As an alternative to wiring up a voltage converter chip, you can instead go directly to USB with a USB-to-serial chip such as a PL2303.
The "traditional" arrangement is: USB-to-serial dongle -> DB9 -> serial cable -> DB9 -> 12V-to-3.3V-voltage-translator But inside the USB-to-serial dongle there is: USB-to-serial-chip -> 3.3V-to-12V-voltage-translator So the chain: 3.3V-to-12V-voltage-translator -> DB9 -> serial cable -> DB9 -> 12V-to-3.3V-voltage-translator is essentially a complicated hardware "no-op". There is little difference in the complexity of wiring up the USB-to-serial chip versus wiring up the voltage translator chip. John Watlington wrote: > No. You can use a standard USB/RS-232 serial converter, but > you will also need a voltage translator (such as a Maxim MAX3233 --- > you used to be able to get free samples from Maxim) and a male and > female connector to connect to the board. I'll dig up the connector > spec (Digikey carries them) and pinout and post them on the Wiki > soon. Remind me if you are in a rush. > > The debug adapters cost us around $100 to make, due to the small > quantity built. We treasure them dearly, as we sometime need 50 or > more in a testbed! > > wad > > On Dec 20, 2007, at 12:16 PM, Gerard J. Cerchio wrote: > > >> Hi All, >> >> Do the XO's ship with the serial/USB debug adapter? >> >> If not, how do I get one? >> >> -Gerard >> >> >> _______________________________________________ >> Devel mailing list >> Devel@lists.laptop.org >> http://lists.laptop.org/listinfo/devel >> > > _______________________________________________ > Devel mailing list > Devel@lists.laptop.org > http://lists.laptop.org/listinfo/devel > _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
