-------------------------------------------------------------------------------
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-- --
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-- O R E G A N O S Y S T E M S --
-- --
-- Design & Consulting --
-- --
-------------------------------------------------------------------------------
-- --
-- Web: http://www.oregano.at/ --
-- --
-- Contact: mc8051@oregano.at --
-- --
-------------------------------------------------------------------------------
-- --
-- MC8051 - VHDL 8051 Microcontroller IP Core --
-- Copyright (C) 2001 OREGANO SYSTEMS --
-- --
-- This library is free software; you can redistribute it and/or --
-- modify it under the terms of the GNU Lesser General Public --
-- License as published by the Free Software Foundation; either --
-- version 2.1 of the License, or (at your option) any later version. --
-- --
-- This library is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
-- Lesser General Public License for more details. --
-- --
-- Full details of the license can be found in the file LGPL.TXT. --
-- --
-- You should have received a copy of the GNU Lesser General Public --
-- License along with this library; if not, write to the Free Software --
-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA --
-- --
-------------------------------------------------------------------------------
--
--
-- Author: Helmut Mayrhofer
--
-- Filename: mc8051_top_struc.vhd
--
-- Date of Creation: Mon Aug 9 12:14:48 1999
--
-- Version: $Revision: 1.7 $
--
-- Date of Latest Version: $Date: 2002/01/07 12:17:45 $
--
--
-- Description: Connect the mc8051 core to its instruction and data
-- memories.
--
--
--
--
-------------------------------------------------------------------------------
architecture struc of mc8051_top is
signal s_rom_adr: std_logic_vector(15 downto 0); -- Programmcounter =
-- ROM-adress
signal s_rom_data: std_logic_vector(7 downto 0); -- data input from ROM
signal s_ram_data_out: std_logic_vector(7 downto 0); -- data output to
-- internal RAM
signal s_ram_data_in: std_logic_vector(7 downto 0); -- data input from
-- internal RAM
signal s_ram_adr: std_logic_vector(6 downto 0); -- internal RAM-adress
signal s_ram_wr: std_logic; -- read (0)/write (1)
-- internal RAM
signal s_ram_en: std_logic; -- RAM-block enable
signal s_ramx_data_out: std_logic_vector(7 downto 0); -- data output to
-- ext. RAM
signal s_ramx_data_in: std_logic_vector(7 downto 0); -- data input from
-- ext. RAM
signal s_ramx_adr: std_logic_vector(15 downto 0); -- ext. RAM-adress
signal s_ramx_wr: std_logic; -- read (0)/write (1)
-- ext. RAM
begin -- architecture structural
i_mc8051_core : mc8051_core
port map(clk => clk,
reset => reset,
rom_data_i => s_rom_data,
ram_data_i => s_ram_data_out,
int0_i => int0_i,
int1_i => int1_i,
all_t0_i => all_t0_i,
all_t1_i => all_t1_i,
all_rxd_i => all_rxd_i,
p0_i => p0_i,
p1_i => p1_i,
p2_i => p2_i,
p3_i => p3_i,
p0_o => p0_o,
p1_o => p1_o,
p2_o => p2_o,
p3_o => p3_o,
all_rxd_o => all_rxd_o,
all_txd_o => all_txd_o,
all_rxdwr_o => all_rxdwr_o,
rom_adr_o => s_rom_adr,
ram_data_o => s_ram_data_in,
ram_adr_o => s_ram_adr,
ram_wr_o => s_ram_wr,
ram_en_o => s_ram_en,
datax_i => s_ramx_data_in,
datax_o => s_ramx_data_out,
adrx_o => s_ramx_adr,
wrx_o => s_ramx_wr);
-----------------------------------------------------------------------------
-- Hook up the general purpose 128x8 synchronous on-chip RAM.
i_mc8051_ram : mc8051_ram
port map (clk => clk,
reset => reset,
ram_adr_i => s_ram_adr,
ram_data_i => s_ram_data_in,
ram_wr_i => s_ram_wr,
ram_en_i => s_ram_en,
ram_data_o => s_ram_data_out);
-- THIS RAM IS A MUST HAVE!!
-----------------------------------------------------------------------------
-----------------------------------------------------------------------------
-- Hook up the (up to) 64kx8 synchronous on-chip ROM.
i_mc8051_rom : mc8051_rom
port map (clk => clk,
reset => reset,
rom_adr_i => s_rom_adr,
rom_data_o => s_rom_data);
-- THE ROM OF COURSE IS A MUST HAVE, ALTHOUGH THE SIZE CAN BE SMALLER!!
-----------------------------------------------------------------------------
-----------------------------------------------------------------------------
-- Hook up the (up to) 64kx8 synchronous RAM.
i_mc8051_ramx : mc8051_ramx
port map (clk => clk,
reset => reset,
ram_adr_i => s_ramx_adr,
ram_data_i => s_ramx_data_out,
ram_wr_i => s_ramx_wr,
ram_data_o => s_ramx_data_in);
-- THIS RAM (IF USED) CAN BE ON OR OFF CHIP, THE SIZE IS ARBITRARY.
-----------------------------------------------------------------------------
end struc;
