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H8S2245 датащи(PDF) 198 Page - Renesas Technology Corp |
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H8S2245 датащи(HTML) 198 Page - Renesas Technology Corp |
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198 / 818 page ![]() Section 6 Bus Controller Rev.3.00 Mar. 26, 2007 Page 156 of 772 REJ09B0355-0300 6.5.4 Basic Timing (1) 8-Bit 2-State Access Space Figure 6.10 shows the bus timing for an 8-bit 2-state access space. When an 8-bit access space is accessed, the upper half (D 15 to D8) of the data bus is used. The LWR pin is fixed high. Wait states cannot 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 Note: n = 0 to 3 High Figure 6.10 Bus Timing for 8-Bit 2-State Access Space |
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