The other 50G port?


Hello all.

I just got my eagerly anticipated new 50G!!! Yippee! Yes, I see the MiniUSB port on the right. But, what's that other port just to the left?

Edited: 8 Mar 2012, 6:23 p.m.


Serial. It is *NOT* EIA-232 (formerly RS-232), but you can buy an adapter cable to interface it to EIA-232.


It is *NOT* EIA-232 (formerly RS-232),
I had to look that up, as I've heard it called "EIA 232" but never heard that "RS-232" is incorrect. Wikipedia has it under RS-232, with no redirecting, but apparently now the term "EIA 232" is out of date too:
In telecommunications, RS-232 is the traditional name for a series of standards for serial binary single-ended data and control signals connecting between a DTE (Data Terminal Equipment) and a DCE (Data Circuit-terminating Equipment). It is commonly used in computer serial ports. The standard defines the electrical characteristics and timing of signals, the meaning of signals, and the physical size and pin out of connectors. The current version of the standard is TIA-232-F Interface Between Data Terminal Equipment and Data Circuit-Terminating Equipment Employing Serial Binary Data Interchange, issued in 1997.


The standard has been renamed several times during its history as the sponsoring organization changed its name, and has been variously known as EIA RS-232, EIA 232, and most recently as TIA 232. The standard continued to be revised and updated by the Electronic Industries Alliance and since 1988 by the Telecommunications Industry Association (TIA).[3] Revision C was issued in a document dated August 1969. Revision D was issued in 1986. The current revision is TIA-232-F Interface Between Data Terminal Equipment and Data Circuit-Terminating Equipment Employing Serial Binary Data Interchange, issued in 1997. Changes since Revision C have been in timing and details intended to improve harmonization with the CCITT standard V.24, but equipment built to the current standard will interoperate with older versions.

I'll still go with "RS-232." It sure is more friendly for cobling projects together on the workbench than USB, and there are plenty of applications where RS-232 speeds are plenty adequate. It's great the it's so easy to get RS-232 with the 50g.


Well, the 50g port doesn't do TIA-232 either. It's the adapter cable that does it. The 50g has async serial at 3.3V CMOS levels, or something close to that.

By the way, don't tell Eric Rechlin that it's "easy to get RS-232 with the 50g". He might disagree vehemently about it having been easy.


It's easy, thanks to him. :)


Well, thank you.

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