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Altera_Forum
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14 years ago

does altlvds have termination 100 ohm setting_

In my Desin, receiver pins from ADC are set to LVDS. According to http://www.altera.com/literature/hb/stx2/stx2_sii52004.pdf (https://imail.datarespons.com/owa/redir.aspx?c=7c40eefd45214092bdb96d...
Altera_Forum's avatar
Altera_Forum
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14 years ago

You have to set the terminations explicitly. The ALTLVDS_RX component will not do it for you, since it can not know whether you have already used an external termination.

If you use Tcl, the constraint is of the form:

set_instance_assignment -name STRATIXII_TERMINATION DIFFERENTIAL -to $port

where $port is the signal name.

Cheers,

Dave