Hi all!
I'm starting a new design which deal with a cPCI inteface. I know that the computer board as a 5V signaling. This mean that all the board into the bus must have a 5V signaling or at least be 5V tolerant? An FPGA that can't tolerate the 5V will blow up?
You can use MOS switches to trim the levels to 3.3V so that the FPGA will see 0V to 3.3V. In the other direction, the signals going to the FPGA will send 3.3V to the PCI bus. Although the PCI bus is 5V, most systems will work with 0V/3.3V signalling.
There are specialised MOS switches array, with very low impedance.
Hi,
Use a switch or level converter isn't a smart way to solve this problem.
You can choose a FPGA which supports PCI interface.
PLS check the spec. of FPGAs. (see the attached file).
BTW, PCI is 3.3V