JMicron JM20335
The JM20335 is single chip solution to bridge between Hi-Speed USB and ATA/ATAPI-based mass storage device. It provides the capability to translate USB mass storage commands to ATA/ATAPI communication protocol. The USB adheres the Mass Storage Class Bulk-Only Transport Specification, and supports dual LUN operation, which could connect to two ATA/ATAPI devices.DESCRIPTION
The embedded command parser supports both ATA and ATAPI command set with LBA48 addressing capability. This chip is designed by 0.18um CMOS technology with 64 LQFP package .FEATURES
● Compliance with USB 2.0 electrical specification● Support USB High-Speed and Full-Speed Operation
● Compliance with USB Mass Storage Class, Bulk-Only Transport Specification
● Support ATA/ATAPI Ultra DMA Mode 0, 1, 2, 3, 4, 5
● Support ATA/ATAPI Multi-Word DMA Mode 0, 1, 2
● Support ATA/ATAPI PIO Mode 0, 1, 2, 3, 4
● Support ATA/ATAPI PACKET command set
● Support ATA/ATAPI LBA48 addressing mode
● Support dual LUN (Logic Unit Number) with automatically master/slave enumeration
● Support 12MHz external crystal
● Support external NVRAM for Vender Specific VID/PID, Manufacture, Product String of USB Device Controller
● Support SCSI-2 Vender Specific Command for GPIO access
● Support SCSI-2 Vender Specific Command for NVRAM access
● Support SCSI-2 Vender Specific Command for ATA PIO command access...