USB to IDE enclosure chipset benchmarks

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

Features

    *Fixed-function mass storage device-requires no firmware code
    *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# 40460273), the USB Mass Storage Class, and the USB Mass Storage Class Bulk-Only Transport (BOT) Specification
    *Operates at high (480-Mbps) or full (12-Mbps) speed USB
    *Complies with ATA/ATAPI-6 specification
    *Supports 48-bit addressing for large hard drives
    *Supports ATA security features
    *Supports all ATA commands via 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, 4, multiword DMA mode 2, and UDMA modes 2, 3, 4
    *Uses one external serial EEPROM for storage of USB descriptors and device configuration data
    *ATA interface IRQ signal support
    *Support for one or two ATA/ATAPI devices
    *Support for CompactFlash and one ATA/ATAPI device
    *Can place the ATA interface in high-impedance (Hi-Z) to allow sharing of the ATA bus with another controller (e.g., an IEEE-1394 to ATA bridge chip or MP3 Decoder)
    *Support for board-level manufacturing test via USB interface
    *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

Functional Description

The EZ-USB AT2L(TM) CY7C68300B/CY7C68301B and CY7C68320/CY7C68321) 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 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 the ISD-300A1, ISD- 300LP, or EZ-USB AT2.

PL-2507
Hi-Speed USB to IDE Bridge Controller
The PL-2507 is a single chip USB2.0-IDE bridge controller, which is designed to perform a seamless protocol transfer between the USB and ATA interfaces.
It will work with full function at full speed or high speed USB transfer mode. The operating speed mode is determined by the capability of the host/hub to which it is connected. The PIO mode 0 to mode 5, Multi Word DMA mode 0 to mode 2, and Ultra DMA mode 0 to mode 4 are implemented to support difference IDE devices. The chip will communicate with the connected device to select the proper mode to obtain the best performance.
The chip is implemented according to the USB Bulk-Only Mass Storage Class specification ver 1.0. Since the default driver is supported by most the OS, no additional driver is needed.

    * Universal Serial Bus Specification 2.0 Compliant
    * USB Mass Storage Class Bulk-Only Transport Specification Compliant
    * AT Attachment with Packet Interface Extension(ATA/ATAPI) Compliant
    * ATA interface support PIO mode 0 ~ 4, Multiword DMA mode 0 ~ 2, and UltraDMA mode 0 ~ 4 to work with ATA/ATAPI devices
    * Integrate full speed and high speed transceiver
    * 5 V tolerant inputs, 3.3 V output drive
    * Sufficient 4K bytes data buffer for both the downstream and upstream data transfer in optimized performance
    * Support external serial EEPROM to customize vender/product related information
    * Support multiple LUN (optional)
    * Additional General Purpose IO pins for further customization
    * On-chip 3.3v to 2.5v regulator to supply the power of 0.25 process core circuit
    * Inexpensive LQ100 and LQ64 packaging available

* Complies with Universal Serial Bus specification rev. 2.0. 
* Complies with ATA/ATAPI-6 specification rev 1.0. 
* Complies with USB Storage Class specification ver.1.0. (Bulk only protocol) 
* Operating system supported: Win XP/2000/ME/98/98SE; Mac OS 9.X/X. 
* Integrated USB 2.0 Transceiver Macrocell Interface (UTMI) transceiver and Serial Interface Engine (SIE). 
* Supports 4 endpoints: Control (0)/Bulk Read (1)/Bulk Write (2)/Interrupt (3). 
* 64/512 bytes Data Payload for full/high speed Bulk Endpoint. 
* Supports 16-bit Multiword DMA mode and Ultra DMA mode interface (Ultra 33/66). 
* Embedded RISC CPU. 
* Supports Power Down mode and USB suspend indicator. 
* Supports USB 2.0 TEST mode features. 
* Supports 2 GPIO (GPIO5 & 6) for programmable AP (only for 64 pin package). 
* Supports device power control for power on/off when running suspend mode (only for 64 pin package). 
* Supports 32 bit and 48 bit LBA hard disk. 
* Provides LED indicator for Full Speed and High Speed (only for 64 pin package). 
* 12 MHz external clock to provide better EMI. 
* 3.3V power input; 5V tolerance pad for IDE interface. 
* Supports Wakeup ability. 
* Available in 48-pin LQFP and 64-pin TQFP package.