Alphanumeric keypad for data entry

Details Alphanumeric keypad for data entry Alphanumeric keypad for data entry

H - Electricity

03

M

340/175

H03M 11/00 (2006.01) G06F 3/023 (2006.01) G07B 17/00 (2006.01) H03M 11/18 (2006.01)

Patent

CA 2038065

ALPHANUMERIC KEYPAD FOR DATA ENTRY ABSTRACT OF THE INVENTION The data entry system includes a keypad having twelve data entry keys and three shift keys. In the first mode of the data entry system numeric characters are entered by a single keystroke. The other modes are activated by a combination of sequential keystrokes of a respective function key and a data key. The shift keys are color coded with respect to the alpha characters entered by a particular key. The keypad is in bus communication with a keypad driver which in turn is in bus communication with a microprocessor.

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