Features
• 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

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.