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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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HD6432351 Scheda tecnica(PDF) 210 Page - Renesas Technology Corp |
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HD6432351 Scheda tecnica(HTML) 210 Page - Renesas Technology Corp |
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210 / 1025 page  Section 6 Bus Controller Rev. 3.00 Sep 15, 2006 page 176 of 988 REJ09B0330-0300 6.6 DMAC Single Address Mode and DRAM Interface When burst mode is selected with the DRAM interface, the DACK output timing can be selected with the DDS bit. When DRAM space is accessed in DMAC single address mode at the same time, whether or not burst access is to be performed is selected. 6.6.1 When DDS = 1 Burst access is performed by determining the address only, irrespective of the bus master. The DACK output goes low from the T C1 state in the case of the DRAM interface. Figure 6.28 shows the DACK output timing for the DRAM interface when DDS = 1. Tp φ Read Write CSn (RAS) HWR, (WE) D15 to D0 HWR, (WE) DACK D15 to D0 A23 to A0 Tr Tc1 Tc2 Row Column CAS, (UCAS) LCAS (LCAS) Figure 6.28 DACK DACK DACK DACK Output Timing when DDS = 1 (Example of DRAM Access) |
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