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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PIC16F684 датащи(PDF) 146 Page - Microchip Technology |
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PIC16F684 датащи(HTML) 146 Page - Microchip Technology |
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146 / 192 page  PIC16F684 DS41202F-page 144 © 2007 Microchip Technology Inc. FIGURE 15-8: TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS TABLE 15-5: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS Standard Operating Conditions (unless otherwise stated) Operating Temperature -40°C ≤ TA ≤ +125°C 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 (2, 4, ..., 256) 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 (1, 2, 4, 8) Asynchronous 60 — — ns 48 FT1 Timer1 Oscillator Input Frequency Range (oscillator enabled by setting bit T1OSCEN) — 32.768 — kHz 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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