2 single processor recommended trace lengths – Intel 440GX User Manual
Page 31
Intel
®
440GX AGPset Design Guide
2-7
Motherboard Layout and Routing Guidelines
2.3.3.2
Single Processor Recommended Trace Lengths
Single processor trace length recommendations are summarized in
Table 2-1
. The recommended
lengths are derived from the parametric sweeps and Monte Carlo analysis described in the
following section.
NOTE:
1. Refer to the
Intel
®
Pentium
®
II
Processor Specification Update (order number 243337); Specifically, erratum
#42: workaround L1=4.5”.
Intel strongly recommends running analog simulations using the available I/O buffer models
together with layout information extracted from your specific design. Simulation will confirm that
the design adheres to the guidelines.
Table 2-1. Recommended Trace Lengths for Single Processor Design
Trace
Minimum Length
Maximum Length
L1
1.50”
6.75”
1
L3
0.00”
1.50”
L4
0.00”
2.50”
2
Figure 2-8. Solution Space for Single Processor Design (Based on Results of Parametric
Sweeps)
0
1
2
3
4
5
6
7
8
9
10
11
12
0
1
2
L2 [in]
L3
[
in
]
PASS
FAIL