|
MC68HC05SR3 Datasheet, PDF (40/96 Pages) Freescale Semiconductor, Inc – High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcontroller Units | |||
|
◁ |
From RESET
Y
Is I-bit Set?
N
IRQ External
Y
Interrupt ?
Clear
External Interrupt
Request Latch
5
N
IRQ2 External
Y
Interrupt ?
N
Timer Interrupt?
Y
PC â (SP, SPâ1)
X â (SPâ2)
A â (SPâ3)
CCâ (SPâ4)
N
Keyboard Interrupt? Y
Set I-bit in CCR
N
Load Interrupt
Vectors to
Program Counter
Fetch Next
Instruction
SWI Instruction?
Y
N
Y
RTI Instruction?
N
Execute
Instruction
Restore Registers
from Stack
CC, A, X, PC
Figure 5-2 Hardware Interrupt Processing Flowchart
Freescale
5-4
RESETS AND INTERRUPTS
TPG
MC68HC05SR3
|
▷ |