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Altera_Forum's avatar
Altera_Forum
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18 years ago

Tristating LVDS in Cyclone

In my design there is a Cyclone with LVDS transmitter that is always powered (in standby) The LVDS interface is connected to an LVDS receiver in a STRATIXII device that is not always powered. If...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Tristating LVDS is not possible.

But : In my case it is not necessary because the Stratix II ( and cycloneII too) has the hot socket feature.

See - http://www.altera.com/literature/hb/stx2/stx2_sii51004.pdf

■ The device can be driven before power-up without any damage to the device itself.

So, leaving LVDS powered, while the Stratix is not powered is no issue.:D