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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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H8SX/1663R Datenblatt(PDF) 337 Page - Renesas Technology Corp |
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H8SX/1663R Datenblatt(HTML) 337 Page - Renesas Technology Corp |
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337 / 1504 page  Section 9 Bus Controller (BSC) Rev. 2.00 Sep. 24, 2008 Page 305 of 1468 REJ09B0412-0200 (2) When DDS = 0 or EDDS = 0 Single address transfer by the DMAC or EXDMAC takes place as a full access (normal access). The DACK and EDACK signals are asserted within the Tr cycle and the BS signal is also asserted during the Tr cycle. When the DRAM space is accessed with other than the single address transfer by the DMAC or EXDMAC, a fast-page access is available. Figure 9.59 shows an output timing example of the DACK and EDACK signals when DDS = 0 or EDDS = 0. DACK or EDACK DKC, EDKC = 1 DKC, EDKC = 0 T p T r T c1 T c2 T c3 Address bus Row address Column address B φ RAS LUCAS LLCAS WE OE (RD) WE OE (RD) Data bus High High Read Write Data bus BS RD/ WR Figure 9.59 Output Timing Example of DACK and EDACK when DDS = 0 or EDDS = 0 (RAST = 0, CAST = 1) |
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