Cpc Group Package Length Table; Figure 51. Cpc Signals To Clock Length Matching Diagram; Table 38. Cpc Group Package Lengths - Intel 855GM Design Manual

System Memory Design Guidelines (DDR-SDRAM) for SO-DIMM configuration

Figure 51. CPC Signals to Clock Length Matching Diagram

GMCH Package
Note: All lengths are measured from GMCH
die pad to SO-DIMM connector pad.
GMCH Package
Note: All lengths are measured from GMCH
die pad to SO-DIMM connector pad.
6.3.7.4.

CPC Group Package Length Table

The package length data in the table below should be used to match the overall length of each CPC
signal to it's associated clock reference length.

Table 38. CPC Group Package Lengths

Signal
SMA[1]
SMA[2]
SMA[4]
SMA[5]
114
SMA[5,4,2,1]
GMCH
Die
SCK[2:0]
SCK#[2:0]
SMAB[5,4,2,1]
GMCH
Die
SCK[5:3]
SCK#[5:3]
Pin Pkg Length
Number (mils)
AD14 398
AD13 443
AD11 430
AC13 346
SO-DIMM0
CPC Length = Y0
Clock Reference Length = X0
SO-DIMM0 SO-DIMM1
Pin
Signal
Number
SMAB[1] AD16
SMAB[2] AC12
SMAB[4] AF11
SMAB[5] AD10
®
Intel 855GM/855GME Chipset Platform Design Guide
CPC Length = Y1
Clock Ref Length = X1
Pkg Length
(mils)
427
395
716
631
R