MC68HC05P9A Datasheet, PDF (57/158 Pages) Freescale Semiconductor, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Resets and Interrupts
Interrupts
UNSTACKING
•
ORDER
•
•
$00C0 (BOTTOM OF STACK)
$00C1
$00C2
•
•
•
5
1
4
2
3
3
2
4
1
5
CONDITION CODE REGISTER
ACCUMULATOR
INDEX REGISTER
PROGRAM COUNTER (HIGH BYTE)
PROGRAM COUNTER (LOW BYTE)
STACKING
ORDER
•
•
•
•
•
•
$00FD
$00FE
$00FF (TOP OF STACK)
Figure 22. Interrupt Stacking Order
Table 14. Reset/Interrupt Vector Addresses
Function
Source
Local Global Priority
Mask Mask (1 = Highest)
Vector
Address
Reset
Power-On
RESET Pin
COP Watchdog⁽¹⁾
None
None
None
None
1
1
$1FFE–$1FFF
1
Software
Interrupt
(SWI)
User Code
None
None
Same Priority as
Instruction
$1FFC–$1FFD
External
Interrupt
IRQ Pin
None I Bit
2
$1FFA–$1FFB
Timer
Interrupts
ICF Bit
OCF Bit
TOF Bit
ICIE Bit
OCIE Bit I Bit
TOIE Bit
3
$1FF8–$1FF9
1. The COP watchdog is a mask option.
13-mc68hc05p9a
MOTOROLA
Resets and Interrupts
57
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