The one that uses the max 3232 is an RS-232 (serial out of your
computer) --> USB converter and the other one is a USB --> logic
level.

Wiki RS-232 to see what the line out electricals are.

DougM

On Thu, Jul 28, 2011 at 8:47 AM, Nathan House <nathanpiclist@gmail.com> wro=
te:
> I need a USB to serial adapter and am thinking about making one with
> the MCP2200, but looking at the evaluation board schematic
> (http://www.microchip.com/stellent/idcplg?IdcService=3DSS_GET_PAGE&nodeId=
=3D1406&dDocName=3Den547372),
> I'm confused why there is a MAX3232 chip on the board?
>
> Looking at another company's board that uses the MCP2200,
> http://www.mikroe.com/eng/downloads/get/1601/usb_uart2_manual_v100.pdf,
> there's no MAX232 chip. So why does Microchip's eval board have one?
>
> Thanks!
>
> -Nate
>
> P. S. I've been trying to decide between the MCP2200 and FT232RL; if
> anyone has used both and would like to chime in, I'd appreciate it!
>
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