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Subject: RE: serial interface uses
From: Chris Holt (
Date: 2003-09-26

On Fri, 26 Sep 2003 14:12:36 -0500, Chris Muth wrote:
> On 9/26/03 at 12:05 PM Chris Holt wrote:
>> Roger that. I have a cable I can hook up to my Handspring Visor with
>> some level conversion circuitry built into the plug. This cable
>> allows me to hook the PDA directly to a standard external modem and
>> connect to the internet.
>> AFAIK, the serial port on most PDAs is pretty generic, the cradle
>> determines whether you hook to USB or serial ports on the computer.
>> Chris
> Not quite. The PDA must itself have a USB port in order to sync via
> USB. To sync via standard RS-232 (serial), again it must itself have a
> serial port.
> The cradle is usually just a fancy plug for the bottom of the PDA. In
> some cases the cradle will have level shifting hardware for the RS-232
> interface.
> While there might be exceptions, this is generally the rule.
> -Chris Muth

Remember the "S" in USB stands for Serial. :)

This page might be enlightening.


Page was last modified "Jan 10 2012" The Rockbox Crew