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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) 337 Page - Renesas Technology Corp |
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H8SX1663 数据表(HTML) 337 Page - Renesas Technology Corp |
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337 / 1158 page  Section 6 Bus Controller (BSC) Rev.1.00 Jun. 07, 2006 Page 285 of 1102 REJ09B0294-0100 (2) When DDS = 0 Single address transfer by the DMAC takes place as a full access (normal access) to the SDRAM space. The DACK signal is asserted within the Tr cycle and the BS signal is also asserted in the Tr cycle. When the SDRAM space is accessed with other than the single address transfer by the DMAC, a fast-page access is available. Figures 6.84 and 6.85 show an output timing example of the DACK signal when DDS = 0. T p T r T c1 T c2 Address bus Row address Column address SD φ CS Precharge-sel RAS CAS WE CKE PALL ACTV WRIT NOP DQMLU DQMLL D7 to D0 BS RD/ WR D15 to D8 Row address High DACK Figure 6.84 Output Timing Example of DACK when DDS = 0 (Write) |
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