product brief
Overview
The JM20339 is the single chip solution to bridge between USB host and SATA device.
The highly integrated Hi-Speed USB and SATA Phys technology provides a cost-effective solution to apply USB to SATA device enclosure.
The USB adheres the Mass Storage Class Bulk-Only Transport Specification.
The embedded command parser supports both ATA and ATAPI command set with LBA48 addressing capability.
Features
• Compliance with Gen1i/Gen1m of Serial ATA II Electrical Specification 2.5
• Support SATA II Asynchronous Signal Recovery (Hot Plug) feature
• 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 PACKET command set
• Support ATA/ATAPI LBA48 addressing mode
• Support 12MHz external crystal or 12MHz internal embedded oscillator.
• Support external NVRAM for Vender Specific VID/PID of USB Device Controller
- Support PMC/SST/ST SPI interface EEPROM for External NVRAM
• Embedded 5V to 3.3V and 1.8V voltage regulator
• 64 LQFP package and support 5V tolerance GPIO pins
• Support the external firmware flexibility
- Support PMC/SST/ST SPI interface serial flash for external firmware
- Maximum size is 16Kbyte
• Support on line USB firmware update ( e.g. ISP)
• Embedded six hardware PWM
-Four PWM output are located on GPIO[16, 18, 22, 23] pins
-One PWM output is located on HDDA.
-One PWM/Fading output are programmable to HDDA or other GPIO pins
• Embedded 2K bytes data FIFO for USB data transfer
• Embedded high performance 8-bit MCU
• Support 4K sectors HDD command
• Support auto-get SPI serial flash hardware engine.
