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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) 374 Page - Renesas Technology Corp |
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H8SX/1663R 数据表(HTML) 374 Page - Renesas Technology Corp |
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374 / 1504 page  Section 9 Bus Controller (BSC) Rev. 2.00 Sep. 24, 2008 Page 342 of 1468 REJ09B0412-0200 (4) When CKSPE = 1 When the SDRAM space is read, the read data settling cycle can be inserted for one cycle using the clock suspend mode. To enter the clock suspend mode, set the OEE bit in DRAMCR to 1, and connect the CKE pin. Figure 9.88 shows an output timing example of the DACK and EDACK signals when CKSPE = 1 with DDS = 1, EDDS = 1, DKC = 0 and EDKC = 0. T p T r T c1 T cl T sp T c2 T c1 T cl T sp T c2 CS Precharge-sel RAS CAS WE CKE PALL ACTV READ READ NOP NOP DQMLU DQMLL D7 to D0 BS DACK or EDACK RD/ WR D15 to D8 SDRAM φ Address bus Row address Column address 2 Column address 1 Row address Figure 9.88 Output Timing Example of DACK and EDACK when CKSPE = 1 (Read, CAS Latency = 2) |
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