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HCS320 数据表(PDF) 20 Page - Microchip Technology |
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HCS320 数据表(HTML) 20 Page - Microchip Technology |
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20 / 28 page  HCSXXX DS41256A-page 20 Preliminary 2004 Microchip Technology Inc. 5.3 Timing Requirements for Program/Verify Mode – Decoders AC/DC CHARACTERISTICS Standard Operating Conditions (unless otherwise stated) Operating Temperature +25°C ± 5°C Operating Voltage 4.5V ≤ VDD ≤ 5.5V Sym Characteristics Sugg. Value Min Max Units Conditions/Comments HCS500 FCLK Clock frequency — 500 25000 Hz TACK Decoder acknowledge time — 30 µs TADDR Address validate time — — 10 µs TCLKH Clock high time — 20 1000 µs TCLKL Clock low time — 20 1000 µs TCMD Command validate time — — 10 µs TDATA Command last bit to data first bit — — 10 µs TDS Data hold time — 14 — µs TREQ Command request time — 0.015 500 ms TRESP Acknowledge time — — 1 ms TSTART Command request to first command bit — 20 1000 µs HCS512 TACK Acknowledge time — — 80 ms FOSC = 4 MHZ TACKH Acknowledge duration — 1 — µsFOSC = 4 MHZ TCLKH Clock high time — 0.05 320 µsFOSC = 4 MHZ TCLKL Clock low time — 0.05 320 µsFOSC = 4 MHZ TPH1 Hold Time 1 — 8 128 ms FOSC = 4 MHZ TPH2 Hold Time 2 — 0.05 320 µsFOSC = 4 MHZ TPS Program mode setup time — 1 64 ms FOSC = 4 MHZ HCS515 TACK Command acknowledge time * 30 240 ms TCLKH Clock high time 100 20 1000 µs TCLKL Clock low time 100 20 1000 µs TDATA Command last bit to data first bit 100 10 1000 µs TDS Data hold time 50 14 1000 µs TREQ Command request time * 0.005 500 ms TRESP Acknowledge time 100 10 1000 µs TSTART Command request to first command bit 100 20 1000 µs TWTH Acknowledge respond time 100 20 1000 µs TWTL Clock low to next command 100 10 — µs * Depends on decoder status. |
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