I think you could use this:
RS232 Shifter SMD
SKU#: PType-Shifter-SMD
Price: $9.95
http://www.sparkfun.com/commerce/product_info.php?products_id=449
To get serial VCC, GND, TX and RX are all you need to wire. I've tried using
just these four pins on a TS-7200 and it worked fine.
-Curtis.
On October 11, 2006 03:49 pm, Keith wrote:
>
> Do I really need a TS-9441 in order to use a TS-7400? I'm hoping to
> use a TS-7400 as a central controller for my home automation system,
> and the TS-9441 nearly doubles the cost of the TS-7400.
>
> It looks like the TS-9441 does the TTL->RS-232 level conversions for
> the console, but I can wire up a MAX3221 to do that for a few dollars.
> Other TS-9441 functions seem to include JTAG connections (which I
> don't think I'll need) and recovery to the default setup if you mess
> up a modification to the flash boot process. But I'm pretty sure I'll
> just set it up to boot from Debian on the SD card, which looks pretty
> simple to do,and not mess with the flash stuff again.
>
> So if I don't need JTAG, and manage to type "ln -sf /linuxrc-sdroot
> /linuxrc; save" once, and can wire up a MAX3221 to provide a console,
> do I need a TS-9441?
>
> I can see the value for someone designing a commercial product, an
> extra $125 would be insignificant, but for someone using just one, it
> seems like a lot.
>
> Thanks,
>
> Keith Hearn
>
>
>
>
>
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