Serial Communications Parity Definition (52196)
The information in this article applies to:
• Microsoft MS-DOS operating system 3.1
• Microsoft MS-DOS operating system 3.2
• Microsoft MS-DOS operating system 3.21
• Microsoft MS-DOS operating system 3.3
• Microsoft MS-DOS operating system 3.3a
• Microsoft MS-DOS operating system 4.0
• Microsoft MS-DOS operating system 4.01
• Microsoft MS-DOS operating system 5.0
• Microsoft MS-DOS operating system 5.0a
• Microsoft MS-DOS operating system 6.0
• Microsoft MS-DOS operating system 6.2
• Microsoft MS-DOS operating system 6.21
• Microsoft MS-DOS operating system 6.22
This article was previously published under Q52196
SUMMARY
In serial communications, the parity bit is used in a simple error
detection algorithm. As a stream of data bits is formed, an extra bit,
called the parity bit, is added. This bit is set on (1) or off (0),
depending on the serial communications parameters set in the UART chip. The
following table lists the available parity parameters and their meanings:
Parameter Meaning
--------- -------
ODD Parity bit set so that there is an odd number of 1 bits
EVEN Parity bit set so that there is an even number of 1 bits
NONE Parity bit is ignored, value is indeterminate
MARK Parity bit is ALWAYS set to 1
SPACE Parity bit is ALWAYS set to 0
Modification Type: |
Major |
Last Reviewed: |
5/12/2003 |
Keywords: |
KB52196 |
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