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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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H8SX1663 数据表(PDF) 282 Page - Renesas Technology Corp |
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H8SX1663 数据表(HTML) 282 Page - Renesas Technology Corp |
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282 / 1158 page  Section 6 Bus Controller (BSC) Rev.1.00 Jun. 07, 2006 Page 230 of 1102 REJ09B0294-0100 6.10.5 Basic Timing Figure 6.38 shows a basic access timing of the DRAM space. A basic bus cycle consists of four clock cycles: one precharge cycle (Tp), one row address output cycle (Tr), and two column address output cycles (Tc1 and Tc2). The RD signal is output to DRAM as an OE signal on a DRAM access. When DRAM with the EDO page mode function is in use, connect the OE signal to the OE pin of the DRAM. T p T r T c1 T c2 Address bus Row address Column address B φ RAS LUCAS LLCAS WE OE (RD) WE OE (RD) Data bus High High Read Write Data bus BS RD/ WR Figure 6.38 DRAM Basic Access Timing (RAS = 0 and CAST = 0) |
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