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HD6432351 Datasheet(PDF) 211 Page - Renesas Technology Corp

No. de pieza HD6432351
Descripción Electrónicos  16-Bit Single-Chip Microcomputer
PDF  1025 Pages
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Fabricante Electrónico  RENESAS [Renesas Technology Corp]
Página de inicio  http://www.renesas.com
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HD6432351 Datasheet(HTML) 211 Page - Renesas Technology Corp

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Section 6 Bus Controller
Rev. 3.00 Sep 15, 2006 page 177 of 988
REJ09B0330-0300
6.6.2
When DDS = 0
When DRAM space is accessed in DMAC single address mode, full access (normal access) is
always performed. The
DACK output goes low from the T
r state in the case of the DRAM
interface.
In modes other than DMAC single address mode, burst access can be used when accessing DRAM
space.
Figure 6.29 shows the
DACK output timing for the DRAM interface when DDS = 0.
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 6.29
DACK
DACK
DACK
DACK Output Timing when DDS = 0 (Example of DRAM Access)



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