product brief
Overview
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. 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
Feature
Compliance
• Compliance with USB 2.0 electrical specification
• Compliance with USB Mass Storage Class, Bulk-Only Transport Specification
Overall
• Support USB High-Speed and Full-Speed Operation
• 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
• Support ATA/ATAPI device power down control in USB Suspend mode
• Embedded 3.3V to 1.8V voltage regulator
• Single power 3.3V power supply
• 64 LQFP package
• Support hardware data protection
• Support interface for fingerprint sensor
• Support on line USB firmware update ( e.g. ISP) with Serial Flash
• Up to 24 GPIO
