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D17133CS Datasheet(PDF) 174 Page - NEC |
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D17133CS Datasheet(HTML) 174 Page - NEC |
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174 / 289 page ![]() CHAPTER 14 INTERRUPT FUNCTIONS 159 INT_JOB: NOP ; Loop which executes waiting for 100 µs at 8 MHz NOP ; 2 µs (1 instruction) × 5 instructions × 10 times ; (count value at WAIT) ADD WAITCNT, #01 ; SKE WAITCNT, #0AH ; BR INT_JOB ; SKF1 INT ; Check the level of INT pin BR KEY_OFF ; If INT pin is high level, interrupt is invalid, and returns ; to main processing SKF1 SECOND ; First wait? BR WAIT_END ; If it is the first time, wait again after setting SECOND. ; In the case of the second time, finish wait processing SET1 SECOND ; MOV WAITCNT, #0 BR INT_JOB WAIT_END: SET1 KEYON ; Judges that there is key input BR INT_JOB_END KEY_OFF: CLR1 SECOND ; SECOND ←0 INT_JOB_END: MOV WAITCNT, #0 EI RETI |
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