Version 1.2

May 2004

© JMicron 2003. All rights reserved.

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JMicron/JM20339

JM20339

Hi-Speed USB to SATA Bridge

Description

The JM20339 is single chip solution to bridge between USB 2.0 host and SATA device. The

highly integrated USB 2.0 and SATA Phys technology provides a cost-effective solution to apply USB

to SATA device enclosure. The USB adheres to the Mass Storage Class Bulk-Only Transport

Specification. The embedded command parser supports both ATA and ATAPI command set with

LBA48 bit addressing capability.

Features

Quick Reference

Signal Bit Rate

1.5 Gbps/SATA and 480

Mbps/USB

Spread Spectrum

-0.3% to 0.0

Power Supply

3.3V

ESD Protection

2000 V

Adj. Amplitude

2 levels

Adj. Pre-emphasis

4 levels

Package

64-pin LQFP

• Compliance with Gen1i, and Gen1m of

Serial ATA II Electrical Specification 1.0

• Support SATA spread-spectrum transmitter

• Support SATA II Asynchronous Signal

Recovery (Hot Plug) feature

• Compliance with USB 2.0 (Hi-Speed USB)

electrical specification

• Compliance with USB Mass Storage Class

Bulk-Only Transport Specification

• Support 480Mbps High Speed (HS) and

12Mbps Full Speed USB operation

• Support ATA/ATAPI LBA48 bit addressing

mode

• Support 12MHz external crystal.

• Single-power 3.3V power supply

• 0.18um CMOS technology and 64 -pin LQFP

ASSP package

Applications

USB & SATA products

• Enclosure system

• Storage Subsystem

• Portable compact HDD