CAUSE: The specified instance of the
ALT_BIDIR_DIFF or the
ALT_BIDIR_BUF I/O primitive is not connected to the altddio_bidir
megafunction. This is illegal. The primitive must be used with the altddio_bidir megafunction.
The ports of the primitive must be connected as
follows:
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
|
bidirectional pin |
iobar
|
bidirectional pin |
ALT_BIDIR_BUF
port
|
Connected to
|
bidirin |
the padio port of the altddio_bidir megafunction |
oe
|
the oe_out port of the altddio_bidir megafunction |
io
|
bidirectional pin |
ACTION: Use the primitive with the altddio_bidir megafunction and compile the design again. If you just want to name your negative bidirectional pin,
use the ALT_IOBUF_DIFF or the ALT_IOBUF primitive instead.