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PIC16F876ATI/ML Datasheet(PDF) 185 Page - Microchip Technology |
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PIC16F876ATI/ML Datasheet(HTML) 185 Page - Microchip Technology |
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185 / 234 page  2003 Microchip Technology Inc. DS39582B-page 183 PIC16F87XA FIGURE 17-5: CLKO AND I/O TIMING TABLE 17-4: CLKO AND I/O TIMING REQUIREMENTS Note: Refer to Figure 17-3 for load conditions. OSC1 CLKO I/O pin (Input) I/O pin (Output) Q4 Q1 Q2 Q3 10 13 14 17 20, 21 19 18 15 11 12 16 Old Value New Value Param No. Symbol Characteristic Min Typ† Max Units Conditions 10* TOSH2CKLOSC1 ↑ to CLKO ↓ — 75 200 ns (Note 1) 11* TOSH2CKHOSC1 ↑ to CLKO ↑ — 75 200 ns (Note 1) 12* TCKR CLKO Rise Time — 35 100 ns (Note 1) 13* TCKF CLKO Fall Time — 35 100 ns (Note 1) 14* TCKL2IOVCLKO ↓ to Port Out Valid — — 0.5 TCY + 20 ns (Note 1) 15* TIOV2CKH Port In Valid before CLKO ↑ TOSC + 200 — — ns (Note 1) 16* TCKH2IOI Port In Hold after CLKO ↑ 0— — ns (Note 1) 17* TOSH2IOVOSC1 ↑ (Q1 cycle) to Port Out Valid — 100 255 ns 18* TOSH2IOIOSC1 ↑ (Q2 cycle) to Port Input Invalid (I/O in hold time) Standard (F) 100 — — ns Extended (LF) 200 — — ns 19* TIOV2OSH Port Input Valid to OSC1 ↑ (I/O in setup time) 0 — — ns 20* TIOR Port Output Rise Time Standard (F) — 10 40 ns Extended (LF) — — 145 ns 21* TIOF Port Output Fall Time Standard (F) — 10 40 ns Extended (LF) — — 145 ns 22††* TINP INT pin High or Low Time TCY —— ns 23††* TRBP RB7:RB4 Change INT High or Low Time TCY —— ns * 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. †† These parameters are asynchronous events not related to any internal clock edges. Note 1: Measurements are taken in RC mode where CLKO output is 4 x TOSC. |
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