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CY7C68300A_05 Datasheet, PDF (1/21 Pages) Cypress Semiconductor – EZ-USB AT2™ USB 2.0 To ATA/ATAPI Bridge | |||
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This part is not recommended for new designs
Use CY7C68300B EZ-USB AT2LP⢠USB2.0 to ATA/ATAPI
Bridge for new designs
CY7C68300A
1.0 Features
⢠Complies with USB-IF specifications for USB 2.0, the
USB Mass Storage Class, and the USB Mass Storage
Class Bulk-Only Transport Specification
⢠Operates at high (480-Mbps) or full (12-Mbps) speed
⢠Complies with T13âs ATA/ATAPI-6 Draft Specification
⢠Supports 48-bit addressing for large hard drives
⢠Supports PIO modes 0, 3, 4, and UDMA modes 2, 4
⢠Uses one external serial EEPROM containing the USB
device serial number, vendor and product identification
data, and device configuration data
⢠ATA interface IRQ signal support
⢠Support for a single ATA/ATAPI device configured
either as master or slave
EZ-USB AT2â¢
USB 2.0 To ATA/ATAPI Bridge
⢠âATA-Enableâ input signal, which three-states all
signals on the ATA interface in order to allow sharing
of the bus with another controller (e.g., an IEEE-1394 to
ATA bridge chip)
⢠Support for board-level manufacturing test via USB
interface
⢠3.3V operation for self-powered devices
⢠56-pin SSOP and 56-pin QFN packages
2.0 Introduction
The CY7C68300A implements a fixed-function bridge
between one USB port and one ATA- or ATAPI-based mass
storage device port. This bridge adheres to the Mass Storage
Class Bulk-Only Transport Specification and is intended for
self-powered devices.
The USB port of the CY7C68300A is connected to a host
computer directly or via the downstream port of a USB hub.
Host software issues commands and data to the CY7C68300A
SCL
SDA
I2C-Compatible
Bus Controller
24
MHz
XTAL
VBUS
D+
D-
PLL
USB 2.0 XCVR
AT2 Internal Logic
ATA_EN (ATA Interf ace 3-state)
ATA Interf ace
ControlSignals
Control
ATA
Interf ace
16 Bit ATA Data
Logic
CY SmartUSB
FS/HSEngine
4kBy teFIFO
Data
Cypress Semiconductor Corporation
Document #: 38-08031 Rev. *E
Figure 1-1. Block Diagram
⢠3901 North First Street
⢠San Jose, CA 95134 ⢠408-943-2600
Revised September 15, 2005
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