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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PIC16LC71 датащи(PDF) 98 Page - Microchip Technology |
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PIC16LC71 датащи(HTML) 98 Page - Microchip Technology |
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98 / 176 page  PIC16C71X DS30272A-page 98 © 1997 Microchip Technology Inc. Applicable Devices 710 71 711 715 FIGURE 11-6: TIMER0 EXTERNAL CLOCK TIMINGS TABLE 11-5: TIMER0 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 Greater of: 20 ns or TCY + 40* N — — ns N = prescale value (2, 4,..., 256) 48 Tcke2tmrI 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 11-1 for load conditions. 41 42 40 RA4/T0CKI TMR0 |
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