What do you think of the UC3-A3 Xplained board?

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Greets!

It's time to learn something new, and that will be the AVR32. My goals will be to learn some AVR32 assembly and migrate my XMega video projects to AVR32. I am interested in SDRAM interfacing and see this board has an 8MB SDRAM included so that is good.

What worries me is the lack of IO on the board. It has 4 connectors that seem to have 8 IOs each, but I am not yet familiar with AVR32 hardware, so can all of those IO be used as GPIO if not needing the special functions? If not, then the board really has only 8 GPIO, which is going to be very restrictive in my work.

One more question to those who have used the Xplain UC3 board...

How much bandwidth can I get out of the SDRAM using the EBI?
Currently, I am getting 32MHz (read or write) on an SRAM connected to an XMega with my own asm driver.

Thanks,
Brad

I Like to Build Stuff : http://www.AtomicZombie.com

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I can't comment on that particular board as I've never used it but I'd be willing to bet you won't be disappointed with the EBI interface. It is quite flexible and easy to use. I did a project using the EBI to provide a memory mapped interface to an fpga with good results. I was able to comfortably achieve 70nS read and writes. This was to a low speed grade Altera Cyclone III chip. All the I/O pins on UC3s are multiplexed and as such are available as gpio. All of the I/O pins have 3 or 4 potential functions and gpio is always one of the choices.
Hope that helps.

Letting the smoke out since 1978

 

 

 

 

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Thanks for the info. My target will be 12ns, so I guess I will have to try it and see. I have managed 10ns with SRAM and an FPGA, but that was right at the edge.

Brad

I Like to Build Stuff : http://www.AtomicZombie.com