Editing Serial port (section)

===Conventional notation===
[[File:Puerto serie Rs232.png|frame|In this diagram, two [[byte]]s are sent, each consisting of a start bit, followed by eight data bits (bits 0-7), and one stop bit, for a 10-bit character frame in 8N1 format. The line on a diagram staying up indicates an excited ("mark" or 1) state of the line, low − unasserted ("space" or 0) state. Both up and low lines drawn for a bit (forming a square) indicate a data bit with value that can be either 0 or 1]]
The data/parity/stop (D/P/S) conventional notation specifies the framing of a serial connection. The most common configuration for the [[Personal computer|personal computing devices]] is '''8-N-1''' (also spelled as 8N1, 8-None-1<ref name="modemhelp"/>), in which there is one start bit, eight ("8") data bits, no ("N") parity bit, and one ("1") stop bit.<ref>{{cite web |title=Definition of N-8-1 |url=https://www.pcmag.com/encyclopedia/term/n-8-1 |website=PCMAG |language=en}}</ref>  In this notation, the parity bit is not included into the count of the data bits. For example, 7/E/1 (7E1) means that an even parity bit is added to the 7 data bits for a total of 8 bits between the start and stop bits.

The abbreviation is usually given together with the line speed in [[bits per second]], as in "9600–8-N-1". The speed (or [[baud rate]]) includes bits for [[Data frame|framing]] (stop bits, parity, etc.), thus the effective data rate is lower than the baud rate. For 8-N-1 encoding, only 80% of the bits are available for data (for every eight bits of data, ten bits are sent over the serial link&nbsp;&mdash; one start bit, the eight data bits, and the one stop bit).<ref name="modemhelp">{{cite web
 | url = http://www.modemhelp.net/faqs/8n1.shtml
 | title = What does 8-N-1 mean?
 | access-date = 2013-12-25
 | publisher = modemhelp.net
}}</ref>