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[/] [gecko4/] [trunk/] [GECKO4com/] [spartan200_an/] [vhdl/] [fifos/] [fifo_4kb_8w_16r-entity.vhdl] - Blame information for rev 5

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1 5 ktt1
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--            _   _            __   ____                                      --
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--           / / | |          / _| |  __|                                     --
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--           | |_| |  _   _  / /   | |_                                       --
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--           |  _  | | | | | | |   |  _|                                      --
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--           | | | | | |_| | \ \_  | |__                                      --
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--           |_| |_| \_____|  \__| |____| microLab                            --
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--                                                                            --
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--           Bern University of Applied Sciences (BFH)                        --
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--           Quellgasse 21                                                    --
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--           Room HG 4.33                                                     --
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--           2501 Biel/Bienne                                                 --
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--           Switzerland                                                      --
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--                                                                            --
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--           http://www.microlab.ch                                           --
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--------------------------------------------------------------------------------
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--   GECKO4com
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--  
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--   2010/2011 Dr. Theo Kluter
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--  
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--   This VHDL code is free code: you can redistribute it and/or modify
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--   it under the terms of the GNU General Public License as published by
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--   the Free Software Foundation, either version 3 of the License, or
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--   (at your option) any later version.
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--  
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--   This VHDL code is distributed in the hope that it will be useful,
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--   but WITHOUT ANY WARRANTY; without even the implied warranty of
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--   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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--   GNU General Public License for more details. 
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--   You should have received a copy of the GNU General Public License
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--   along with these sources.  If not, see <http://www.gnu.org/licenses/>.
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--
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LIBRARY ieee;
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USE ieee.std_logic_1164.all;
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USE ieee.std_logic_arith.all;
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-- Important: This fifo allowes only a pop when at least 2
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--            bytes are pushed. When only 1 byte is in the
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--            fifo, it cannot be poped!
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ENTITY fifo_4kb_8w_16r IS
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   PORT ( clock      : IN  std_logic;
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          reset      : IN  std_logic;
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          -- push port
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          push       : IN  std_logic;
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          push_data  : IN  std_logic_vector(  7 DOWNTO 0 );
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          push_last  : IN  std_logic;
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          -- pop port
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          pop        : IN  std_logic;
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          pop_data   : OUT std_logic_vector( 15 DOWNTO 0 );
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          pop_last   : OUT std_logic_vector(  1 DOWNTO 0 );
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          -- control port
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          fifo_full  : OUT std_logic;
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          fifo_empty : OUT std_logic;
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          byte_cnt   : OUT std_logic_vector( 12 DOWNTO 0 ) );
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END fifo_4kb_8w_16r;

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