Design Guide

System Memory Design Guidelines (DDR-SDRAM) for Memory Down Configuration
R
Intel
®
855GM/855GME Chipset Platform Design Guide 151
7.3.6.4. Command Group Package Length Table
The package length data in Table 53 below should be used to match the overall length of each command
signal to its associated clock reference length.
Table 53. Command Group Package Lengths
Signal Pin Number
Pkg Length
(mils)
SMAA_00 AC18 420
SMAA_03 AD17 472
SMAA_06 AD8 591
SMAA_07 AD7 596
SMAA_08 AC6 630
SMAA_09 AC5 681
SMAA_10 AC19 377
SMAA_11 AD5 683
SMAA_12 AB5 609
SBA[0] AD22 592
SBA[1] AD20 435
SCAS# AC24 562
SRAS# AC21 499
SWE# AD25 751