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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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UPD17708 Datasheet(PDF) 190 Page - NEC |
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UPD17708 Datasheet(HTML) 190 Page - NEC |
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190 / 356 page  µPD17704, 17705, 17707, 17708, 17709 190 13.6.5 Example of using timer 3 An example of a program using timer 3 (multiplexed with PWM) is given below. This program executes processing B every 888 µs. TM3DATA DAT 0064H ; Count data = 100 START: BR INITIAL ; Reset address ; Interrupt vector address NOP ; SIO1 NOP ; SIO0 BR INT_TM3 ; TM3 NOP ; TM2 NOP ; TM1 NOP ; TM0 NOP ; INT4 NOP ; INT3 NOP ; INT2 NOP ; INT1 NOP ; INT0 NOP ; Down edge of CE INITIAL: INITFLG NOT PWMSEL2 , NOT PWMSEL1 , NOT PWMSEL0 ; (General-purpose port), (General-purpose port), (General-purpose port) INITFLG NOT PWMBIT, PWMCK ; ( 8BIT ), (440 Hz) INITFLG TM3SEL , NOT TM3EN, TM3RES ; (Timer 3 mode), (Stop) , (Reset) MOV DBF0, #TM3DATA MOV DBF1, #TM3DATA SHR4 AND 0FH PUT TM3M, DBF SET1 TM3EN ; START SET1 IPTM3 ; Enables timer 3 interrupt EI LOOP: Processing A BR LOOP INT_TM3: PUT DBFSTK, DBF ; Saves data buffer Processing B GET DBF, DBFSTK EI RETI ; Return END |
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