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PIC12LC671 数据表(PDF) 104 Page - Microchip Technology |
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PIC12LC671 数据表(HTML) 104 Page - Microchip Technology |
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104 / 129 page  PIC12C67X DS30561B-page 104 © 1999 Microchip Technology Inc. FIGURE 12-8: TIMER0 CLOCK TIMINGS TABLE 12-5: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS TABLE 12-6: GPIO PULL-UP RESISTOR RANGES 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) 48 TCKE2tmr1 Delay from external clock edge to timer increment 2TOSC —7Tos c — * 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. VDD (Volts) Temperature ( °C) Min Typ Max Units GP0/GP1 2.5 –40 38K 42K 63K Ω 25 42K 48K 63K Ω 85 42K 49K 63K Ω 125 50K 55K 63K Ω 5.5 –40 15K 17K 20K Ω 25 18K 20K 23K Ω 85 19K 22K 25K Ω 125 22K 24K 28K Ω GP3 2.5 –40 285K 346K 417K Ω 25 343K 414K 532K Ω 85 368K 457K 532K Ω 125 431K 504K 593K Ω 5.5 –40 247K 292K 360K Ω 25 288K 341K 437K Ω 85 306K 371K 448K Ω 125 351K 407K 500K Ω * These parameters are characterized but not tested. Note: Refer to Figure 12-4 for load conditions. 41 42 40 GP2/T0CKI TMR0 |
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