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Временные диаграммы RS232   Найти похожие ветки 

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European   (2004-05-25 00:21) [0]

Господа, помогите в поисках временных диаграмм работы интерфейса RS232. Причём желательно что-нибудь внушающее доверие:)

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European   (2004-05-25 00:38) [1]

Какая организация вообще занималась разработкой этого интерфейса?

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Rouse_ ©   (2004-05-25 00:43) [2]

What is EIA232?
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In the early 1960s, a standards committee, today known as the Electronic Industries Association, developed a common interface standard for data communications equipment. At that time, data communications was thought to mean digital data exchange between a centrally located mainframe computer and a remote computer terminal, or possibly between two terminals without a computer involved. These devices were linked by telephone voice lines, and consequently required a modem at each end for signal translation. While simple in concept, the many opportunities for data error that occur when transmitting data through an analog channel require a relatively complex design. It was thought that a standard was needed first to ensure reliable communication, and second to enable the interconnection of equipment produced by different manufacturers, thereby fostering the benefits of mass production and competition. From these ideas, the RS232 standard was born. It specified signal voltages, signal timing, signal function, a protocol for information exchange, and mechanical connectors.

Over the 40+ years since this standard was developed, the Electronic Industries Association published three modifications, the most recent being the EIA232E standard introduced in 1991. Besides changing the name from RS232 to EIA232, some signal lines were renamed and various new ones were defined, including a shield conductor.

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European   (2004-05-25 00:47) [3]

Откуда цитата-то?

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Rouse_ ©   (2004-05-25 00:48) [4]

http://www.camiresearch.com/Data_Com_Basics/RS232_standard.html

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jack128 ©   (2004-05-25 00:51) [5]

а что, это у тя реферат такой что ли? ;-)

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European   (2004-05-25 00:53) [6]

Нет. Написал программу, работающую с временными диаграммами. Пора тестировать.

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