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HD6432351 bảng dữ liệu(PDF) 195 Page - Renesas Technology Corp

tên linh kiện HD6432351
Giải thích chi tiết về linh kiện  16-Bit Single-Chip Microcomputer
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nhà sản xuất  RENESAS [Renesas Technology Corp]
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HD6432351 bảng dữ liệu(HTML) 195 Page - Renesas Technology Corp

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Section 6 Bus Controller
Rev. 3.00 Sep 15, 2006 page 161 of 988
REJ09B0330-0300
6.5
DRAM Interface
6.5.1
Overview
When the H8S/2350 Group is in advanced mode, external space areas 2 to 5 can be designated as
DRAM space, and DRAM interfacing performed. With the DRAM interface, DRAM can be
directly connected to the H8S/2350 Group. A DRAM space of 2, 4, or 8 Mbytes can be set by
means of bits RMTS2 to RMTS0 in BCRH. Burst operation is also possible, using fast page mode.
6.5.2
Setting DRAM Space
Areas 2 to 5 are designated as DRAM space by setting bits RMTS2 to RMTS0 in BCRH. The
relation between the settings of bits RMTS2 to RMTS0 and DRAM space is shown in table 6.5.
Possible DRAM space settings are: one area (area 2), two areas (areas 2 and 3), and four areas
(areas 2 to 5).
Table 6.5
Settings of Bits RMTS2 to RMTS0 and Corresponding DRAM Spaces
RMTS2
RMTS1
RMTS0
Area 5
Area 4
Area 3
Area 2
0
1
Normal space
DRAM space
0
Normal space
DRAM space
0
1
1
DRAM space



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