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H8/3003 数据表(PDF) 136 Page - Renesas Technology Corp |
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H8/3003 数据表(HTML) 136 Page - Renesas Technology Corp |
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136 / 715 page  16-Bit, Two-State-Access Areas: Figures 6-9 to 6-11 show the timing of bus control signals for a 16-bit, two-state-access area. In these areas, the upper address bus (D15 to D8) is used to access even addresses and the lower address bus (D7 to D0) is used to access odd addresses. Wait states cannot be inserted. Figure 6-9 Bus Control Signal Timing for 16-Bit, Two-State-Access Area (1) (Byte Access to Even Address) ø Address bus CS AS RD D to D D to D HWR LWR D to D D to D 15 8 7 0 15 8 7 0 n T1 T2 Read access Write access Note: n = 7 to 0 Valid Undetermined data High Valid Invalid Bus cycle Even external address in area n 118 |
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