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PIC16F628A-E/ML 데이터시트(PDF) 145 Page - Microchip Technology |
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PIC16F628A-E/ML 데이터시트(HTML) 145 Page - Microchip Technology |
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145 / 168 page ![]() 2002 Microchip Technology Inc. Preliminary DS40044A-page 143 PIC16F627A/628A/648A TABLE 17-7: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP TIMER REQUIREMENTS FIGURE 17-8: TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS Parameter No. Sym Characteristic Min Typ† Max Units Conditions 30 TmcL MCLR Pulse Width (low) 2000 TBD — TBD — TBD ns ms V DD = 5V, -40°C to +85°C Extended temperature 31 Twdt Watchdog Timer Time out Period (No Prescaler) 7* TBD 18 TBD 33* TBD ms ms V DD = 5V, -40°C to +85°C Extended temperature 32 Tost Oscillation Start-up Timer Period — 1024T OSC —— T OSC = OSC1 period 33 Tpwrt Power-up Timer Period 28* TBD 72 TBD 132* TBD ms ms V DD = 5V, -40°C to +85°C Extended temperature 34 TIOZ I/O Hi-impedance from MCLR Low or Watchdog Timer Reset — — 2.0* µs 35 T BOR Brown-out Reset pulse width 100* — — µsVDD ≤ VBOR (D005) * 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. 46 47 45 48 41 42 40 RA4/T0CKI RB6/T1OSO/T1CKI TMR0 OR TMR1 |
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