Keyboard interface system allowing a synchronous keyboard to communicate with a host processor asynchronously by manipulating the keyboard clock's state
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United States of America Patent
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Sep 8, 1992
Grant Date -
N/A
app pub date -
Feb 27, 1989
filing date -
Feb 27, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus and method for handling data transfer between a synchronous keyboard and a host processor is disclosed. An asynchronous receiver/transmitter is employed in conjunction with logic for controlling the keyboard clock and data lines to permit the receipt of data from and the transmittal of data to the keyboard in a pseudo-synchronous manner.
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