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PIC16LC554 数据表(PDF) 75 Page - Microchip Technology |
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PIC16LC554 数据表(HTML) 75 Page - Microchip Technology |
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75 / 96 page  © 1997 Microchip Technology Inc. Preliminary DS40143B-page 75 PIC16C55X(A) FIGURE 10-3: CLKOUT AND I/O TIMING TABLE 10-3: CLKOUT AND I/O TIMING REQUIREMENTS Parameter # Sym Characteristic Min Typ† Max Units 10* TosH2ckL OSC1 ↑ to CLKOUT↓ (Note1) — — 75 — 200 400 ns ns 11* TosH2ckH OSC1 ↑ to CLKOUT↑ (Note1) — — 75 — 200 400 ns ns 12* TckR CLKOUT rise time (Note1) — — 35 — 100 200 ns ns 13* TckF CLKOUT fall time (Note1) — — 35 — 100 200 ns ns 14* TckL2ioV CLKOUT ↓ to Port out valid (Note1) — — 20 ns 15* TioV2ckH Port in valid before CLKOUT ↑ (Note1) Tosc +200 ns Tosc +400 ns — — — — ns ns 16* TckH2ioI Port in hold after CLKOUT ↑ (Note1) 0 — — ns 17* TosH2ioV OSC1 ↑ (Q1 cycle) to Port out valid — — 50 150 300 ns ns 18* TosH2ioI OSC1 ↑ (Q2 cycle) to Port input invalid (I/O in hold time) 100 200 — — — — ns ns 19* TioV2osH Port input valid to OSC1 ↑ (I/O in setup time) 0 — — ns 20* TioR Port output rise time — — 10 — 40 80 ns ns 21* TioF Port output fall time — — 10 — 40 80 ns ns 22* Tinp RB0/INT pin high or low time 25 40 — — — — ns ns 23 Trbp RB<7:4> change interrupt high or low time Tcy — — ns * These parameters are characterized but not tested † Data in "Typ" column is at 5.0V, 25 °C unless otherwise stated. These parameters are for design guidance only and are not tested. Note 1: Measurements are taken in RC Mode where CLKOUT output is 4 x TOSC 22 23 Note: All tests must be do with specified capacitance loads (Figure 10-1) 50 pF on I/O pins and CLKOUT OSC1 CLKOUT 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 |
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