MC68HC705J2 Datasheet, PDF (35/82 Pages) Freescale Semiconductor, Inc – member of the low-cost

Freescale Semiconductor, Inc.
Rev. 2
FROM
RESET
YES
INTERRUPT
MASK SET
?
NO
EXTERNAL
YES
INTERRUPT
?
NO
TIMER
YES
INTERRUPT
?
NO
CLEAR IRQ
REQUEST
LATCH.
STACK PCL, PCH, X, A, CCR.
SET INTERRUPT MASK.
LOAD PC WITH VECTOR:
MC68HC705J2 NATIVE MODE
TIMER: $0FF8, $0FF9
EXTERNAL: $0FFA, $0FFB
SOFTWARE: $0FFC, $0FFD
MC68HC05J1 EMULATION MODE
TIMER: $07F8, $07F9
EXTERNAL: $07FA, $07FB
SOFTWARE: $07FC, $07FD
FETCH NEXT
INSTRUCTION.
SWI
INSTRUCTION
?
NO
RTI
INSTRUCTION
?
NO
YES
YES
RESTORE REGISTERS
FROM STACK
CCR, A, X, PCH, PCL.
EXECUTE
INSTRUCTION.
Figure 5-3. Interrupt Flowchart
RESETS AND INTERRUPTS
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