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Author Topic: DREAMING: Breadboard, DDR socket and an mBed  (Read 3112 times)

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Offline JimS

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Re: DREAMING: Breadboard, DDR socket and an mBed
« on: February 16, 2012, 09:10:59 PM »
I was thinking about something like the XESS "XULA" board. It's got 8MB of SDRAM and a Spartan 3 FPGA. But it's not 5v tolerant.
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Offline JimS

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Re: DREAMING: Breadboard, DDR socket and an mBed
« Reply #1 on: February 17, 2012, 01:42:43 PM »
Quote from: billt;680742
Is it 5V tolerant? I see a 5V labelled connection on the board, but I don't see anything saying the FPGA is 5V or 5V-tolerant. Not many are anymore, and my Spartan3 board has QuickSwitches on it to make it safe in a 5V PCI slot, as the 3.3V chip is not tolerant alone.


The 5v connection on the board is just one of the power options. You can run it off the USB power or some combination of 5v or 3.3v if you want to embed it into a project. The i/o pins themselves are not 5v tolerant.
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