JG82875 S L8DB Intel, JG82875 S L8DB Datasheet - Page 113

• Manufacturer Part Number: JG82875 S L8DB
• Manufacturer: Intel

Specifications of JG82875 S L8DB

• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

3.9.2
Intel
®
82875P MCH Datasheet
DRA— DRAM Row Attribute Register (Device 6, MMR)
Address Offset:
Default Value:
Access:
Size:
The DRAM Row Attribute registers define the page sizes to be used when accessing different rows
or pairs of rows. The minimum page size of 4 KB occurs when in single-channel mode and either
128-Mb, x16 devices are populated or 256-Mb, x16 devices are populated. The maximum page
size of 32 KB occurs when in dual-channel mode and 512 MB, x8 devices are populated. Each
nibble of information in the DRA registers describes the page size of a row or pair of rows: When
in either of the dual-channel modes, only registers 10h and 11h are used. The page size
programmed reflects the page size for the pair of DIMMS installed. When in single-channel mode,
registers 10h and 11h are used to specify page sizes for channel A and registers 12h and 13h are
used to specify page sizes for channel B. If the associated row is not populated, the field must
be left at the default value.
Row0, 1:
Row2, 3:
Row4, 5:
Row6, 7:
Bit
6:4
2:0
Rsvd
Rsvd
Rsvd
Rsvd
7
3
7
7
7
7
Reserved
Row Attribute for Odd-Numbered Row—R/W. This field defines the page size of the
corresponding row. If the associated row is not populated, this field must be left at the default value.
000 = 4 KB
001 = 8 KB
010 = 16 KB
011 = 32 KB
Others = Reserved
Reserved
Row Attribute for Even-Numbered Row—R/W. This field defines the page size of the
corresponding row. If the associated row is not populated, this field must be left at the default value.
000 = 4 KB
001 = 8 KB
010 = 16 KB
011 = 32 KB
Others = Reserved
0010h
0011h
0012h
0013h
6
6
6
6
0010h
00h
RO, R/W
8 bits each register
Row Attribute for Row 1
Row Attribute for Row 3
Row Attribute for Row 5
Row Attribute for Row 7
—
0013h
4
4
4
4
Description
Rsvd
Rsvd
Rsvd
Rsvd
3
3
3
3
2
2
2
2
Row Attribute for Row 0
Row Attribute for Row 2
Row Attribute for Row 4
Row Attribute for Row 6
Register Description
113
0
0
0
0