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D17133CS Datasheet(PDF) 174 Page - NEC

Part # D17133CS
Description  4-BIT SINGLE-CHIP MICROCONTROLLER
PDF  289 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

D17133CS Datasheet(HTML) 174 Page - NEC

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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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