CY7C68320C-100AXC

The EZ-USB AT2LP(CY7C68300C/CY7C68301C and CY7C68320C/CY7C68321C) implements a fixed-function bridge between one USB port and one or two ATA- or ATAPI-based mass storage device ports. This bridge adheres to the Mass Storage Class Bulk-Only Transport Specification (BOT) and is intended for bus and self powered devices. The AT2LP is the latest addition to the Cypress USB mass storage portfolio, and is an ideal cost- and power-reduction path for designs that previously used Cypress’s ISD-300A1, ISD-300LP, or EZ-USB AT2. Specifically, the CY7C68300C/CY7C68301C includes a mode that makes it pin-for-pin compatible with the EZ-USB AT2 (CY7C68300A). The USB port of CY7C68300C/301C and CY7C68320C/321C (AT2LP) is connected to a host computer directly or with the downstream port of a USB hub. Software on the USB host system issues commands and sends data to the AT2LP and receives status and data from the AT2LP using standard USB protocol. The ATA/ATAPI port of the AT2LP is connected to one or two mass storage devices. 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 [1], and 4, multiword DMA mode 2, and Ultra DMA modes 2, 3, and 4. The device initialization process is configurable, enabling the AT2LP to initialize ATA/ATAPI devices without software intervention.

• Fixed Function Mass Storage Device - Requires no Firmware
• Two Power Modes: Self Powered and USB Bus Powered to enable Bus Powered CF (CompactFlash) 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 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 Interfac