Re: [Gumstix-users] RS232 conections

[Dave H. <dhy...@gm...>]

Hi Gert,

On Apr 12, 2005 2:48 AM, Gert S=F8rensen <gs...@gm...> wrote:
> I am trying to communicate withthe gumstix using a RS232 com port. I
> have made a device as per the gumstix schematic
> http://www.gumstix.org/tikiwiki/tiki-index.php?page=3DUART_Schematics
>=20
> I want to connect it to the Gumstix and have connected the signals
> Y0_RXD to FFRXD (hirose pin 54)  and Y0_TXD to FFTXD (hirose pin 26)
> Is this correct? I seem to get a 5.0 V signal on FFRXD

Are you seeing 5v on FFRxd with or without your device connected?
FFRXD should be an input on the gumstix side of things and an output
from your voltage converter.

What's the actual part number of the device that you're using?

My WaySmall board seems to have this part on it:
http://focus.ti.com/docs/prod/folders/print/max3232.html

What voltage are you providing as Vcc?

The WaySmall uses a 3.3v voltage regulator, and Vcc in the schematic
is supposed to be 3.3v

--=20
Dave Hylands
Vancouver, BC, Canada
http://www.DaveHylands.com/