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Re: Serial Port

2006-09-23 by x2dydx

> Just to be clear re: serial port of 50g.  It is not a true RS232-
> standard device.  It's a 3.3V TTL signal (noninverted).  There 
> should be a third-party cable soon if you don't want to make one 
> yourself.
> 
> --Scott
>

Hi Scott, I don't mean to beat this subject to death but I assumed that 
the serial output from the calculator would be RS232.  I really 
appreciate you giving the heads up that it is not standard RS232 
but "3.3V TTL signal (noninverted)," however I don't know the 
ramifications of that difference.  So I guess the question is, are the 
two signals compatable and the interface as simple as building a cable, 
or is there some signal incompatabilities that require additional 
electronic signal processing (for example an inverter) in order to 
interface the calculator to a standard RS232 connection?

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