Quick question regarding P8X32A-D40 and PropStick

ryfitzger227

Hello everyone!

I just had a quick question. I'm in the process of designing a PCB and I just wanted to double check something.

I'm going to be using the PropStick (for simplicity reasons) for my current project. I need it done in about 3 more weeks and I've got to get it working. Therefore, this is the easiest way. I'm using eagle and I'm trying to design the .lbr file. I just wanted to make sure that the PropStick and the P8X32A-D40 is the same layout. If this is the case, I can just copy the P8X32A-D40 board layout file and just create a schematic part off of that.

Thanks!
- Ryan

Invent-O-Doc

Besides the difference in programming functionality, the chip pinouts are identical. I take it your intention is to test things out and use the propstick to develop, then plug in programmed propeller chips. Keep in mind that the chip will require a crystal on the board (which you may need to leave out while using the propstick) if you care about timing for serial and the like.

Publison

For the most part the I/O's are compatible, but there are enough differences to create another library item.


Pin 10 on Propstick is tied to VSS, permanently enabling the Brown out circuit.
Pin 12 is the input for the on-board regulator. Should be supplied with 5-9 volt DC.
Pin 28-29 connect to the on-board EEPROM
Pins 30-31 connect to the on board FTDI USB Converter.

Publison

Invent-O-Doc wrote: »

. Keep in mind that the chip will require a crystal on the board (which you may need to leave out while using the propstick) if you care about timing for serial and the like.

Tom,

The Propstick has a 5Mhz xtal on board.:

http://www.parallax.com/Portals/0/Downloads/docs/prod/prop/32210-PropStickUSB-1.2.pdf