Specifications

94 Intel

Atom™ processor CE4100 Ref# 420826

Platform Design Guide

Intel Confidential

8.2 USB 2.0

The Universal Serial Bus (USB) is a cable bus that supports data exchange between a host

computer and a wide range of simultaneously accessible peripherals. The attached

peripherals share USB bandwidth through a host-scheduled, token-based protocol. The bus

allows peripherals to be attached, configured, used, and detached while the host and other

peripherals are in operation.

The Intel

Atom™ processor CE4100 supports dual USB 2.0 host ports to connect variety of

devices.

Note

Please also refer to www.usb.org for detail high speed USB electrical design guide.

8.2.1 Detailed USB2.0 Routing Requirements

Figure 8-4. USB2.0 Topology for Back Panel

Via

out1p

out1n

45 ohm

out2p

out2n

TL1

TL2

Vcc

Gnd

USB common

mode Choke

TL3

Testing

fixture

TP2

Figure 8-5. USB2.0 Topology for Front END Board (FEB)

TL1

TL41

TL2

Via

TL42

SDV