发明名称 |
Autobauding with adjustment to a programmable baud rate |
摘要 |
An asynchronous receiver/transmitter provides autobauding with adjustment to a programmable baud rate. A baud divisor is calculated based on a detected size of a start bit. The asynchronous receiver/transmitter provides a plurality of baud divisor replacement registers, each register storing a baud divisor threshold and a baud divisor replacement. The baud divisor is compared to the plurality of programmed baud divisor thresholds. Based on the performed hardware comparison, the baud divisor is automatically replaced by a baud divisor replacement for a particular baud divisor range defined by a baud divisor threshold and including the baud divisor. The baud rate corresponding to this baud divisor replacement represents the appropriate baud rate. Autobauding with adjustment to a programmed baud rate corrects for measurement inaccuracies with respect to the start bit size. Autobauding with adjustment to a programmed baud rate also permits an asynchronous receiver/transmitter to reliably support high speed baud rates. Further, the programmable nature of the baud divisor thresholds and baud divisor replacements permits an asynchronous receiver/transmitter to support autubauding at multiple asynchronous receiver/transmitter frequencies.
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申请公布号 |
US6366610(B1) |
申请公布日期 |
2002.04.02 |
申请号 |
US19980080336 |
申请日期 |
1998.05.15 |
申请人 |
ADVANCED MICRO DEVICES, INC. |
发明人 |
LOYER BRUCE A.;TYPALDOS MELANIE D. |
分类号 |
G06F13/38;H04L25/02;(IPC1-7):H04B17/00 |
主分类号 |
G06F13/38 |
代理机构 |
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