AVR-P40 question (Help!)

Development Boards MicroMod
1

I recently got a AVR-P40 board, and noticed that this design includes a jumper for 3.3 or 5v power regulation.

I needed to prototype some connections to 3.3v parts and I’m thinking, “cool, I’ll just jumper the board for 3.3v, get a low power AVR, and I’m set”.

So I got a Atmega32L, put it in the socket, but it doesnt seem to work at 3.3 volts. Looking at the board it looks like there is a reset IC (MC33064P) that would reset the avr at 4.59 volts. Doh!

So my question is: is there a trick to getting the board to work at 3.3 volts? With that reset IC in place, I cant figure out how to make this work… Am I missing something here?

2

Think I found a solution to my problem:

The Reset IC was connected to a trace that runs to the reset pin via a 0 ohm SMD resistor, marked as “R6”. Removing this resistor effectively disconnects the output of the Reset IC, but leaves everything else still attached to the reset pin that is supposed to be (i.e. ISP header, 10k pullup). So I removed the resistor, turned on the brownout detection fuse on the AVR and I seem to be working at 3.3v

Since I got that working, the Nokia Knockoff LCD is working now too… 8)