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PIC16C72-04/SP Datasheet(PDF) 84 Page - Microchip Technology |
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PIC16C72-04/SP Datasheet(HTML) 84 Page - Microchip Technology |
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84 / 124 page  PIC16C72 Series DS39016A-page 84 Preliminary © 1998 Microchip Technology Inc. 13.5 Timing Diagrams and Specifications FIGURE 13-2: EXTERNAL CLOCK TIMING OSC1 CLKOUT Q4 Q1 Q2 Q3 Q4 Q1 1 2 3 3 4 4 TABLE 13-3 EXTERNAL CLOCK TIMING REQUIREMENTS Parameter No. Sym Characteristic Min Typ† Max Units Conditions Fosc External CLKIN Frequency (Note 1) DC — 4 MHz XT and RC osc mode DC — 4 MHz HS osc mode (-04) DC — 10 MHz HS osc mode (-10) 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 5 — — 20 200 MHz kHz HS osc mode LP osc mode 1 Tosc External CLKIN Period (Note 1) 250 — — ns XT and RC osc mode 250 — — ns HS osc mode (-04) 100 — — ns HS osc mode (-10) 50 — — ns HS osc mode (-20) 5 — — µs LP 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) 100 50 — — 250 250 ns ns HS osc mode (-10) HS osc mode (-20) 5 — — µs LP 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 † 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. |
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