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PIC16LC62BT-20/SS 数据表(PDF) 90 Page - Microchip Technology |
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PIC16LC62BT-20/SS 数据表(HTML) 90 Page - Microchip Technology |
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90 / 120 page  PIC16C62B/72A DS35008B-page 90 Preliminary © 1998 Microchip Technology Inc. 13.4.3 TIMING DIAGRAMS AND SPECIFICATIONS FIGURE 13-5: EXTERNAL CLOCK TIMING TABLE 13-2: EXTERNAL CLOCK TIMING REQUIREMENTS Param No. Sym Characteristic Min Typ† Max Units Conditions 1A Fosc External CLKIN Frequency (Note 1) DC — 4 MHz RC and XT osc modes DC — 4 MHz HS osc mode (-04) DC — 20 MHz HS osc mode (-20) DC — 200 kHz LP osc mode Oscillator Frequency (Note 1) DC — 4 MHz RC osc mode 0.1 — 4 MHz XT osc mode 4 — 20 MHz HS osc mode 5 — 200 kHz LP osc mode 1 Tosc External CLKIN Period (Note 1) 250 — — ns RC and XT osc modes 250 — — ns HS osc mode (-04) 50 — — ns HS osc mode (-20) 5— — µsLP osc mode Oscillator Period (Note 1) 250 — — ns RC osc mode 250 — 10,000 ns XT osc mode 250 — 250 ns HS osc mode (-04) 50 — 250 ns HS osc mode (-20) 5— — µsLP osc mode 2 TCY Instruction Cycle Time (Note 1) 200 — DC ns TCY = 4/FOSC 3* TosL, TosH External Clock in (OSC1) High or Low Time 100 — — ns XT oscillator 2.5 — — µs LP oscillator 15 — — ns HS oscillator 4* TosR, TosF External Clock in (OSC1) Rise or Fall Time — — 25 ns XT oscillator — — 50 ns LP oscillator — — 15 ns HS oscillator * 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: 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/CLKIN pin. When an external clock input is used, the "Max." cycle time limit is "DC" (no clock) for all devices. 3 3 4 4 1 2 Q4 Q1 Q2 Q3 Q4 Q1 OSC1 CLKOUT |
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