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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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7733 Scheda tecnica(PDF) 704 Page - Renesas Technology Corp |
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7733 Scheda tecnica(HTML) 704 Page - Renesas Technology Corp |
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704 / 940 page  CONNECTING EXTERNAL DEVICES 7735 Group User’s Manual 12–28 External data bus Data length External data bus width Software wait 8 16 8, 16 16 (When accessed starting from even address) Wait 0 In use q State when “L” level is input to pin HOLD ALE HLDA HOLD Address A Address B 1 ! 1 1 ! 1 Hold state Data Sampling timing <<When “L” level is input to pin HOLD while bus is in use (3)>> External address bus/ External data bus External address bus Clock 1 Address A Floating Floating Floating BHE g CS0 to CS4 Bus is in use. Bus is in use. Bus is not in use. When “L” level which is input to pin HOLD is accepted, the address which was output immediately before is output again, instead of a new address. g RDE, WEL, WEH Fig. 12.4.5 Timing when hold state is accepted and terminated (4) 12.4 Hold function |
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