IDE Removable Media Devices

CY7C68300C/CY7C68301C

CY7C68320C/CY7C68321C

IDE Removable Media Devices

The AT2LP does not fully support IDE removable media devices. Changes in media state are not reported to the operating system so users are unable to eject/reinsert media properly. This may result in lost or corrupted data. Note that standard ATAPI optical drives and ATA CompactFlash-type devices are not part of this group.

Devices With Small Buffers

The size of the drive’s buffer can greatly affect the overall data transfer performance. Care must be taken to ensure that

drives have large enough buffers to handle the flow of data to and from it. The exact buffer size needed depends on a number of variables, but a good rule of thumb is:

(aprox min buffer) = (data rate) * (seek time + rotation time + other)

where ’other’ may include things like the time required to switch heads, power up a laser, etc. Drives with buffers that are too small to handle the extra data may perform consid- erably slower than expected.

Disclaimers, Trademarks, and Copyrights

Purchase of I2C™ components from Cypress or one of its sublicensed Associated Companies conveys a license under the Philips I2C Patent Rights to use these components in an I2C system provided that the system conforms to the I2C Standard Specification as defined by Philips. Microsoft and Windows are registered trademarks of Microsoft Corporation. Apple and Mac OS are registered trademarks of Apple Computer, Inc. EZ-USB AT2LP, EZ-USB AT2, EZ-USB FX2 and EZ-USB TX2 are trademarks, and EZ-USB is a registered trademark of Cypress Semiconductor Corporation. All product and company names mentioned in this document are the trademarks of their respective holders.

Document 001-05809 Rev. *A

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© Cypress Semiconductor Corporation, 2006. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.

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Cypress specifications Disclaimers, Trademarks, and Copyrights, CY7C68300C/CY7C68301C CY7C68320C/CY7C68321C