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PIC16LC554 数据表(PDF) 30 Page - Microchip Technology |
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PIC16LC554 数据表(HTML) 30 Page - Microchip Technology |
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30 / 96 page  PIC16C55X(A) DS40143B-page 30 Preliminary © 1997 Microchip Technology Inc. FIGURE 6-3: TIMER0 TIMING: INTERNAL CLOCK/PRESCALE 1:2 FIGURE 6-4: 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,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF 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) TMR0 timer T0IF bit (INTCON<2>) FEh GIE bit (INTCON<7>) INSTRUCTION FLOW 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 Note 1: T0IF interrupt flag is sampled here (every Q1). 2: Interrupt latency = 4Tcy, where Tcy = instruction cycle time. 3: CLKOUT is available only in RC oscillator mode. Interrupt Latency Time |
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