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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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H8SX/1663R 数据表(PDF) 369 Page - Renesas Technology Corp |
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H8SX/1663R 数据表(HTML) 369 Page - Renesas Technology Corp |
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369 / 1504 page  Section 9 Bus Controller (BSC) Rev. 2.00 Sep. 24, 2008 Page 337 of 1468 REJ09B0412-0200 (1) When DDS = 1 or EDDS = 1 A fast-page access is performed regardless of the bus master, only according to the address. The DACK and EDACK signals are asserted within the Tc1 cycle in both read and write accesses. Figures 9.83 and 9.84 show the output timing example of the DACK and EDACK signals when DDS = 1 or EDDS = 1. T p T r T c1 T c2 T c1 T c2 CS Precharge-sel RAS CAS WE CKE PALL ACTV NOP NOP WRIT WRIT DQMLU DQMLL D7 to D0 BS DACK or EDACK RD/ WR D15 to D8 Address bus Row address Row address Column address 1 Column address 2 SDRAM φ High Figure 9.83 Output Timing Example of DACK and EDACK when DDS = 1 or EDDS = 1 (Write) |
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