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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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H8SX/1663 데이터시트(PDF) 339 Page - Renesas Technology Corp |
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H8SX/1663 데이터시트(HTML) 339 Page - Renesas Technology Corp |
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339 / 1158 page  Section 6 Bus Controller (BSC) Rev.1.00 Jun. 07, 2006 Page 287 of 1102 REJ09B0294-0100 (3) When TRWL = 1 When the SDRAM interface is written to, one Trwl cycle is inserted after the Tc2 cycle. The DACK signal stays asserted until the end of the Trwl cycle. The hold time of data output from an external device can be extended by one cycle. Figure 6.86 shows an output timing example of the DACK signal when TRWL = 1 with DDS = 1 and DKC = 0. T p T r T c1 T c2 T rwl T c1 T c2 T rwl SD φ Address bus Row address Column address 2 Column address 1 CS Precharge-sel RAS CAS WE CKE PALL ACTV NOP NOP WRIT WRIT NOP DQMLU DQMLL D7 to D0 BS DACK RD/ WR D15 to D8 Row address High Figure 6.86 Output Timing Example of DACK when TRWL = 1 (Write) |
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