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PIC16F84A 数据表(PDF) 52 Page - Microchip Technology |
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PIC16F84A 数据表(HTML) 52 Page - Microchip Technology |
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52 / 68 page ![]() PIC16F84A DS35007A-page 52 Preliminary © 1998 Microchip Technology Inc. FIGURE 9-6: TIMER0 CLOCK TIMINGS TABLE 9-6 TIMER0 CLOCK REQUIREMENTS Parameter No. Sym Characteristic Min Typ† Max Units Conditions 40 Tt0H T0CKI High Pulse Width No Prescaler 0.5TCY + 20 * — — ns With Prescaler 50 * 30 * — — — — ns ns 2.0V ≤ VDD ≤ 3.0V 3.0V ≤ VDD ≤ 6.0V 41 Tt0L T0CKI Low Pulse Width No Prescaler 0.5TCY + 20 * — — ns With Prescaler 50 * 20 * — — — — ns ns 2.0V ≤ VDD ≤ 3.0V 3.0V ≤ VDD ≤ 6.0V 42 Tt0P T0CKI Period TCY + 40 * N — — ns N = prescale value (2, 4, ..., 256) * These parameters are characterized but not tested. † Data in "Typ" column is at 5.0V, 25 °C unless otherwise stated. These parameters are for design guidance only and are not tested. RA4/T0CKI 40 41 42 |
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