XAPP512 Datasheet - Xilinx

XAPP512 Implementing Keypad Scanners

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 o.

XAPP512 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 enter alphanumeric data; however, for larger amounts of data multi-tapping becomes cumbersome. More and more high-end phones are therefore employ

XAPP512_Xilinx.pdf