You may want to change your crystal frequency to some handy multiple of 1200 baud. There's a good reason all those old com port boards used a 1.8432 MHz crystal---it divided nicely to common baud rates.

David Shoemaker wrote:

Well today was an educational and busy day with the atmel website.

It was also close but not quite a living hell with WinDraft.

I have posted a bmp with my current schematic plans based on the AT90S2323 part. The only draw back to this part is that it does not have a built in UART. So one will have to be written in software, anyone with a good AVR background want to tackle that? I am sure I can do it, but it might take me a while.

If I can't come up with a software UART solution I can change over to the 2313 part which has a built in UART. Of course the part is also 20 pin instead of the tiny 8 pin 2323 with lots of left over pins wasted.

I will be basing the software off of one of the atmel application notes: AVR313. That note is for the 8515 part (a 40 pin part) but I think I can adapt it well enough (once again assuming a software UART can be written).

Looking for feedback.

The bmp (and my schematic file and a start of an atmel part library) are at: http://www.thewellworld.net/fluke/wedge

If anyone has more experienced with WinDraft and wants to clean up the schematic I wouldn't mind a bit :) Or if you know how to edit a part in a library after you have closed the dang library file.

David