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7733 Datasheet(PDF) 729 Page - Renesas Technology Corp |
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7733 Datasheet(HTML) 729 Page - Renesas Technology Corp |
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729 / 940 page  APPLICATIONS 7735 Group User’s Manual 17–3 17.1 Memory expansion Table 17.1.1 Memory expansion models BYTE M37735MHBXXXFP BYTE M37735MHBXXXFP 8 bits wide BYTE = “H” 16 bits wide BYTE = “L” A0 to A15+n D0 to D7 8 16 + n E (n ≤ 2) D Q Latch Latch Latch E A0 to A15+n D0 to D15 8 16 n 16 + n D Q E D Q P0 P1 P2 ALE ALE P0 P1 P2 8 8 n 8 (n ≤ 2) g For functions and operations of pins used in memory expansion, refer to chapter “12. CONNECTING EXTERNAL DEVICES.” For timing characteristics, refer to chapter “15. ELECTRICAL CHARACTERISTICS.” g In memory expansion, the address bus can be expanded up to 18 bits wide. Accordingly, be sure to strengthen the 7735 Group’s Vss line on the system. (Refer to section “Appendix 8. Countermeasure examples against noise.”) |
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