Cypress CY7C68301C 用户手册

EZ-USB AT2LP™ USB 2.0 to ATA/ATAPI Bridge

•

198 Champion Court

•

San Jose

,

CA 95134-1709

•

408-943-2600

Document 001-05809 Rev. *A

 Revised November 30, 2006

• 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

• 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

• 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 Data

USB

D+

D-

Internal Control Logic

VBUS

ATA Interface 

Control Signals

Misc control signals and GPIO

SDA

SCL

ATA 3-state Control

Re

s

e

t