DatasheetsPDF.com

XAPP512

Xilinx
Part Number XAPP512
Manufacturer Xilinx
Description Implementing Keypad Scanners
Published Jul 5, 2006
Detailed Description www.DataSheet4U.com Application Note: CoolRunner-II CPLD R Implementing Keypad Scanners with CoolRunner-II XAPP512 (v...
Datasheet PDF File XAPP512 PDF File

XAPP512
XAPP512

Overview
www.
DataSheet4U.
com Application Note: CoolRunner-II CPLD R Implementing Keypad Scanners with CoolRunner-II XAPP512 (v1.
0) April 4, 2005 Summary This application note provides a functional description of Verilog source code for a keypad scanner.
The code is used to target the lowest density, 32-macrocell CoolRunnerTM-II XC2C32A CPLD device in a CP56 package (6 mm x 6 mm).
The keypad accommodated in this design has 8 rows and 8 columns.
The design can easily be scaled to target keypads with more or less rows/columns.
For instance, a keypad with 7 rows and 7 columns would allow the design to fit in the smallest QFG32 package (5 mm x 5 mm).
To obtain the Verilog source code described in this document, see “Verilog Code,” page 4, for instructions.
Introduction As handheld devices such as cell phones pack more and more features into them, they require more effective ways of entering data.
Most cell phones, for example, use the standard DTMF style keypad and a multi-tap process to ente...


Similar Datasheet


Since 2006. D4U Semicon,
Electronic Components Datasheet Search Site. (Privacy Policy & Contact)