product brief
Overview
The JM20338 is single chip solution to bridge between USB 2.0, SATA and ATA/ATAPI-based mass storage device. It provides the capability to translate USB 2.0 mass storage and SATA protocols to ATA/ATAPI commands. The USB adheres to the Mass Storage Class Bulk-Only Transport Specification, and supports dual LUN operation. The embedded command parser supports both ATA and ATAPI command set with LBA48 bit addressing capability.
Feature
Compliance
• Serial ATA 1.0 Specification compliant
Overall
• Automatic Serial ATA 3.0/1.5 Gbps speed negotiation
• ATA/ATAPI PIO mode 0 to 4
• ATA/ATAPI Ultra DMA of transfer rate 16.7, 25, 33, 48, 66, 100, 133, and 150MB/s.
• ATA/ATAPI LBA48 addressing mode associated with 2-byte sector count
• Support Serial ATA hot-plug
• Ultra low power consumption
• Work for both AC and DC couple between the transmitter and the receiver
• Provide specified OOB signal detection and transmission
• Support Spread Spectrum Clocking to reduce EMI
• Support 20MHz, 25MHz, 30MHz or 40MHz Reference Clock
• Support Partial/Slumber power management
• Provide adjustable TX signal amplitude and pre-emphasis level
• Master/Slave support
• Support operation system :
• Microsoft Windows 98
• Microsoft Windows ME, 2000, XP, 2003, Media Center, and later
• Mac OS 9.22 and above
