Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
7 years ago

Can I safely ignore warning that output pin cannot be tristated?

Dear all, I have the following code for driving the output and input of my design: Fout_DATA <= DATA; Fout_BE <= BE; Fout_RXF <= RXF; Fout_TXE <= TXE; WR <= Fin_WR; DATA(31 downto 16) <= i...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
7 years ago

Its probably because you have fout_data and data being the same signal.

INOUTs should only connect directly the to top level, you appear to have it connected to part of your design and the pin?

Another point - you have DATA connected to (others => '0') when BE_out_en is not '0' or '1'. If this is a trap for simulation faults, it is much safer if you connect it to (others => 'X').