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AN2034
January 16, 2009 Document No. 001-40409 Rev. *A 5
Document History
Document Title: User Interface – Keypad Scan, PSoC
®
Style
Document Number: 001-40409
Revision ECN Orig. of
Change
Submission
Date
Description of Change
** 1532004 OGNE 10/02/07 New publication of existing application note.
*A 2640952 JVY 01/20/09 Updated content.
Added part numbers CY8C20x34, CY8C21x23, CY8C21x34,
CY8C23x33, CY8C24x23A, CY8C24x94, CY8C27x43, and CY8C29x66.
In March of 2007, Cypress recataloged all of its Application Notes using a new documentation number and revision code. This new documentation
number and revision code (001-xxxxx, beginning with rev. **), located in the footer of the document, will be used in all subsequent revisions.
PSoC is a registered trademark of Cypress Semiconductor Corp. "Programmable System-on-Chip," PSoC Designer, and PSoC Express are trademarks
of Cypress Semiconductor Corp. All other trademarks or registered trademarks referenced herein are the property of their respective owners.
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© Cypress Semiconductor Corporation, 2002-2009. 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
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