MC68HLC908QY4 Datasheet, PDF (111/182 Pages) Motorola, Inc – Microcontrollers

MODULE
INTERRUPT
I BIT
ADDRESS BUS
DATA BUS
R/W
MODULE
INTERRUPT
I BIT
ADDRESS BUS
DATA BUS
R/W
Exception Control
DUMMY
SP
SP – 1 SP – 2 SP – 3 SP – 4 VECT H VECT L START ADDR
DUMMY PC – 1[7:0] PC – 1[15:8] X
A
CCR V DATA H V DATA L OPCODE
Figure 13-8. Interrupt Entry
SP – 4 SP – 3 SP – 2 SP – 1
SP
PC
PC + 1
CCR
A
X
PC – 1[7:0] PC – 1[15:8] OPCODE OPERAND
Figure 13-9. Interrupt Recovery
CLI
LDA #$FF
BACKGROUND ROUTINE
INT1
PSHH
PULH
RTI
INT1 INTERRUPT SERVICE ROUTINE
INT2
PSHH
PULH
RTI
INT2 INTERRUPT SERVICE ROUTINE
Figure 13-10. Interrupt Recognition Example
MC68HLC908QY/QT Family Data Sheet, Rev. 3
Freescale Semiconductor
111