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PSD4235G2 データシート(PDF) 76 Page - STMicroelectronics |
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PSD4235G2 データシート(HTML) 76 Page - STMicroelectronics |
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76 / 89 page  PSD4235G2 76/89 Table 65. Read Timing Note: 1. RD timing has the same timing as DS, LDS, UDS, and PSEN signals. 2. RD and PSEN have the same timing. 3. Any input used to select an internal PSD function. 4. In multiplexed mode, latched addresses generated from ADIO delay to address output on any Port. 5. RD timing has the same timing as DS, LDS, and UDS signals. Symbol Parameter Conditions -70 -90 Turbo Off Unit Min Max Min Max tLVLX ALE or AS Pulse Width 15 20 ns tAVLX Address Setup Time (Note 3) 46 ns tLXAX Address Hold Time (Note 3) 78 ns tAVQV Address Valid to Data Valid (Note 3) 70 90 + 12 ns tSLQV CS Valid to Data Valid 75 100 ns tRLQV RD to Data Valid 8-Bit Bus (Note 5) 24 32 ns RD or PSEN to Data Valid 8-Bit Bus, 8031, 80251 (Note 2) 31 38 ns tRHQX RD Data Hold Time (Note 1) 00 ns tRLRH RD Pulse Width (Note 1) 27 32 ns tRHQZ RD to Data High-Z (Note 1) 20 25 ns tEHEL E Pulse Width 27 32 ns tTHEH R/W Setup Time to Enable 6 10 ns tELTL R/W Hold Time After Enable 0 0 ns tAVPV Address Input Valid to Address Output Delay (Note 4) 20 25 ns |
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