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H8SX1663 Datasheet(PDF) 341 Page - Renesas Technology Corp |
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H8SX1663 Datasheet(HTML) 341 Page - Renesas Technology Corp |
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341 / 1158 page  Section 6 Bus Controller (BSC) Rev.1.00 Jun. 07, 2006 Page 289 of 1102 REJ09B0294-0100 (5) When DKC = 1 With DKC = 1, the DACK signal is asserted a half cycle earlier compared to the case when DKC = 0. In fast-page access, the DACK signal continues to be low. In this case, bus cycles can be distinguished by the BS output timing. Figure 6.88 shows an output timing example of the DACK signal when DKC = 1 and DDS = 1. Figure 6.89 shows an output timing example of the DACK signal when DKC = 1 and DDS = 0. T p T r T c1 T c2 T c1 T c2 Address bus Row address Column address 2 Column address 1 SD φ CS Precharge-sel RAS CAS WE CKE PALL ACTV NOP NOP WRIT WRIT DQMLU DQMLL D7 to D0 BS DACK RD/ WR D15 to D8 Row address High Figure 6.88 Output Timing Example of DACK when DKC = 1 and DDS = 1 (Write) |
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