Intel 440GX - 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