RS-232C serial port

[JJJ]

What is a RS-232C serial port and how is it different than whaty i have on my computer???

[tjaymadison]

It's just a more 'formal' or precise term, referring to the ANSI standard.
They are the same.

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"I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question."
-- Charles Babbage, mathematician, computer pioneer, analytical engine designer (1791-1871)
-- (Question: 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?')

"Just because I don't care, doesn't mean I don't understand."
-- Homer Simpson

[JJJ]

thanx i jusit gota figure something out thats wrong with it ....hehe

[Paleo Pete]

OK< so what's wrong with it?

RS 232 is basicallly a standard serial port with a different connector. Computers usually have two serial port connectors, one has a DB9 connector, the serial mouse plugs in there, and an RS 232 port, it's not used often. It has a DB25 plug. (correct me if I'm wrong on the plugs guys, I didn't look it up.) http://www.PCGuide.com/ubb/biggrin.gif



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[tjaymadison]

I goofed. http://www.PCGuide.com/ubb/redface.gif The standard is EIA, not ANSI. From Webopedia:

Short for recommended standard-232C, a standard interface approved by the Electronic Industries Association (EIA) for connecting serial devices. In 1987, the EIA released a new version of the standard and changed the name to EIA-232-D. And in 1991, the EIA teamed up with Telecommunications Industry association (TIA) and issued a new version of the standard called EIA/TIA-232-E. Many people, however, still refer to the standard as RS-232C, or just RS-232.

Almost all modems conform to the EIA-232 standard and most personal computers have an EIA-232 port for connecting a modem or other device. In addition to modems, many display screens, mice, and serial printers are designed to connect to a EIA-232 port. In EIA-232 parlance, the device that connects to the interface is called a Data Communications Equipment (DCE) and the device to which it connects (e.g., the computer) is called a Data Terminal Equipment (DTE).

The EIA-232 standard supports two types of connectors -- a 25-pin D-type connector (DB-25) and a 9-pin D-type connector (DB-9). The type of serial communications used by PCs requires only 9 pins so either type of connector will work equally well.

Although EIA-232 is still the most common standard for serial communication, the EIA has recently defined successors to EIA-232 called RS-422 and RS-423. The new standards are backward compatible so that RS-232 devices can connect to an RS-422 port.


------------------
"I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question."
-- Charles Babbage, mathematician, computer pioneer, analytical engine designer (1791-1871)
-- (Question: 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?')

"Just because I don't care, doesn't mean I don't understand."
-- Homer Simpson