H - Electricity – 04 – L
Patent
H - Electricity
04
L
340/165
H04L 5/24 (2006.01) H04L 7/04 (2006.01)
Patent
CA 1287905
- 15 - METHOD AND APPARATUS FOR DETECTING A RATE OF DATA TRANSMISSION Abstract An asynchronous interface for coupling data between a terminal and a data module is provided. The asynchronous interface directly determines and matches to the rate of serial data being transmitted by the terminal and received by the data module with minimal involvement of a processor associated with the data module. The asynchronous interface determines the rate of the data being transmitted by configuring counting circuitry therein for measuring the period of the start bit in the first received character whenever the speed of data being transmitted by the terminal must be determined. The asynchronous interface then adjusts to the newly determined data rate and receives the remaining bits in the first character and subsequent characters at the new rate. The processor is involved only to request that the asynchronous interface determine the incoming data rate and match to it and, once the data rate has been determined and matched, to process the recovered characters and this new rate. While the asynchronous interface determines and matches to the incoming data rate, the processor is freed for other tasks.
558994
Lese Gregory
Price John Davis
Richardson Ralph Eric
Than Cu Trong
Vancura Mark Douglas
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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