EDE1144
Feature
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Automatic key repeat after delay Contact debouncing Keybeep provides tactile feedback to operator Electrically quiet (reduced EMI) keypad scanning Serial / Parallel outputs available Data Valid output signal for interrupt activation 2400/ 9600 serial Baud rates Available in 18 pin DIP or SOIC packages Interfaces to any microcontroller or microprocessor Cost effective for OEM applications
The EDE1144 Keypad Encoder IC is designed to interface a matrix-type 4 row x 4 column (16 key or less) keypad to a microcontroller or other host processor. A one-wire serial or four-wire parallel interface returns the keypress data and can be used in conjunction with a 'data valid' signal for polled or interrupt-driven applications. The EDE1144 provides enhanced keypad features such as contact debouncing and key auto-repeat in an easy-to-use package that will lower software overhead in the host microcontroller and reduce the I/O pin requirements from eight to one,...
