mt48lc32m8a2.vhd

vhdl cod for ram.For sp3e

    RASNeg_nwv <= To_UX01(RASNeg_ipd);
    CSNeg_nwv  <= To_UX01(CSNeg_ipd);
    CASNeg_nwv <= To_UX01(CASNeg_ipd);
    CLK_nwv <= To_UX01(CLK_ipd);
    CKE_nwv <= To_UX01(CKE_ipd);
    BA0_nwv <= To_UX01(BA0_ipd);
    BA1_nwv <= To_UX01(BA1_ipd);
    DQM_nwv <= To_UX01(DQM_ipd);
    DQ0_nwv <= To_UX01(DQ0_ipd);
    DQ1_nwv <= To_UX01(DQ1_ipd);
    DQ2_nwv <= To_UX01(DQ2_ipd);
    DQ3_nwv <= To_UX01(DQ3_ipd);
    DQ4_nwv <= To_UX01(DQ4_ipd);
    DQ5_nwv <= To_UX01(DQ5_ipd);
    DQ6_nwv <= To_UX01(DQ6_ipd);
    DQ7_nwv <= To_UX01(DQ7_ipd);
    A0_nwv  <= To_UX01(A0_ipd);
    A1_nwv  <= To_UX01(A1_ipd);
    A2_nwv  <= To_UX01(A2_ipd);
    A3_nwv  <= To_UX01(A3_ipd);
    A4_nwv  <= To_UX01(A4_ipd);
    A5_nwv  <= To_UX01(A5_ipd);
    A6_nwv  <= To_UX01(A6_ipd);
    A7_nwv  <= To_UX01(A7_ipd);
    A8_nwv  <= To_UX01(A8_ipd);
    A9_nwv  <= To_UX01(A9_ipd);
    A10_nwv <= To_UX01(A10_ipd);
    A11_nwv <= To_UX01(A11_ipd);
    A12_nwv <= To_UX01(A12_ipd);

    ----------------------------------------------------------------------------
    -- Main Behavior Block
    ----------------------------------------------------------------------------
    Main : BLOCK

        PORT (
            BAIn            : IN    std_logic_vector(1 downto 0);
            DQMIn           : IN    std_ulogic := 'X';
            DataIn          : IN    std_logic_vector(7 downto 0);
            DataOut         : OUT   std_logic_vector(7 downto 0)
                                                     := (others => 'Z');
            CLKIn           : IN    std_ulogic := 'X';
            CKEIn           : IN    std_ulogic := 'X';
            AddressIn       : IN    std_logic_vector(12 downto 0);
            WENegIn         : IN    std_ulogic := 'X';
            RASNegIn        : IN    std_ulogic := 'X';
            CSNegIn         : IN    std_ulogic := 'X';
            CASNegIn        : IN    std_ulogic := 'X'
        );
        PORT MAP (
            BAIn(0) => BA0_nwv,
            BAIn(1) => BA1_nwv,
            DQMIn   => DQM_nwv,
            DataOut(0) =>  DQ0,
            DataOut(1) =>  DQ1,
            DataOut(2) =>  DQ2,
            DataOut(3) =>  DQ3,
            DataOut(4) =>  DQ4,
            DataOut(5) =>  DQ5,
            DataOut(6) =>  DQ6,
            DataOut(7) =>  DQ7,
            DataIn(0) =>  DQ0_nwv,
            DataIn(1) =>  DQ1_nwv,
            DataIn(2) =>  DQ2_nwv,
            DataIn(3) =>  DQ3_nwv,
            DataIn(4) =>  DQ4_nwv,
            DataIn(5) =>  DQ5_nwv,
            DataIn(6) =>  DQ6_nwv,
            DataIn(7) =>  DQ7_nwv,
            CLKIn => CLK_nwv,
            CKEIn => CKE_nwv,
            AddressIn(0) => A0_nwv,
            AddressIn(1) => A1_nwv,
            AddressIn(2) => A2_nwv,
            AddressIn(3) => A3_nwv,
            AddressIn(4) => A4_nwv,
            AddressIn(5) => A5_nwv,
            AddressIn(6) => A6_nwv,
            AddressIn(7) => A7_nwv,
            AddressIn(8) => A8_nwv,
            AddressIn(9) => A9_nwv,
            AddressIn(10) => A10_nwv,
            AddressIn(11) => A11_nwv,
            AddressIn(12) => A12_nwv,
            WENegIn  => WENeg_nwv,
            RASNegIn => RASNeg_nwv,
            CSNegIn  => CSNeg_nwv,
            CASNegIn => CASNeg_nwv
        );

        -- Type definition for state machine
        TYPE mem_state IS (pwron,
                           precharge,
                           idle,
                           mode_set,
                           self_refresh,
                           self_refresh_rec,
                           auto_refresh,
                           pwrdwn,
                           bank_act,
                           bank_act_pwrdwn,
                           write,
                           write_suspend,
                           read,
                           read_suspend,
                           write_auto_pre,
                           read_auto_pre
                          );

        TYPE statebanktype IS array (hi_bank downto 0) of mem_state;

        SIGNAL statebank : statebanktype;

        SIGNAL CAS_Lat  : NATURAL RANGE 0 to 3 := 0;
        SIGNAL D_zd     : std_logic_vector(7 DOWNTO 0);

    BEGIN

    PoweredUp <= true after tpowerup;

    ----------------------------------------------------------------------------
    -- Main Behavior Process
    ----------------------------------------------------------------------------
        Behavior : PROCESS (BAIn, DQMIn, DataIn, CLKIn,
                            CKEIn, AddressIn, WENegIn, RASNegIn, CSNegIn,
                            CASNegIn, PoweredUp)

            -- Type definition for commands
            TYPE command_type is (desl,
                                  nop,
                                  bst,
                                  read,
                                  writ,
                                  act,
                                  pre,
                                  mrs,
                                  ref
                                 );

            -- Timing Check Variables
            VARIABLE Tviol_BA_CLK       : X01 := '0';
            VARIABLE TD_BA_CLK          : VitalTimingDataType;

            VARIABLE Tviol_DQM_CLK      : X01 := '0';
            VARIABLE TD_DQM_CLK         : VitalTimingDataType;

            VARIABLE Tviol_D0_CLK       : X01 := '0';
            VARIABLE TD_D0_CLK          : VitalTimingDataType;

            VARIABLE Tviol_CKE_CLK      : X01 := '0';
            VARIABLE TD_CKE_CLK         : VitalTimingDataType;

            VARIABLE Tviol_Address_CLK  : X01 := '0';
            VARIABLE TD_Address_CLK     : VitalTimingDataType;

            VARIABLE Tviol_WENeg_CLK    : X01 := '0';
            VARIABLE TD_WENeg_CLK       : VitalTimingDataType;

            VARIABLE Tviol_RASNeg_CLK   : X01 := '0';
            VARIABLE TD_RASNeg_CLK      : VitalTimingDataType;

            VARIABLE Tviol_CSNeg_CLK    : X01 := '0';
            VARIABLE TD_CSNeg_CLK       : VitalTimingDataType;

            VARIABLE Tviol_CASNeg_CLK   : X01 := '0';
            VARIABLE TD_CASNeg_CLK      : VitalTimingDataType;

            VARIABLE Pviol_CLK     : X01 := '0';
            VARIABLE PD_CLK        : VitalPeriodDataType := VitalPeriodDataInit;

            -- Memory array declaration
            TYPE MemStore IS ARRAY (0 to depth) OF INTEGER
                             RANGE  -2 TO 255;

            TYPE MemBlock IS ARRAY (0 to 3) OF MemStore;
            TYPE Burst_type IS (sequential, interleave);
            TYPE Write_Burst_type IS (programmed, single);
            TYPE sequence IS ARRAY (0 to 7) OF NATURAL RANGE 0 to 7;
            TYPE seqtab   IS ARRAY (0 to 7) OF sequence;
            TYPE MemLoc   IS ARRAY (0 to 3) OF std_logic_vector(22 DOWNTO 0);
            TYPE burst_counter  IS ARRAY (0 to 3) OF NATURAL RANGE 0 to 257;
            TYPE StartAddr_type IS ARRAY (0 to 3) OF NATURAL RANGE 0 TO 7;
            TYPE Burst_Inc_type IS ARRAY (0 to 3) OF NATURAL RANGE 0 TO 255;
            TYPE BaseLoc_type   IS ARRAY (0 to 3) OF NATURAL RANGE 0 TO depth;
            SUBTYPE OutWord IS std_logic_vector(7 DOWNTO 0);

            CONSTANT seq0 : sequence := (0 & 1 & 2 & 3 & 4 & 5 & 6 & 7);
            CONSTANT seq1 : sequence := (1 & 0 & 3 & 2 & 5 & 4 & 7 & 6);
            CONSTANT seq2 : sequence := (2 & 3 & 0 & 1 & 6 & 7 & 4 & 5);
            CONSTANT seq3 : sequence := (3 & 2 & 1 & 0 & 7 & 6 & 5 & 4);
            CONSTANT seq4 : sequence := (4 & 5 & 6 & 7 & 0 & 1 & 2 & 3);
            CONSTANT seq5 : sequence := (5 & 4 & 7 & 6 & 1 & 0 & 3 & 2);
            CONSTANT seq6 : sequence := (6 & 7 & 4 & 5 & 2 & 3 & 0 & 1);
            CONSTANT seq7 : sequence := (7 & 6 & 5 & 4 & 3 & 2 & 1 & 0);
            CONSTANT intab : seqtab := (seq0, seq1, seq2, seq3, seq4, seq5,
                                        seq6, seq7);

            FILE mem_file       : text IS mem_file_name;
            VARIABLE MemData    : MemBlock;
            VARIABLE file_bank  : NATURAL := 0;
            VARIABLE ind        : NATURAL := 0;
            VARIABLE buf        : line;

            VARIABLE MemAddr      : MemLoc;
            VARIABLE Location     : NATURAL RANGE 0 TO depth := 0;
            VARIABLE BaseLoc      : BaseLoc_type;
            VARIABLE Burst_Inc    : Burst_Inc_type;
            VARIABLE StartAddr    : StartAddr_type;

            VARIABLE Burst_Length : NATURAL RANGE 0 TO 256 := 0;
            VARIABLE Burst_Bits   : NATURAL RANGE 0 TO 7   := 0;
            VARIABLE Burst        : Burst_Type;
            VARIABLE WB           : Write_Burst_Type;
            VARIABLE Burst_Cnt    : burst_counter;

            VARIABLE command    : command_type;
            VARIABLE written    : boolean := false;
            VARIABLE chip_en    : boolean := false;

            VARIABLE cur_bank   : natural range 0 to hi_bank;

            VARIABLE ModeReg    : std_logic_vector(12 DOWNTO 0)
                                   := (OTHERS => 'X');

            VARIABLE Ref_Cnt      : NATURAL RANGE 0 TO 4096 := 0;
            VARIABLE next_ref     : TIME;
            VARIABLE BankString   : STRING(8 DOWNTO 1) := " Bank-X ";

            -- Functionality Results Variables
            VARIABLE Violation  : X01 := '0';
            VARIABLE DataDriveOut :  std_logic_vector(7 DOWNTO 0)
                                   := (OTHERS => 'Z');
            VARIABLE DataDrive  : OutWord;
            VARIABLE DataDrive1 : OutWord;
            VARIABLE DataDrive2 : OutWord;
            VARIABLE DataDrive3 : OutWord;
            VARIABLE DQM_reg0  : UX01;
            VARIABLE DQM_reg1  : UX01;
            VARIABLE DQM_reg2  : UX01;

        BEGIN

            --------------------------------------------------------------------
            -- Timing Check Section
            --------------------------------------------------------------------
            IF (TimingChecksOn) THEN

                VitalSetupHoldCheck (
                    TestSignal      => BAIn,
                    TestSignalName  => "BA",
                    RefSignal       => CLKIn,
                    RefSignalName   => "CLK",
                    SetupHigh       => tsetup_DQ0_CLK,
                    SetupLow        => tsetup_DQ0_CLK,
                    HoldHigh        => thold_DQ0_CLK,
                    HoldLow         => thold_DQ0_CLK,
                    CheckEnabled    => chip_en,
                    RefTransition   => '/',
                    HeaderMsg       => InstancePath & PartID,
                    TimingData      => TD_BA_CLK,
                    XOn             => XOn,
                    MsgOn           => MsgOn,
                    Violation       => Tviol_BA_CLK );

                VitalSetupHoldCheck (
                    TestSignal      => DQMIn,
                    TestSignalName  => "DQM",
                    RefSignal       => CLKIn,
                    RefSignalName   => "CLK",
                    SetupHigh       => tsetup_DQ0_CLK,
                    SetupLow        => tsetup_DQ0_CLK,
                    HoldHigh        => thold_DQ0_CLK,
                    HoldLow         => thold_DQ0_CLK,
                    CheckEnabled    => chip_en,
                    RefTransition   => '/',
                    HeaderMsg       => InstancePath & PartID,
                    TimingData      => TD_DQM_CLK,
                    XOn             => XOn,
                    MsgOn           => MsgOn,
                    Violation       => Tviol_DQM_CLK );

                VitalSetupHoldCheck (
                    TestSignal      => DataIn,
                    TestSignalName  => "Data",
                    RefSignal       => CLKIn,
                    RefSignalName   => "CLK",
                    SetupHigh       => tsetup_DQ0_CLK,