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M16C/1N датащи(PDF) 55 Page - Renesas Technology Corp |
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M16C/1N датащи(HTML) 55 Page - Renesas Technology Corp |
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55 / 238 page ![]() Rev.1.00 Oct 20, 2004 page 43 of 222 M16C/1N Group 9. Bus Control REJ09B0007-0100Z The memory areas and the SFR area also have different bus widths. The memory areas have a 16-bit bus width, while the SFR area has an 8-bit bus width. Consequently, different operations are used when the areas are accessed in word (16 bits) units. Table 9.2 lists access unit and bus operation. Space Even address byte access BCLK Data BCLK BCLK BCLK BCLK BCLK BCLK BCLK Address SFR ROM/RAM (No wait setting) Even Odd Data Data Data Data Word Data Data Data Data Data Data Data Odd Odd Odd+1 Odd Odd+1 Even Even Even+1 Even/even+1 Data Address Data Address Data Address Data Address Data Address Data Address Data Address Odd address byte access Even address word access Odd address word access Table 9.2 Access unit and bus operation |
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