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AR# 22309

MIG 1.3/1.4 - Is the DQS strobe numbering directly compatible with the DIMM device?

Description

Keywords: data, dq, compatibility

Is the DQS strobe numbering directly compatible with the DIMM device?

Solution

The numbering in MIG code is not compatible with the numbering of DQS on the DIMM device.

Listed below is the cross-reference for all 36 DQS signals on ML461 with respect to the numbering called out by MIG for the 144-bit code for 4:1 DQ:DQS ratio.


Byte.......Bits...........DIMM#...............DIMM DQS..........MIG Code DQS#
0..............00:03.........0..........................0..............................0
0..............04:07.........0..........................9..............................1
1..............08:11.........0..........................1..............................2
1..............12:15.........0..........................10............................3
2.................................0..........................2..............................4
2.................................0..........................11............................5
3.................................0..........................3..............................6
3.................................0..........................12............................7
4.................................0..........................4..............................8
4.................................0..........................13............................9
5.................................0..........................5..............................10
5.................................0..........................14............................11
6.................................0..........................6..............................12
6.................................0..........................15............................13
7.................................0..........................7..............................14
7.................................0..........................16............................15
Chk 0........................0...........................8..............................16
Chk 0........................0..........................17.............................17
8.................................1..........................0...............................18
8.................................1..........................9...............................19
9.................................1..........................1...............................20
9.................................1..........................10.............................21
10...............................1..........................2...............................22
10...............................1..........................11.............................23
11...............................1..........................3...............................24
11...............................1..........................12.............................25
12...............................1..........................4...............................26
12...............................1..........................13.............................27
13...............................1..........................5...............................28
13...............................1..........................14.............................29
14...............................1..........................6...............................30
14...............................1..........................15.............................31
15...............................1..........................7...............................32
15...............................1..........................16.............................33
Chk 1........................1...........................8...............................34
Chk 1........................1...........................17.............................35
AR# 22309
Date Created 09/04/2007
Last Updated 04/06/2009
Status Archive
Type General Article