ID:13071 The ALT_BIDIR_DIFF or the ALT_BIDIR_BUF primitive instance <name> is used in an illegal configuration
CAUSE: The specified instance of the ALT_BIDIR_DIFF or the ALT_BIDIR_BUF I/O primitive is used in an illegal configuration.
The ports of the primitive must be connected as follows:
ALT_BIDIR_DIFF
ALT_BIDIR_BUF
Note that all the ports should be directly connected in the specified way. This error can also occur if there is any inversion in between.
This error can also occur if the padio port of the altddio_bidir megafunction has multiple fanouts. The port must have a single fanout to the primitive.
Example usage:
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 |
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 |
module ddio_top (aset, combout, datain_h, datain_l, inclock, sclr, oe, outclock, bidir1, bidir2 ); input aset; input sclr; output combout; input datain_h; input datain_l; input inclock; input oe; input outclock; inout bidir1; inout bidir2; wire tmp_oe; wire tmp_padio; myddio_bidir sample_ddio(.aset(aset), .combout(combout), .datain_h (datain_h), .datain_l(datain_l), .inclock(inclock), .oe(oe), .outclock(outclock), .padio(tmp_padio), .oe_out(tmp_oe), .sclr(sclr)); alt_bidir_diff my_bidir (.bidirin(tmp_padio), .oe (tmp_oe), .io(bidir1), .iobar(bidir2)); endmodule
ACTION: Use the primitive with the altddio_bidir megafunction and compile the design again. If you just care about naming your negative bidirectional pin, use the ALT_IOBUF_DIFF or the ALT_IOBUF primitive instead.