12. DDR2-SDRAM Interface (DBSC2)
Rev.1.00 Jan. 10, 2008 Page 486 of 1658
REJ09B0261-0100
12.4.4
SDRAM Configuration Setting Register (DBCONF)
The SDRAM configuration setting register (DBCONF) is a readable/writable register. It is
initialized only upon power-on reset.
16
17
18
19
20
21
22
23
24
25
26
27
28
29
31
30
0
1
0
1
1
0
0
1
0
0
0
0
0
0
0
0
SPILT0
SPILT1
SPILT2
SPILT3
SPILT4
SPILT5
SPILT6
SPILT7
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R
R
R
R
BIt:
Initial value:
R/W:
0
1
2
3
4
5
6
7
8
9
10
11
12
13
15
14
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
BWID
TH0
BWID
TH1
⎯
⎯
⎯
⎯
⎯
⎯
BASFT0
BASFT1
⎯
⎯
⎯
⎯
⎯
⎯
R/W
R/W
R
R
R
R
R
R
R/W
R/W
R
R
R
R
R
R
BIt:
Initial value:
R/W:
Bit Bit
Name
Initial
Value R/W
Description
31 to 24
⎯
All 0
R
Reserved
These bits are always read as 0. The write value should
always be 0.
Operation when a value other than 0 is written is not
guaranteed.
23 to 16 SPLIT7 to
SPLIT0
1001 1010 R/W
Memory Configuration Select Bits
These bits select the memory configuration to be used.
These are used in combination with the BASFT and the
BWIDTH bits. For details on address multiplexing, refer
to section 12.5.6, Regarding Address Multiplexing.
1001 1010: 256-Mbit product (16M
×
16 bits)
1001 1011: 512-Mbit product (32M
×
16 bits)
1101 1011: 1-Gbit product (64M
×
16 bits)
1110 0011: 2-Gbit product (128M
×
16 bits)
0001 1011: 256-Mbit product (32M
×
8 bits)
0010 0011: 512-Mbit product (64M
×
8 bits)
0110 0011: 1-Gbit product (128M
×
8 bits)
0110 1011: 2-Gbit product (256M
×
8 bits)
Other than above: Setting prohibited (If specified,
correct operation cannot be
guaranteed.)
Содержание SH7781
Страница 4: ...Rev 1 00 Jan 10 2008 Page iv of xxx REJ09B0261 0100 ...
Страница 74: ...2 Programming Model Rev 1 00 Jan 10 2008 Page 44 of 1658 REJ09B0261 0100 ...
Страница 272: ...8 Caches Rev 1 00 Jan 10 2008 Page 242 of 1658 REJ09B0261 0100 ...
Страница 376: ...10 Interrupt Controller INTC Rev 1 00 Jan 10 2008 Page 346 of 1658 REJ09B0261 0100 ...
Страница 694: ...13 PCI Controller PCIC Rev 1 00 Jan 10 2008 Page 664 of 1658 REJ09B0261 0100 ...
Страница 762: ...14 Direct Memory Access Controller DMAC Rev 1 00 Jan 10 2008 Page 732 of 1658 REJ09B0261 0100 ...
Страница 788: ...15 Clock Pulse Generator CPG Rev 1 00 Jan 10 2008 Page 758 of 1658 REJ09B0261 0100 ...
Страница 828: ...17 Power Down Mode Rev 1 00 Jan 10 2008 Page 798 of 1658 REJ09B0261 0100 ...
Страница 846: ...18 Timer Unit TMU Rev 1 00 Jan 10 2008 Page 816 of 1658 REJ09B0261 0100 ...
Страница 1292: ...24 Multimedia Card Interface MMCIF Rev 1 00 Jan 10 2008 Page 1262 of 1658 REJ09B0261 0100 ...
Страница 1326: ...25 Audio Codec Interface HAC Rev 1 00 Jan 10 2008 Page 1296 of 1658 REJ09B0261 0100 ...
Страница 1482: ...28 General Purpose I O Ports GPIO Rev 1 00 Jan 10 2008 Page 1452 of 1658 REJ09B0261 0100 ...
Страница 1538: ...30 User Debugging Interface H UDI Rev 1 00 Jan 10 2008 Page 1508 of 1658 REJ09B0261 0100 ...
Страница 1688: ...Appendix Rev 1 00 Jan 10 2008 Page 1658 of 1658 REJ09B0261 0100 ...
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Страница 1692: ...SH7785 Hardware Manual ...