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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PIC16F-E/ML 데이터시트(PDF) 147 Page - Microchip Technology |
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PIC16F-E/ML 데이터시트(HTML) 147 Page - Microchip Technology |
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147 / 178 page  © 2007 Microchip Technology Inc. DS40044F-page 145 PIC16F627A/628A/648A FIGURE 17-7: BROWN-OUT RESET TIMING 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 TMCLMCLR Pulse Width (low) 2000 — — ns VDD = 5V, -40°C to +85°C 31 TWDT Watchdog Timer Time out Period (No Prescaler) 7* 18 33* ms VDD = 5V, -40°C to +85°C 32 TOST Oscillation Start-up Timer Period — 1024 TOSC —— TOSC = OSC1 period 33 TPWRT Power-up Timer Period 28* 72 132* ms VDD = 5V, -40°C to +85°C 34 TIOZ I/O High-impedance from MCLR Low or Watchdog Timer Reset — — 2.0* μs 35 TBOR Brown-out Reset pulse width 100* — — μsVDD ≤ VBOR (D005) Legend: TBD = To Be Determined. * 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. VDD VBOR 35 46 47 45 48 41 42 40 RA4/T0CKI/CMP2 RB6/T1OSO/T1CKI/PGC TMR0 OR TMR1 |
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