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EZ-USB AT2LP™ USB 2.0 to ATA/ATAPI Bridge
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Cypress Semiconductor Corporation • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600
Document 001-05809 Rev. *A Revised November 30, 2006
Features
• Fixed-function mass storage device—requires no firmware
• Two power modes: Self-powered and USB bus-powered to
enable bus powered CF readers and truly portable USB
hard drives
• Certified compliant for USB 2.0 (TID# 40490119), the USB
Mass Storage Class, and the USB Mass Storage Class
Bulk-Only Transport (BOT) Specification
• Operates at high-speed (480 Mbps) or full-speed (12 Mbps)
USB
• Complies with ATA/ATAPI-6 specification
• Supports 48 bit addressing for large hard drives
• Supports ATA security features
• Supports any ATA command with the ATACB function
• Supports mode page 5 for BIOS boot support
• Supports ATAPI serial number VPD page retrieval for Digital
Rights Management (DRM) compatibility
• Supports PIO modes 0, 3, and 4, multiword DMA mode 2,
and UDMA modes 2, 3, and 4
• Uses one small external serial EEPROM for storage of USB
descriptors and device configuration data
• ATA interface IRQ signal support
• Supports one or two ATA/ATAPI devices
• Supports CompactFlash and one ATA/ATAPI device
• Supports board-level manufacturing test using the USB I/F
• Can place the ATA interface in high impedance (Hi-Z) to
allow sharing of the ATA bus with another controller (i.e., an
IEEE-1394 to ATA bridge chip or MP3 Decoder)
• Low-power 3.3V operation
• Fully compatible with native USB mass storage class drivers
• Cypress mass storage class drivers available for Windows
(98SE, ME, 2000, XP) and Mac OS X operating systems
Features (CY7C68320C/CY7C68321C only)
• Supports HID interface or custom GPIOs to enable features
such as single button backup, power-off, LED-based notifi-
cation, etc.
• 56-pin QFN and 100-pin TQFP lead-free packages
• CY7C68321C is ideal for battery-powered designs
• CY7C68320C is ideal for self- and bus-powered designs
Features (CY7C68300C/CY7C68301C only)
• Pin-compatible with CY7C68300A (using Backward
Compatibility mode)
• 56-pin SSOP and 56-pin QFN lead-free packages
• CY7C68301C is ideal for battery-powered designs
• CY7C68300C is ideal for self- and bus-powered designs
USB 2.0
Tranceiver
CY Smart USB
FS/HS Engine
4 kByte FIFO
PLL
I
2
C Bus Master
ATA
Interface
Logic
Data
Control
24
MHz
XTAL
16 Bit ATA DataUSB
D+
D-
Internal Control Logic
VBUS
ATA Interface
Control Signals
Misc control signals and GPIO
SDA
SCL
ATA 3-state Control
Reset
Block Diagram
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