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--************************************************************************************************

--  Top entity for AVR core

--  Version 1.82? (Special version for the JTAG OCD)

--  Designed by Ruslan Lepetenok 

--  Modified 31.08.2006

--  SLEEP and CLRWDT instructions support was added

--  BREAK instructions support was added 

--  PM clock enable was added

--************************************************************************************************

library IEEE;

use IEEE.std_logic_1164.all;

entity AVR_Core_cm2_top is port(

                        --Clock and reset

                            cp2         : in  std_logic;

                                                cp2en       : in  std_logic;

                        ireset      : in  std_logic;

                                            -- JTAG OCD support

                                            valid_instr : out std_logic;

                                                insert_nop  : in  std_logic;

                                                block_irq   : in  std_logic;

                                                change_flow : out std_logic;

                        -- Program Memory

                        pc          : out std_logic_vector(15 downto 0);

                        inst        : in  std_logic_vector(15 downto 0);

                        -- I/O control

                        adr         : out std_logic_vector(5 downto 0);

                        iore        : out std_logic;

                        iowe        : out std_logic;

                        -- Data memory control

                        ramadr      : out std_logic_vector(15 downto 0);

                        ramre       : out std_logic;

                        ramwe       : out std_logic;

                                                cpuwait     : in  std_logic;

                                                -- Data paths

                        dbusin      : in  std_logic_vector(7 downto 0);

                        dbusout     : out std_logic_vector(7 downto 0);

                        -- Interrupt

                        irqlines    : in  std_logic_vector(22 downto 0);

                        irqack      : out std_logic;

                        irqackad    : out std_logic_vector(4 downto 0);

                        --Sleep Control

                        sleepi      : out std_logic;

                        irqok       : out std_logic;

                        globint     : out std_logic;

                        --Watchdog

                        wdri        : out std_logic

                                                );

end AVR_Core_cm2_top;

architecture Struct of avr_core_cm2_top is

component AVR_Core_cm2 is port(

                cp2_cml_1 : in std_logic;

                        --Clock and reset

                            cp2         : in  std_logic;

                                                cp2en       : in  std_logic;

                        ireset      : in  std_logic;

                                            -- JTAG OCD support

                                            valid_instr : out std_logic;

                                                insert_nop  : in  std_logic;

                                                block_irq   : in  std_logic;

                                                change_flow : out std_logic;

                        -- Program Memory

                        pc          : out std_logic_vector(15 downto 0);

                        inst        : in  std_logic_vector(15 downto 0);

                        -- I/O control

                        adr         : out std_logic_vector(5 downto 0);

                        iore        : out std_logic;

                        iowe        : out std_logic;

                        -- Data memory control

                        ramadr      : out std_logic_vector(15 downto 0);

                        ramre       : out std_logic;

                        ramwe       : out std_logic;

                                                cpuwait     : in  std_logic;

                                                -- Data paths

                        dbusin      : in  std_logic_vector(7 downto 0);

                        dbusout     : out std_logic_vector(7 downto 0);

                        -- Interrupt

                        irqlines    : in  std_logic_vector(22 downto 0);

                        irqack      : out std_logic;

                        irqackad    : out std_logic_vector(4 downto 0);

                        --Sleep Control

                        sleepi      : out std_logic;

                        irqok       : out std_logic;

                        globint     : out std_logic;

                        --Watchdog

                        wdri        : out std_logic

                                                );

end component;

begin

AVR_Core_cm2_Inst:component AVR_Core_cm2 port map (

                cp2_cml_1 => cp2,

            -- Clock and reset

            cp2      => cp2,

                cp2en    => cp2en,

            ireset   => ireset,

                -- JTAG OCD support

                valid_instr => valid_instr,

                insert_nop  => insert_nop,

                block_irq   => block_irq,

                change_flow => change_flow,

                        -- Program Memory

                        pc  => pc, --        : out std_logic_vector(15 downto 0);   

                        inst  => inst  , --                : in  std_logic_vector(15 downto 0);

                        -- I/O control

                        adr  => adr  , --                 : out std_logic_vector(5 downto 0);   

                        iore  => iore  , --                : out std_logic;                       

                        iowe  => iowe  , --                : out std_logic;                                             

                        -- Data memory control

                        ramadr  => ramadr  , --              : out std_logic_vector(15 downto 0);

                        ramre  => ramre  , --               : out std_logic;

                        ramwe  => ramwe  , --               : out std_logic;

                                cpuwait  => cpuwait  , --             : in  std_logic;

                                -- Data paths

                        dbusin  => dbusin  , --              : in  std_logic_vector(7 downto 0);

                        dbusout  => dbusout  , --             : out std_logic_vector(7 downto 0);

                        -- Interrupt

                        irqlines  => irqlines  , --            : in  std_logic_vector(22 downto 0);

                        irqack  => irqack  , --              : out std_logic;

                        irqackad  => irqackad  , --            : out std_logic_vector(4 downto 0);

                        --Sleep Control

                        sleepi  => sleepi  , --             : out std_logic;

                        irqok  => irqok  , --               : out std_logic;

                        globint  => globint  , --                   : out std_logic;

                        --Watchdog

                        wdri  => wdri);

end Struct;