Michael Robinson 写道:
> On the AximX50 wiki page
> (http://www.handhelds.org/moin/moin.cgi/DellAximX50) there seems to be a
> contradiction in the signal level specifications:
>
> "X50V uses TTL serial interface (3.3 v)"
> "25 - 5V TTL output ?"
>
> Is the serial signal level 3.3V or 5V?
>
I think it should be 3.3V. I can't remember that exactly, I have made
the serial cable for a very long time, but you can use a MAX232 chip to
convert the signal level.
> Secondly, would this level converter
> (http://www.piclist.com/techref/io/serial/RCL1.htm) work using the USB
> client +5V (pin 21)?
sorry, I can't visit this page, so ...... no idea.
Received on Thu Jun 30 2005 - 01:29:15 EDT
This archive was generated by hypermail 2.2.0 : Mon Jul 25 2005 - 18:10:03 EDT