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High Speed USB to AT
Reference Design
CY4612
P
RODUCT
O
VERVIEW
The Cypress ISD-300A1 USB to ATA ASIC is the ideal interface for creating a USB based mass storage device.
Our full featured reference design provides single chip support for the following interfaces:
• USB to ATA - ATAPI:
- CD-R/W, CD-R, CD ROM, DVD-RAM,
DVD-ROM, DVD-R/W, MO, ZIP, LS120,
Tape drives, others…
• USB to ATA - IDE:
- Hard drives
• USB to Compact Flash
The ISD-300A1 architecture enables the high performance you expect of a USB 2.0 peripheral. The chip
supports all PIO Modes and UDMA Modes up through UDMA 66. The result is a solution that is limited only by
the speed of the USB bus or the attached drive.
Since it is a fixed function device there’s no need to trouble with firmware.
The development board in our kit provides an easy platform to get a
solution up and running quickly. We also recognize the need to move to
manufacturing quickly. As a result we provide complete hardware
designs for 4 different board variations: the development board, a cable
based bridge, and horizontal and vertical mount modules.
Recognizing the need to minimize driver support, this design is fully
compatible with the Mass Storage Class drivers shipped native in major
operating systems. Windows 98, lacking a native class driver, is supported with our own custom driver provided
in the kit.
F
EATURES
B
ENEFITS
• USB 2.0 specification compliant • Compatible with industry standards
• Backward and forward USB compatibility
• Single chip solution • Small footprint and low cost
• Fixed function device • No firmware hassles, fast time to market
• Minimal support cost
• Multiple production-ready hardware designs • Flexibility in choosing a solutions
• Improved time to market
• USB 2.0 design implements PIO modes 0 - 4 and
UDMA modes 0 - 4
! High Speed sustained transfer rate limited
only by USB 2.0 bandwidth
• Highest performance achievable over USB
• Compatible with Windows and Mac OS class
drivers
• Windows 98 driver included
• Plug N Play with no driver development
• EEPROM configurable • Can support widest variety of drives
• Tri-state-able outputs lines • Supports dual interface (USB/1394) designs
