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PIC16F84A Datasheet(PDF) 192 Page - Microchip Technology |
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PIC16F84A Datasheet(HTML) 192 Page - Microchip Technology |
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192 / 337 page  PIC16C6X DS30234D-page 192 © 1997 Microchip Technology Inc. Applicable Devices 61 62 62A R62 63 R63 64 64A R64 65 65A R65 66 67 FIGURE 18-5: TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS TABLE 18-5: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS Param No. Sym Characteristic Min Typ† Max Units Conditions 40* Tt0H T0CKI High Pulse Width No Prescaler 0.5TCY + 20 — — ns Must also meet parameter 42 With Prescaler 10 — — ns 41* Tt0L T0CKI Low Pulse Width No Prescaler 0.5TCY + 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 0.5TCY + 20 — — ns Must also meet parameter 47 Synchronous, Prescaler = 2,4,8 PIC16C6X 15 — — ns PIC16LC6X 25 — — ns Asynchronous PIC16C6X 30 — — ns PIC16LC6X 50 — — ns 46* Tt1L T1CKI Low Time Synchronous, Prescaler = 1 0.5TCY + 20 — — ns Must also meet parameter 47 Synchronous, Prescaler = 2,4,8 PIC16C6X 15 — — ns PIC16LC6X 25 — — ns Asynchronous PIC16C6X 30 — — ns PIC16LC6X 50 — — ns 47* Tt1P T1CKI input period Synchronous PIC16C6X Greater of: 30 OR TCY + 40 N — — ns N = prescale value (1, 2, 4, 8) PIC16LC6X Greater of: 50 OR TCY + 40 N N = prescale value (1, 2, 4, 8) Asynchronous PIC16C6X 60 — — ns PIC16LC6X 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 2Tosc — 7Tosc — * 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 18-1 for load conditions. RA4/T0CKI RC0/T1OSI/T1CKI TMR0 or TMR1 46 47 45 48 41 42 40 |
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