MC68HC705P9 Datasheet, PDF (63/156 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Resets and Interrupts
Interrupts
UNSTACKING
ORDER
5
1
4
2
3
3
2
4
1
5
•
•
•
CONDITION CODE REGISTER
ACCUMULATOR
INDEX REGISTER
PROGRAM COUNTER (HIGH BYTE)
PROGRAM COUNTER (LOW BYTE)
$00C0 (BOTTOM OF STACK)
$00C1
$00C2
•
•
•
STACKING
ORDER
•
•
•
•
•
•
$00FD
$00FE
$00FF (TOP OF STACK)
Figure 6. Interrupt Stacking Order
Table 4. 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/V_PP 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 programmable in the mask option register.
9-mc68hc705p9
MOTOROLA
Resets and Interrupts
63