CAUSE: The specified port of the specified I/O primitive is not connected. The port should be connected according to the following rules:
ALT_INBUF/ALT_INBUF_DIFF
port
|
Connected to
|
i |
input pin |
ibar |
input pin |
o |
anything |
ALT_OUTBUF/ALT_OUTBUF_DIFF
port
|
Connected to
|
i |
anything |
o |
output pin |
obar |
output pin |
ALT_OUTBUF_TRI/ALT_OUTBUF_TRI_DIFF
port
|
Connected to
|
i |
anything |
oe |
anything |
o |
output pin |
obar |
output pin |
ALT_IOBUF/ALT_IOBUF_DIFF
port
|
Connected to
|
i |
anything |
oe |
anything |
o |
anything |
io |
bidir pin |
iobar |
bidir pin |
ALT_BIDIR_BUF/ALT_BIDIR_DIFF
port
|
Connected to
|
bidirin |
the padio port of the altddio_bidir megafunction |
oe |
the oe_out port of the altddio_bidir megafunction |
io |
bidir pin |
iobar |
bidir pin |
ACTION: Connect the missing port and compile the design again.