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H8S2245 датащи(PDF) 203 Page - Renesas Technology Corp |
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H8S2245 датащи(HTML) 203 Page - Renesas Technology Corp |
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203 / 818 page ![]() Section 6 Bus Controller Rev.3.00 Mar. 26, 2007 Page 161 of 772 REJ09B0355-0300 (4) 16-Bit 3-State Access Space Figures 6.15 to 6.17 show bus timings for a 16-bit 3-state access space. When a 16-bit access space is accessed, the upper half (D 15 to D8) of the data bus is used for the odd address, and the lower half (D 7 to D0) for the even address. Wait states can be inserted. Bus cycle T1 T2 Address bus φ CSn AS RD D15 to D8 Valid D7 to D0 Invalid Read HWR LWR D15 to D8 Valid D7 to D0 High impedance Write High Note: n = 0 to 3 T3 Figure 6.15 Bus Timing for 16-Bit 3-State Access Space (1) (Even Address Byte Access) |
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