MC68HC05E0 Datasheet, PDF (41/96 Pages) Motorola, Inc – High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit

From
RESET
Yes
Is
I-bit set
?
4
No
INTX, RTI, Yes
or Wake-up
?
No
Timer A
Yes
?
No
Clear IRQB
Request
latch
Timer B
Yes
?
No
SI
Yes
?
No
Stack PC/X/A/CCR
Fetch
Instruction
Execute
Instruction
Set I-bit
Load PC from:
IRQB: $1FFA - $1FFB
Timer A: $1FF8 - $1FF9
Timer B: $1FF6 - $1FF7
SI: $1FF4 - $1FF5
Figure 4-3 Hardware Interrupt Flow Chart
MC68HC05E0
RESETS, INTERRUPTS AND LOW POWER MODES
MOTOROLA
4-5