Routing Requirements; Source Synchronous Length Matching; Data Group Length Matching; Source Synchronous Termination Requirements - Intel 80331 Design Manual

I/o processor
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7.4.1.1

Routing Requirements

Table 34
for the source synchronous signal group.
Figure 36.

Source Synchronous Length Matching

Note: Datagroup Matching X = Y ± 250 Y mils
Table 34.

Source Synchronous Termination Requirements

Figure 37.

Data Group Length Matching

and
Table
35, and
Figure 36andFigure 37
Datagroup 1:
8 DQ Lines
1 DQS Line
DQ Line
DQ Line
DQ Line
®
Intel
DQ Line
80331
I/O
DQ Line
Processor
DQ Line
DQ Line
DQ Line
DQ Line
Datagroup 2:
8 DQ Lines
DQS Line
DDR SDRAM
Length DQ = x±1.0"
Length DQS = x±1.0"
®
Intel
80331
I/O
Processor
CK
CK#
Intel® 80331 I/O Processor Design Guide
show the routing and termination requirements
Rs
DQ Length = X ± 25 mils
Rs
DQS Length = X mils
Rs
Rs
DQS Length = Y mils
R Series
22.1 +/- 5% ohms
CK Length = x
CK# Length = x
Memory Controller
VTT
Rp
VTT
Rp
VTT
Rp
VTT
DQ Length =
Y ± 25 mils
Rp
VTT
Rp
B1438-01
R Parallel
51.1 +/- 5% ohms
DDR DIMM
B1614-02
73

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