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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PIC16F818-E/ML 데이터시트(PDF) 133 Page - Microchip Technology |
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PIC16F818-E/ML 데이터시트(HTML) 133 Page - Microchip Technology |
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133 / 176 page  2004 Microchip Technology Inc. DS39598E-page 131 PIC16F818/819 FIGURE 15-4: EXTERNAL CLOCK TIMING OSC1 CLKO Q4 Q1 Q2 Q3 Q4 Q1 1 2 3 3 4 4 TABLE 15-1: EXTERNAL CLOCK TIMING REQUIREMENTS Param No. Sym Characteristic Min Typ† Max Units Conditions FOSC External CLKI Frequency (Note 1) DC — 1 MHz XT and RC Oscillator mode DC — 20 MHz HS Oscillator mode DC — 32 kHz LP Oscillator mode Oscillator Frequency (Note 1) DC — 4 MHz RC Oscillator mode 0.1 — 4 MHz XT Oscillator mode 4 5 — — 20 200 MHz kHz HS Oscillator mode LP Oscillator mode 1TOSC External CLKI Period (Note 1) 1000 — — ns XT and RC Oscillator mode 50 — — ns HS Oscillator mode 5 — — ms LP Oscillator mode Oscillator Period (Note 1) 250 — — ns RC Oscillator mode 250 — 10,000 ns XT Oscillator mode 50 — 250 ns HS Oscillator mode 5 — — ms LP Oscillator mode 2TCY Instruction Cycle Time (Note 1) 200 TCY DC ns TCY = 4/FOSC 3TOSL, TOSH External Clock in (OSC1) High or Low Time 500 — — ns XT Oscillator 2.5 — — ms LP Oscillator 15 — — ns HS Oscillator 4TOSR, TOSF External Clock in (OSC1) Rise or Fall Time — — 25 ns XT Oscillator — — 50 ns LP Oscillator — — 15 ns HS Oscillator † 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: Instruction cycle period (TCY) equals four times the input oscillator time base period. All specified values are based on characterization data for that particular oscillator type, under standard operating conditions, with the device executing code. Exceeding these specified limits may result in an unstable oscillator operation and/or higher than expected current consumption. All devices are tested to operate at “min.” values with an external clock applied to the OSC1/CLKI pin. When an external clock input is used, the “max.” cycle time limit is “DC” (no clock) for all devices. |
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