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PIC12LC671-10/JM 数据表(PDF) 40 Page - Microchip Technology |
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PIC12LC671-10/JM 数据表(HTML) 40 Page - Microchip Technology |
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40 / 129 page  PIC12C67X DS30561B-page 40 © 1999 Microchip Technology Inc. FIGURE 7-3: TIMER0 TIMING: INTERNAL CLOCK/PRESCALE 1:2 FIGURE 7-4: TIMER0 INTERRUPT TIMING PC-1 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 PC (Program Counter) Instruction Fetch TMR0 PC PC+1 PC+2 PC+3 PC+4 PC+5 PC+6 T0 NT0+1 MOVWF TMR0 MOVF TMR0,WMOVF TMR0,WMOVF TMR0,WMOVF TMR0,WMOVF TMR0,W Write TMR0 executed Read TMR0 reads NT0 Read TMR0 reads NT0 Read TMR0 reads NT0 Read TMR0 reads NT0 Read TMR0 reads NT0 + 1 T0+1 NT0 Instruction Execute Q2 Q1 Q3 Q4 Q2 Q1 Q3 Q4 Q2 Q1 Q3 Q4 Q2 Q1 Q3 Q4 Q2 Q1 Q3 Q4 1 1 OSC1 CLKOUT(3) Timer0 T0IF bit (INTCON<2>) FEh GIE bit (INTCON<7>) INSTRUCTION PC Instruction fetched PC PC +1 PC +1 0004h 0005h Instruction executed Inst (PC) Inst (PC-1) Inst (PC+1) Inst (PC) Inst (0004h) Inst (0005h) Inst (0004h) Dummy cycle Dummy cycle FFh 00h 01h 02h FLOW Interrupt Latency(2) Note 1: Interrupt flag bit T0IF is sampled here (every Q1). 2: Interrupt latency = 3TCY where TCY = instruction cycle time. 3: CLKOUT is available only in the INTRC and EXTRC oscillator modes. |
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