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Altera_Forum's avatar
Altera_Forum
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15 years ago

5V to 3.3V bus and vice versa

MC68000 to CycloneII There is something wrong with quickswich devices. As I know MC68000 cant support 3.3V (some versions can but mine just cant). When i use quickswich any type i only get ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

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Yes that is the problem. I know about solution that you proposed but it is to complicated. I must find one device who can perform all of that. I just dont have the space for that on the board. But thank you for your response.

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How much logic do you need in the FPGA, and what is it doing?

If you do not need too much logic in the FPGA, then use a 5V device. The older generation FLEX10KA FPGAs are 5V tolerant, and are still available (I have boards that use them). What about a MAX CPLD?

Cheers,

Dave