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APPENDIX C: Asynchronous Communications
Figure C-1. Asynchronous communications bit diagram.
This special bit is called the parity bit. Parity is a simple
method of determining if a data bit has been lost or
corrupted during transmission. There are several
methods for implementing a parity check to guard
against data corruption. Common methods are called
(E)ven Parity or (O)dd Parity. Sometimes parity is not
used to detect errors on the data stream. This is referred
to as (N)o parity.
Because each bit in asynchronous communications is
sent consecutively, it is easy to generalize asynchronous
communications by stating that each character is
wrapped (framed) by pre-defined bits to mark the
beginning and end of the serial transmission of the