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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) 305 Page - Renesas Technology Corp |
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H8SX1663 数据表(HTML) 305 Page - Renesas Technology Corp |
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305 / 1158 page  Section 6 Bus Controller (BSC) Rev.1.00 Jun. 07, 2006 Page 253 of 1102 REJ09B0294-0100 (2) When DDS = 0 Single address transfer by the DMAC takes place as a full access (normal access). The DACK signal is asserted within the Tr cycle and the BS signal is also asserted during the Tr cycle. When the DRAM space is accessed with other than the single address transfer by the DMAC, a fast-page access is available. Figure 6.59 shows an output timing example of the DACK signal when DDS = 0. T p T r T c1 T c2 T c3 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 DACK BS RD/ WR When DKC = 1 When DKC = 0 Figure 6.59 Output Timing Example of DACK when DDS = 0 (RAST = 0, CAST = 1) |
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