GL800HT25 USB 2.0 UTMI Compliant Transceiver IP Core

©2000-2003 Genesys Logic Inc.—All rights reserved.

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CHAPTER 1

GENERAL DESCRIPTION

GL800HT25 is a high performance USB 2.0 Transceiver compliant with the UTMI (USB 2.0 Transceiver

Macrocell Interface) Specification proposed by Intel. The UTMI specification defines a standard interface to

USB 2.0 high-speed transceivers that enables common design across prototype and production

implementations.

The GL800HT25 integrates high-speed, mixed-signal circuitry to serve as the interface between the high

performance USB serial bus and the 16-bit SIE bus. The transceiver is controlled by input signals from the SIE

bus, which is synchronized with the 30MHz clock output. The UTMI transceiver handles the low level USB

protocol and signaling. This includes features such as: data serialization and deserialization, bit stuffing and

clock recovery and synchronization. The primary focus of the UTMI transceiver is to shift the clock domain of

the data from the USB 2.0 rate to one that is compatible with the general logic.

To eliminate the difficult high-speed, mixed-signal USB 2.0 logic design for system and peripheral developers,

the GL800HT25 with standard UTMI and 40X improvement in data rate can be easily adapted for

implementation of USB 2.0 high speed compliant design of widely applications, including scanners, printers,

portable storage, external CD-ROM / CD-RW / DVD-ROM, flash card readers, and PC cameras. The IP block

now is certified and available on the 0.35µm UMC standard CMOS process; and it is also scheduled for

0.25µm TSMC standard CMOS process in 3Q’02.