Intel BX80605I7870 Data Sheet - Page 85

MC_DOD_CH1_0, MC_DOD_CH1_1, MC_DOD_CH1_2

Page 85 highlights

Register Description 2.11.2 MC_DOD_CH1_0, MC_DOD_CH1_1, MC_DOD_CH1_2 Channel 1 DIMM Organization Descriptor Register. Device: 5 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 RANKOFFSET. Rank Offset for calculating RANK. This field corresponds to the first logical rank on the DIMM. The rank offset is 0 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. NUMBANK. Defines the number of (real, not shadow) banks on these DIMMs. 0 00 = Four-banked 01 = Eight-banked 10 = Sixteen-banked NUMRANK. Number of Ranks. Defines the number of ranks on these DIMMs. 00 = Single Ranked 0 01 = Double Ranked 10 = Quad Ranked NUMROW. Number of Rows. Defines the number of rows within these DIMMs. 000 = 2^12 Rows 0 001 = 2^13 Rows 010 = 2^14 Rows 011 = 2^15 Rows 100 = 2^16 Rows NUMCOL. Number of Columns. Defines the number of columns within on these DIMMs. 0 00 = 2^10 columns 01 = 2^11 columns 10 = 2^12 columns 11 = RSVD. Datasheet 85

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98

Datasheet
85
Register Description
2.11.2
MC_DOD_CH1_0, MC_DOD_CH1_1, MC_DOD_CH1_2
Channel 1 DIMM Organization Descriptor Register.
Device:
5
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.
Number of Ranks. Defines the number of ranks on these DIMMs.
00 = Single Ranked
01 = Double Ranked
10 = Quad Ranked
4:2
RW
0
NUMROW.
Number of Rows.
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.
Number of Columns.
Defines the number of columns within on these DIMMs.
00 = 2^10 columns
01 = 2^11 columns
10 = 2^12 columns
11 = RSVD.