CY7C68300A

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 and receives status and data from the CY7C68300A using standard USB protocol.

The ATA/ATAPI port of the CY7C68300A is connected to a mass storage device. A 4-Kbyte buffer maximizes ATA/ATAPI data transfer rates by minimizing losses due to device seek times. The ATA interface supports ATA PIO modes 0, 3, and 4, and Ultra DMA modes 2 and 4.

The device initialization process is configurable, enabling the CY7C68300A to initialize ATA/ATAPI devices without software intervention.

• 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 T13’s 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
• “ATA-Enable” 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.