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PIC16F7X7 Datasheet(PDF) 228 Page - Microchip Technology |
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PIC16F7X7 Datasheet(HTML) 228 Page - Microchip Technology |
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228 / 276 page  PIC16F7X7 DS30498C-page 226 2004 Microchip Technology Inc. FIGURE 18-9: TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS TABLE 18-7: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS Param No. Symbol Characteristic Min Typ† Max Units Conditions 40* TT0H T0CKI High Pulse Width No prescaler 0.5 TCY + 20 — — ns Must also meet parameter 42 With prescaler 10 — — ns 41* TT0L T0CKI Low Pulse Width No prescaler 0.5 TCY + 20 — — ns Must also meet parameter 42 With prescaler 10 — — ns 42* TT0P T0CKI Period No prescaler TCY + 40 — — ns With prescaler Greater of: 20 or TCY + 40 N — — ns N = prescale value (2, 4, ..., 256) 45* TT1H T1CKI High Time Synchronous, Prescaler = 1 0.5 TCY + 20 — — ns Must also meet parameter 47 Synchronous, Prescaler = 2, 4, 8 PIC16F7X7 15 — — ns PIC16LF7X7 25 — — ns Asynchronous PIC16F7X7 30 — — ns PIC16LF7X7 50 — — ns 46* TT1L T1CKI Low Time Synchronous, Prescaler = 1 0.5 TCY + 20 — — ns Must also meet parameter 47 Synchronous, Prescaler = 2, 4, 8 PIC16F7X7 15 — — ns PIC16LF7X7 25 — — ns Asynchronous PIC16F7X7 30 — — ns PIC16LF7X7 50 — — ns 47* TT1P T1CKI Input Period Synchronous PIC16F7X7 Greater of: 30 or TCY + 40 N — — ns N = prescale value (1, 2, 4, 8) PIC16LF7X7 Greater of: 50 or TCY + 40 N — — ns N = prescale value (1, 2, 4, 8) Asynchronous PIC16F7X7 60 — — ns PIC16LF7X7 100 — — ns FT1 Timer1 Oscillator Input Frequency Range (oscillator enabled by setting bit T1OSCEN) DC — 200 kHz 48 TCKEZTMR1 Delay from External Clock Edge to Timer Increment 2 TOSC —7 TOSC — * 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. Note: Refer to Figure 18-4 for load conditions. 46 47 45 48 41 42 40 RA4/T0CKI/C1OUT RC0/T1OSO/T1CKI TMR0 or TMR1 |
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