Start-stop synchronous communicating method capable of correctin

Details Start-stop synchronous communicating method capable of correctin Start-stop synchronous communicating method capable of correctin

1994-12-19

1997-02-11

Beausoliel, Jr., Robert W.

Excavating

371 54, 371 42, 3951821, 3642661, 364269, G06F 1100

Patent

active

056028598

ABSTRACT:
A method of carrying out start-stop synchronous communications is disclosed in which, when improper synchronization takes place owing to the transmission of a recovery frame for improper synchronization having information bits all indicating "0" subsequent to an information frame for transmission, a framing error is produced and the improper synchronization is detected on a receiving side and proper or normal synchronization is established upon receipt of the next frame. Here, a recovery frame for improper synchronization having information bits that all indicate "0" is transmitted immediately after an information frame. When any "0" in a data bit section of the information frame immediately before the frame of all 0 bits is misrecognized as a start bit upon receipt, "0" of the recovery frame is always placed in the position of the stop bit of the misrecognized frame so that a framing error is produced. Since an edge that falls from "1" to "0" does not exist in the recovery frame for improper synchronization, a start bit of the next frame can be accurately supplemented so that an improper synchronizing state is returned to a normal synchronizing state.

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