Hi,
I want to feed data from a piso into a obufds. I have my code attached. When I try to synthesize it, I get this error:
ERROR:HDLParsers:850 - "D:/Daten/xilinx/led_test/led_test/led_test.vhd" Line 183. Formal port IOSTANDARD does not exist in Component 'OBUFDS'.
I have the component declared like this:
component OBUFDS is port (I : in STD_LOGIC; O : out STD_LOGIC; OB : out STD_LOGIC); end component;
I can not find the error.
Another question: Can I connect a normal net to a obufds? Or should I put a buf manually in front of it?
regards, Benjamin
My code:
-- generates serial data for one lvds-pair process (lvds_tick) begin if load_lvds= '1' then reg lvds_1_out_n, -- Diff_n output (connect directly to top-level port) I => lvds_1_in -- Buffer input );