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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PIC16F627A датащи(PDF) 150 Page - Microchip Technology |
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PIC16F627A датащи(HTML) 150 Page - Microchip Technology |
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150 / 180 page  PIC16F627A/628A/648A DS40044D-page 148 © 2005 Microchip Technology Inc. TABLE 17-8: 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 With Prescaler 10* — — ns 41 TT0L T0CKI Low Pulse Width No Prescaler 0.5TCY + 20* — — ns With Prescaler 10* — — ns 42 TT0P T0CKI Period 20 or Greater of: TCY + 40* N — — ns N = prescale value (2, 4, ..., 256) 45 TT1H T1CKI High Time Synchronous, No Prescaler 0.5TCY + 20* — — ns Synchronous, with Prescaler PIC16F62XA 15* — — ns PIC16LF62XA 25* — — ns Asynchronous PIC16F62XA 30* — — ns PIC16LF62XA 50* — — ns 46 TT1L T1CKI Low Time Synchronous, No Prescaler 0.5TCY + 20* — — ns Synchronous, with Prescaler PIC16F62XA 15* — — ns PIC16LF62XA 25* — — ns Asynchronous PIC16F62XA 30* — — ns PIC16LF62XA 50* — — ns 47 TT1P T1CKI input period Synchronous PIC16F62XA 20 or Greater of: TCY + 40* N — — ns N = prescale value (1, 2, 4, 8) PIC16LF62XA 20 or Greater of: TCY + 40* N —— — Asynchronous PIC16F62XA 60* — — ns PIC16LF62XA 100* — — ns FT1 Timer1 oscillator input frequency range (oscillator enabled by setting bit T1OSCEN) —32.7(1) —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 1: This oscillator is intended to work only with 32.768 kHz watch crystals and their manufactured tolerances. Higher value crystal frequencies may not be compatible with this crystal driver. |
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