Timer Interrupt
IS
Y
I BIT
SET?
N
IRQ
EXTERNAL
Y
INTERRUPT?
N
TIMER
INTERNAL
Y
INTERRUPT?
N
CPI
INTERNAL
Y
INTERRUPT?
N
FETCH NEXT
INSTRUCTION.
N
SWI
INSTRUCTION
Y
?
N
RTI
INSTRUCTION
Y
?
N
EXECUTE
INSTRUCTION.
CLEAR IRQ
REQUEST
LATCH.
STACK
PC, X, A, CC.
SET
I BIT.
LOAD PC FROM:
SWI: $1FFC–$1FFD
IRQ: $1FFA–$1FFB
TIMER: $1FF8–$1FF9
CPI: $1FF6–$1FF7
SSI: $1FF4–$1FF5
M BUS: $1FF2–$1FF3
RESTORE RESISTERS
FROM STACK
CC, A, X, PC
Figure 4-1. Interrupt Processing Flowchart
MC68HC05E5 — Rev. 1.0
General Release Specification
Interrupts
For More Information On This Product,
Go to: www.freescale.com