Tiny and cheap little USB to UART bridge

joep wrote:
> yea, it has a internal 48Mhz oscillator, I wonder if thats just a
> trimmed R/C oscillator, usually they aren't good enough for serial
> timing,

Presumably it is phase locked to the incoming USB clock so it will be
as accurate as the PC's clock.

kevin

[topposting has been fixed]

On 2 Jul 2005 13:24:32 -0700, <picuser@hotmail.co.uk> wrote:

> joep wrote:
>> yea, it has a internal 48Mhz oscillator, I wonder if thats just a
>> trimmed R/C oscillator, usually they aren't good enough for serial
>> timing,
>
> All I can say is that I have used them with the 921600baud rate and it
> works perfectly.

But you have designed them, haven't you?  So you can provide the exact 
answer.

   Vadim

Uwe Bonnes wrote:
> Before using that chip, think about the company politics about not releasing
> a linux open source driver (http://www.kroah.com/log/2004/11/18/).

thanks for that one! In your link Greg says:

"...If people are looking for a good usb to serial chip that is
supported on Linux, Windows, and OS-X, there's the PL2303 device from
Prolific, and the FTDI-SIO chip, and the MCT-U232 chip. All of these
work very well on Linux, and are fully supported by all distros. I think
they even might be cheaper than the CP2101 device..."

since I had much trouble in the past with binary-only distributed
"drivers" (not to mention the GPL violation in this special case), I
would also recommend not to use this CP2101. Or to write to "Silicon
Laboratories" and ask for source of drivers :-)