Intel BX80605I7870 Data Sheet - Page 86

MC_DOD_CH2_0, MC_DOD_CH2_1, MC_DOD_CH2_2

Page 86 highlights

Register Description 2.11.3 MC_DOD_CH2_0, MC_DOD_CH2_1, MC_DOD_CH2_2 Channel 2 DIMM Organization Descriptor Register. Device: 6 Function: 1 Offset: 48h, 4Ch, 50h Access as a Dword Bit 12:10 9 8:7 6:5 4:2 1:0 Type RW RW RW RW RW RW Reset Value Description 0 RANKOFFSET. Rank Offset for calculating RANK. This field corresponds to the first logical rank on the DIMM. The rank offset is always programmed to 0 for the DIMM 0 DOD registers. (DIMM 0 rank offset is always 0.) DIMM 1 DOD rank offset is either 4 for two DIMMs per channel or 2 if there are three DIMMs per channel. DIMM2 DOD rank offset is always 4 as it is only used in three DIMMs per channel case. 0 DIMMPRESENT. DIMM slot is populated. 0 NUMBANK. Defines the number of (real, not shadow) banks on these DIMMs. 00 = Four-banked 01 = Eight-banked 10 = Sixteen-banked 0 NUMRANK. Defines the number of ranks on these DIMMs. 00 = Single Ranked 01 = Double Ranked 10 = Quad Ranked 0 NUMROW. Defines the number of rows within these DIMMs. 000 = 2^12 Rows 001 = 2^13 Rows 010 = 2^14 Rows 011 = 2^15 Rows 100 = 2^16 Rows 0 NUMCOL. Defines the number of columns within on these DIMMs. 00 = 2^10 columns 01 = 2^11 columns 10 = 2^12 columns 11 = RSVD 86 Datasheet

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Register Description
86
Datasheet
2.11.3
MC_DOD_CH2_0, MC_DOD_CH2_1, MC_DOD_CH2_2
Channel 2 DIMM Organization Descriptor Register.
Device:
6
Function: 1
Offset:
48h, 4Ch, 50h
Access as a Dword
Bit
Type
Reset
Value
Description
12:10
RW
0
RANKOFFSET
. Rank Offset for calculating RANK.
This field corresponds to the first logical rank on the DIMM. The rank offset is
always programmed to 0 for the DIMM 0 DOD registers. (DIMM 0 rank offset is
always 0.) DIMM 1 DOD rank offset is either 4 for two DIMMs per channel or 2 if
there are three DIMMs per channel. DIMM2 DOD rank offset is always 4 as it is
only used in three DIMMs per channel case.
9
RW
0
DIMMPRESENT.
DIMM slot is populated.
8:7
RW
0
NUMBANK.
Defines the number of (real, not shadow) banks on these DIMMs.
00 = Four-banked
01 = Eight-banked
10 = Sixteen-banked
6:5
RW
0
NUMRANK.
Defines the number of ranks on these DIMMs.
00 = Single Ranked
01 = Double Ranked
10 = Quad Ranked
4:2
RW
0
NUMROW.
Defines the number of rows within these DIMMs.
000 = 2^12 Rows
001 = 2^13 Rows
010 = 2^14 Rows
011 = 2^15 Rows
100 = 2^16 Rows
1:0
RW
0
NUMCOL.
Defines the number of columns within on these DIMMs.
00 = 2^10 columns
01 = 2^11 columns
10 = 2^12 columns
11 = RSVD