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7721 Datasheet(PDF) 431 Page - Renesas Technology Corp |
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7721 Datasheet(HTML) 431 Page - Renesas Technology Corp |
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431 / 577 page  APPLICATION 7721 Group User’s Manual 16–28 16.1 Memory connection (5) Example of DRAM connection (external bus width = 8 bits) Fig. 16.1.24 Example of M5M44400CJ (1M ! 4 bits) connection (external bus width = 8 bits) 00000016 00008016 00047F16 001FC016 001FFF16 F0000016 FFFFFF16 M5M44400CJ-7 MA0 MA1 MA2 MA3 MA4 MA5 MA6 MA7 MA8 MA9 RAS CAS R/W E A16/D0 A17/D1 A18/D2 A19/D3 A20/D4 A21/D5 A22/D6 A23/D7 M37721 DQ1 DQ2 DQ3 DQ4 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 RAS CAS W OE XIN XOUT 25 MHz AC32 MA0 MA1 MA2 MA3 MA4 MA5 MA6 MA7 MA8 MA9 10 RAS CAS OE 4 W RAS CAS W E DQ1 DQ2 DQ3 DQ4 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 BYTE M5M44400CJ-7 V SFR area Internal RAM area DRAM area (M5M44400CJ ! 2) Memory map Circuit condition : DRAM area select bits (bits 3 to 0 at address 6416) = “00012” V : Make sure that the propagation delay time is within 80 ns. SFR area Not used Not used |
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