Preliminary
SN8P1702A/SN8P1703A
8-bit micro-controller build-in 12-bit ADC
ꢁExample: How does users check the interrupt request in multi-interrupt situation?
ORG
8
; Interrupt vector
B0XCH
B0MOV
B0MOV
A, ACCBUF
A, PFLAG
PFLAGBUF, A
; Store ACC value.
;
INTP00CHK:
INTTC0CHK:
INTTC1HK:
INT_EXIT:
; Check INT0 interrupt request
; Check P00IEN
; Jump check to next interrupt
; Check P00IRQ
; Jump to INT0 interrupt service routine
; Check TC0 interrupt request
; Check TC0IEN
; Jump check to next interrupt
; Check TC0IRQ
; Jump to TC0 interrupt service routine
; Check TC1 interrupt request
; Check TC1IEN
; Jump check to next interrupt
; Check TC1IRQ
B0BTS1
JMP
B0BTS0
JMP
FP00IEN
INTTC0CHK
FP00IRQ
INTP00
B0BTS1
JMP
B0BTS0
JMP
FTC0IEN
INTTC1CHK
FTC0IRQ
INTTC0
B0BTS1
JMP
B0BTS0
JMP
FTC1IEN
INT_EXIT
FTC1IRQ
INTTC1
; Jump to TC1 interrupt service routine
B0MOV
B0MOV
B0XCH
A, PFLAGBUF
PFLAG, A
A, ACCBUF
; Restore ACC value.
; Exit interrupt vector
RETI
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