| Author |
Message |
ALuPin@web.de
Guest
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 Posted:
Mon Dec 19, 2005 5:15 pm Post subject:
Differential Pin Pairs in Lattice EC FPGAs |
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Hi newsgroup,
Altera has a command which is described as follows:
| Quote: | The Show Differential Pin Pairs command shows a red connection line between a pair of >differential pins. When one of the pins is assigned to a node that has a differential I/O >standard assignment, the complementary pin is considered assigned and unavailable for >future pin assignments.
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Does Lattice provide something similar for its EC/ECP familily ?
Rgds
André |
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Antti Lukats
Guest
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| Posted:
Mon Dec 19, 2005 5:15 pm Post subject:
Re: Differential Pin Pairs in Lattice EC FPGAs |
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<ALuPin@web.de> schrieb im Newsbeitrag
news:1135009295.991659.181970@g47g2000cwa.googlegroups.com...
Hi newsgroup,
Altera has a command which is described as follows:
| Quote: | The Show Differential Pin Pairs command shows a red connection line between
a pair of >differential pins. When one of the pins is assigned to a node
that has a differential I/O >standard assignment, the complementary pin is
considered assigned and unavailable for >future pin assignments.
|
Does Lattice provide something similar for its EC/ECP familily ?
Rgds
André
yes they do
antti |
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Antti Lukats
Guest
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| Posted:
Tue Dec 20, 2005 9:15 am Post subject:
Re: Differential Pin Pairs in Lattice EC FPGAs |
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<ALuPin@web.de> schrieb im Newsbeitrag
news:1135064646.387219.84000@o13g2000cwo.googlegroups.com...
Hi Antti,
thank you for your answer. I forgot to ask what this
corresponding command is. ;o)
My search in the EC/ECP handbook was unsuccessful.
Rgds
André
| Quote: | Antti Lukats wrote
yes they do
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there is nothing special or nothing to know, just use diff prim and connect
one iopad the second will be autoassigned - thats it nothing special to
worry about
Antti |
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ALuPin@web.de
Guest
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| Posted:
Tue Dec 20, 2005 9:15 am Post subject:
Re: Differential Pin Pairs in Lattice EC FPGAs |
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Yes you are right, there is nothing special to worry about.
The Place and Route Report shows that the second IO is
reserved
whereas the Post-Place-and-Route Floorplanner does not
show any connection between the two IOs. But it should
be assumed that the connection does exist ...
Rgds
André |
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ALuPin@web.de
Guest
|
| Posted:
Tue Dec 20, 2005 9:15 am Post subject:
Re: Differential Pin Pairs in Lattice EC FPGAs |
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Hi Antti,
thank you for your answer. I forgot to ask what this
corresponding command is. ;o)
My search in the EC/ECP handbook was unsuccessful.
Rgds
André
| Quote: | Antti Lukats wrote
yes they do |
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