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PIC18F4520E/MLQTP Datasheet(PDF) 346 Page - Microchip Technology |
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PIC18F4520E/MLQTP Datasheet(HTML) 346 Page - Microchip Technology |
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346 / 390 page  PIC18F2420/2520/4420/4520 DS39631A-page 344 Preliminary 2004 Microchip Technology Inc. FIGURE 26-6: CLKO AND I/O TIMING TABLE 26-9: CLKO AND I/O TIMING REQUIREMENTS Note: Refer to Figure 26-4 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 TosH2ckL OSC1 ↑ to CLKO ↓ — 75 200 ns (Note 1) 11 TosH2ckH OSC1 ↑ 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 TckL2ioV CLKO ↓ to Port Out Valid — — 0.5 TCY + 20 ns (Note 1) 15 TioV2ckH Port In Valid before CLKO ↑ 0.25 TCY + 25 — — ns (Note 1) 16 TckH2ioI Port In Hold after CLKO ↑ 0— — ns (Note 1) 17 TosH2ioV OSC1 ↑ (Q1 cycle) to Port Out Valid — 50 150 ns 18 TosH2ioI OSC1 ↑ (Q2 cycle) to Port Input Invalid (I/O in hold time) PIC18FXXXX 100 — — ns 18A PIC18LFXXXX 200 — — ns VDD = 2.0V 19 TioV2osH Port Input Valid to OSC1 ↑ (I/O in setup time) 0 — — ns 20 TioR Port Output Rise Time PIC18FXXXX — 10 25 ns 20A PIC18LFXXXX — — 60 ns VDD = 2.0V 21 TioF Port Output Fall Time PIC18FXXXX — 10 25 ns 21A PIC18LFXXXX — — 60 ns VDD = 2.0V 22† TINP INT pin High or Low Time TCY —— ns 23† TRBP RB7:RB4 Change INT High or Low Time TCY —— ns 24† TRCP RC7:RC4 Change INT High or Low Time 20 ns † 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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