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D17133CS Datasheet(PDF) 143 Page - NEC |
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D17133CS Datasheet(HTML) 143 Page - NEC |
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143 / 289 page  CHAPTER 13 PERIPHERAL HARDWARE 128 INITFLG NOT IEGMD1, IEGMD0 ; Sets input from INT pin to falling edge CLR1 IRQ ; Clears interrupt request signal from INT pin INITFLG TMEM, TMRES, NOT TMCK1, TMCK0 ; Sets source clock of timer to "fX/32" ; Clears timer count register and IRQTM, ; and starts timer EI LOOP: BR LOOP BR TMRESTART INTJOB: ; Vector interrupt becomes interrupt prohibit GET DBF, TMC ; state automatically immediately after accepting ; interrupt MOV RPH, #.DM. (CNTTMH SHR 7) AND 0EH ; Sets general register pointer by using ; symbol-defined "CNTTMH" and "CNTTML" AND RPL, #0001B ; OR RPL, # .DM. (CNTTMH SHR 3) AND 0EH ; At this time, BCD flag retains the previous state LD CNTTMH, DBF1 ; Stores count value to count save area LD CNTTML, DBF0 ; EI ; Makes interrupt permit state when executing ; main processing program RETI ; Returns to main processing program |
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