AR# 1462: EXEMPLAR - How do I prevent LeonardoSpectrum from inserting a BUFG?
AR# 1462
EXEMPLAR - How do I prevent LeonardoSpectrum from inserting a BUFG?
Description
Keywords: BUFG, insert, Virtex, prevent, none
Urgency: Standard
General Description: How do I prevent LeonardoSpectrum from inserting a BUFG?
Solution
1
Pass the "buffer_sig" attribute as a synthesis directive. For more information regarding passing attributes, please see the LeonardoSpectrum Reference Manual.
VHDL:
library ieee; use ieee.std_logic_1164.all;
entity ff is port (d, clk : in std_logic; q : out std_logic);
end entity;
architecture ff_arch of ff is
attribute buffer_sig : string; attribute buffer_sig of clk : signal is "none";
begin
process (clk) is begin if clk'event and clk = '1' then q <= d; end if; end process;
end architecture;
2
Pass the "buffer_sig" attribute as a synthesis directive. For more information regarding passing attributes, please see the LeonardoSpectrum Reference Manual.