A alternative to the Prop Plug

Instead of buying a PROP plug http://www.parallax.com/Store/Microcont … fault.aspx which is $24.** and out of stock, Could i use the Basic Breakout Board $14.** and in stock http://www.sparkfun.com/commerce/produc … ts_id=8772 With out using any extra hardware to program the Propeller?

– Matthew

This doesn’t quite answer your question, but you can use the FTDI UB232R module (Digikey P/N 768-1022-ND, $17.50) instead.

The UB232R has no breakout pin for DTR, but it has one for RTS. Fortunately, the Propeller Tool can be reconfigured so that it uses RTS as the reset signal (Edit>Preferences>Operation>Propeller Reset Signal: RTS).

The Prop Plug documentation shows a 10nF capacitor, a 33k resistor and an NPN transistor between DTR and the Propeller’s RES pin. For good measure I added those to my design (using a 2N3904), although leaving them out seemed to work fine, too.

I’m pretty sure the SparkFun FTDI breakout board will work, too, but since I haven’t tried it myself, I can’t make promises.

Thanks for the reply, The UB232R and the FTDI Basic Break Out Board hardware looks the same. The FTDI has more hardware (leds) while the the Digikey product has a ferrite bead. So in practice it should work. I Just needed a second opinion. Yet again, Thanks for the reply and help.

Matthew