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SH7041A датащи(PDF) 205 Page - Renesas Technology Corp |
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SH7041A датащи(HTML) 205 Page - Renesas Technology Corp |
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205 / 923 page ![]() 167 10.1.5 Address Map Figure 10.2 shows the address format used by the SH7040 Series. A31–A24 A23, A22 A21 Output address: Output from the address pins Space selection: Not output externally; used to select the type of space On-chip ROM space or CS space when 00000000 (H'00) DRAM space when 00000001 (H'01) Reserved (do not access) when 00000010 to 11111110 (H'02 to H'FE) On-chip peripheral module space or on-chip RAM space when 11111111 (H'FF) CS space selection: Decoded, outputs CS0 to CS3 when A31 to A24 = 00000000 A0 Figure 10.2 Address Format This LSI uses 32-bit addresses: • A31–A24 are used to select the type of space and are not output externally. • Bits A23 and A22 are decoded and output as chip select signals (CS0–CS3) for the corresponding areas when bits A31–A24 are 00000000. • A21–A0 are output externally. Table 10.3 shows an address map for on-chip ROM effective mode. Table 10.4 shows an address map for on-chip ROM ineffective mode. |
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