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Altera_Forum
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9 years ago

Cyclone V bidirectional half-duplex LVDS?

Dear All, We are designing a board with a Cyclone V connected to another (already existing) board via a bidirectional half-duplex LVDS link. We would prefer to use only 2 pins of the FPGA to im...
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Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

Yes, this is correct. Another area where Cyclone V differs from previous families. This would not work with Cyclone IV. DIFFERENTIAL 2.5-V SSTL CLASS I cannot be tri-stated there. However, Cyclone IV supports Bus LVDS. Cyclone V doesn't.

You seem to get "oe_b" for free - even if you don't want it. Tie it off low if you're happy using a single ended signal driving "oe".

Cheers,

Alex