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PIC16F753 数据表(PDF) 191 Page - Microchip Technology |
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PIC16F753 数据表(HTML) 191 Page - Microchip Technology |
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191 / 230 page  2013-2015 Microchip Technology Inc. DS40001709C-page 191 PIC16F753/HV753 FIGURE 22-8: TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS TABLE 22-12: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS Standard Operating Conditions (unless otherwise stated) Param No. Sym. Characteristic Min. Typ† Max. Units Conditions 40* TT0H T0CKI High Pulse Width No Prescaler 0.5 TCY + 20 — — ns With Prescaler 10 — — ns 41* TT0L T0CKI Low Pulse Width No Prescaler 0.5 TCY + 20 — — ns With Prescaler 10 — — ns 42* TT0P T0CKI Period Greater of: 20 or TCY + 40 N — — ns N = prescale value 45* TT1H T1CKI High Time Synchronous, No Prescaler 0.5 TCY + 20 — — ns Synchronous, with Prescaler 15 — — ns Asynchronous 30 — — ns 46* TT1L T1CKI Low Time Synchronous, No Prescaler 0.5 TCY + 20 — — ns Synchronous, with Prescaler 15 — — ns Asynchronous 30 — — ns 47* TT1P T1CKI Input Period Synchronous Greater of: 30 or TCY + 40 N — — ns N = prescale value Asynchronous 60 — — ns 49* TCKEZTMR1 Delay from External Clock Edge to Timer Increment 2 TOSC —7 TOSC — Timers in Sync mode * These parameters are characterized but not tested. † Data in “Typ” column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance only and are not tested. T0CKI T1CKI 40 41 42 45 46 47 49 TMR0 or TMR1 |
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