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7721 Datasheet(PDF) 419 Page - Renesas Technology Corp |
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7721 Datasheet(HTML) 419 Page - Renesas Technology Corp |
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419 / 577 page  APPLICATION 7721 Group User’s Manual 16–16 16.1 Memory connection M37721 CNVss A0–A7 BYTE ALE A8/D8–A15/D15 E R/W BHE BLE XIN XOUT A16/D0–A23/D7 RD WO WE DQ LE OE DQ LE OE AB DIR OC AB DIR OC AC245 AC245 AC573 AC573 AC32 AC04 AC32 25 MHz Data bus (odd) Address bus Data bus (even) V2 V2 V3 V1 V4 Circuit condition: Software Wait V1: Make sure that the propagation delay time is within 20 ns. V2, V3: Make sure that the sum of output disable time in V2 and propagation delay time in V3 is within 20 ns. V4: Make sure that the propagation delay time is within 15 ns. Fig. 16.1.12 Example of using bus buffers (1) |
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