EP80579 Datasheet, PDF (423/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
Table 16-44. Offset 70h: DRA[0-1] - DRAM Row [0:1] Attribute Register (Sheet 2 of 2)
Description:
View: PCI
BAR: Configuration
Bus:Device:Function: 0:0:0
Offset Start: 70h at 4h
Offset End: 73h at 4h
Size: 32 bit
Default: 00000515h
Power Well: Core
Bit Range Bit Acronym
Bit Description
Number of Columns for even numbered row. This
information is used by the Mbist engine.
Sticky
Bit Reset
Value
Bit Access
22 :20
NC_EVEN
000
001
010
011
Others
1024
2048
4096
8192
Reserved
N
000b
RW
Note that this field should be programmed to be consistent
with the DIMMTECH fields of the DRA register.
19 :18
Reserved Reserved
N
00b
RO
Device Type:
Bios sets these bits according to information read
pertaining to the DIMMs installed
17 :14
DTYPE
bit 17: single or dual rank DIMM (0=single rank per DIMM) N
0000b
RW
bit 16: DDR2 (0=DDR2)
bit 15: 32 or 64 bit DDR populated (0=64bits)
bit 14: unbuffered or registered DIMM (0=unbuffered)
13 :12
Reserved Reserved
N
00b
RO
Device Width for odd-numbered row:
11 :10
DWODD
Functionality and encoding is exactly the same as
DWEVEN. This value should be set to exactly the same as
N
01b
RW
DWEVEN.
09 :06
DIMMTECH_OD
D
DIMM technology for odd-numbered row.
Functionality and encoding is exactly the same
DIMMTECH_EVEN (bits 3:0)
as
N
0100b
RW
Device Width for even-numbered row: BIOS sets this
bit according to the width of the DDR2 SDRAM devices
populated in this row. This is used to determine the page
size and the DQS to DQ signal mapping.
05 :04
DWEVEN _{00 = Reserved}
N
01b
RW
01 = x8 DDR2 (1 strobe pair per byte)
10 = Reserved
11 = Reserved
DIMM technology for even-numbered row: BIOS sets
this bit according to the density of the DDR devices
populated in this row. This is used along with the device
width and the DTYPE to determine the page size and the
DQS to DQ signal mapping.
03 :00
DIMMTECH_EV 0000 = reserved
EN
0011 = 2Gb DIMM
N
0101b
RW
0100 = 1Gb DIMM
0101 = 512Mb DIMM
0110 = 256Mb DIMM
others - reserved
August 2009
Order Number: 320066-003US
Intel^® EP80579 Integrated Processor Product Line Datasheet
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