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Altera_Forum
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16 years ago

LVDS tristating usage

Hello, 1. Could anybody suggest whether ALT_OUTBUF_TRI_DIFF can be used at the moment? I was trying to select Cyclone III, Stratix IV - and it looks like this primitive does not supported at ...
Altera_Forum's avatar
Altera_Forum
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16 years ago

1. So is this a problem of slaves to tri-state the line?

I don't need to have RX biderectional - only a possibility to tri-state it.

2. I was reading "High-Speed Differential Interfaces in Cyclone III Devices" document and "designing with low-level primitives" but did not find something proper.

I need only to know if it is possible to tri-state LVDS in Cyclone III. I've heard different opinions - somebody say that it is not possible for all Altera devices, and somebody told me that it not possible for Cyclone II or some older families only.