10.4.1.4. Usb 2.0 Termination; 10.4.1.5. Usb 2.0 Trace Length Pair Matching; 10.4.1.6. Usb 2.0 Trace Length Guidelines; Figure 64. Usbrbias Connection - Intel 852GME Design Manual

R

Figure 64. USBRBIAS Connection

Table 65. USBRBIAS/USBRBIAS# Routing Summary

USBRBIAS/ USBRBIAS#
Routing Requirements
5 on 5

10.4.1.4. USB 2.0 Termination

A common-mode choke should be used to terminate the USB 2.0 bus. Place the common-mode choke as
close as possible to the connector pins. See Section 10.4.4 for details.

10.4.1.5. USB 2.0 Trace Length Pair Matching

USB 2.0 signal pair traces should be trace length matched. Max trace length mismatch between USB 2.0
signal pair should be no greater that 150 mils.

10.4.1.6. USB 2.0 Trace Length Guidelines

Table 66. USB 2.0 Trace Length Guidelines (With Common-mode Choke)

Configuration
Back Panel
NOTES:
1. These lengths are based upon simulation results and may be updated in the future.
2. All lengths are based upon using a common-mode choke (see Section 10.4.4.1 for details on common-mode
choke).
® ®
Intel 852GME, Intel 852GMV and Intel
®
Intel
ICH4-M
USBRBIAS
USBRBIAS#
Maximum Trace Length
500 mils
Signal Signal Matching
Referencing
Ground The max mismatch
between data pairs
should not be
greater than 150
mils
®
852PM Chipset Platforms Design Guide
22.6Ω+/- 1%
Signal Length Matching Signal Referencing
N/A N/A
Motherboard Card Trace
Trace Length Length
17 inches N/A
I/O Subsystem
Maximum Total
Length
17 inches
161