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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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DP83936AVF датащи(PDF) 83 Page - National Semiconductor (TI) |
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DP83936AVF датащи(HTML) 83 Page - National Semiconductor (TI) |
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83 / 104 page  90 AC and DC Specifications (Continued) MEMORY WRITE BMODE e 1 SYNCHRONOUS MODE (one wait-state shown) TLF12597 – 64 Number Parameter 20 MHz 25 MHz 33 MHz Units Min Max Min Max Min Max T9 BSCK to Address ValidHold Time 3 26 3 24 3 22 ns T11a BSCK to AS Low 17 15 13 ns T11c BSCK to ECS Low 19 17 15 ns T12a BSCK to AS High 17 15 13 ns T12c BSCK to ECS High 19 17 15 ns T13a BSCK to DS High (Note 1) 16 14 12 ns T13b BSCK to DS High (Note 1) 16 14 12 ns T14 AS Low Width 44 34 24 ns T15a AS High Width 45 35 25 ns T18 Write Data Strobe Width (Note 1) 40 30 20 ns T19 Address Hold Time from AS 18 14 10 ns T20 Data Hold Time from AS 20 16 12 ns T22 Address Valid to AS (Note 3) 9 6 2 ns T30 DSACK01 Setup to BSCK (Note 3) 5 4 3 ns T31 DSACK01 Hold from BSCK 9 8 7 ns T36 BSCK to Memory Write Data ValidHold 350348346 ns Time (Note 4) T37a BSCK to MRW (Write) Valid (Note 2) 26 24 22 ns T39 Write Data Valid to Data Strobe Low 34 21 7 ns Note 1 DS will only be asserted if the bus cycle has at least one wait state inserted Note 2 For successive write operations MRW remains low Note 3 DSACK01 must be synchronized to the bus clock (BSCK) during synchronous mode Note 4 One idle clock cycle (Ti) will be inserted between the last write cycle and the following read cycle in RDA and TDA operation Note that the data bus will become TRI-STATE from the rising edge of the clock after the idle cycle (see T52 for BSCK to data TRI-STATE timing) http www nationalcom 83 |
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