| 摘要 |
An electronically controlled mechanical keyboard simulator includes a key selector switch and a signal generating circuit for outputting a preliminary symbol selection signal and a final symbol selection signal, and a keyboard interface circuit. The keyboard interface circuit has a row selector and a column selector, and a scanner for scanning the row and column selectors. The row selector has an enable input terminal which receives the preliminary symbol selection signal as an output disabling signal and the final symbol selection signal as an enabling signal for row identification of a selected information key and output of a row identification signal to the column selector. The column selector is operative upon receipt of the row determining signal for selecting an information column identifying output terminal and outputting the selected row information thereon to a microprocessor for data retrieval and communication of the selected information to the user by a display or audio device.
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