cy7c1353b.vhd

vhdl cod for ram.For sp3e

        w_63 : VitalWireDelay (CLKENNeg_ipd, CLKENNeg, tipd_CLKENNeg);
        w_66 : VitalWireDelay (BWBNeg_ipd, BWBNeg, tipd_BWBNeg);
        w_67 : VitalWireDelay (BWANeg_ipd, BWANeg, tipd_BWANeg);
        w_68 : VitalWireDelay (CE1Neg_ipd, CE1Neg, tipd_CE1Neg);
        w_69 : VitalWireDelay (CE3Neg_ipd, CE3Neg, tipd_CE3Neg);
        w_70 : VitalWireDelay (CE2_ipd, CE2, tipd_CE2);
        w_71 : VitalWireDelay (CLK_ipd, CLK, tipd_CLK);
        w_72 : VitalWireDelay (LBONeg_ipd, LBONeg, tipd_LBONeg);
        w_73 : VitalWireDelay (OENeg_ipd, OENeg, tipd_OENeg);

    END BLOCK;

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

        PORT (
            BWBNIn          : IN    std_ulogic := 'U';
            BWANIn          : IN    std_ulogic := 'U';
            DatBIn          : IN    std_logic_vector(8 downto 0);
            DatAIn          : IN    std_logic_vector(8 downto 0);
            DataOut         : OUT   std_logic_vector(17 downto 0)
                                                     := (others => 'Z');
            CLKIn           : IN    std_ulogic := 'U';
            CKENIn          : IN    std_ulogic := 'U';
            AddressIn       : IN    std_logic_vector(17 downto 0);
            OENegIn         : IN    std_ulogic := 'U';
            RIn             : IN    std_ulogic := 'U';
            ADVIn           : IN    std_ulogic := 'U';
            CE2In           : IN    std_ulogic := 'U';
            LBONegIn        : IN    std_ulogic := '1';
            CE1NegIn        : IN    std_ulogic := 'U';
            CE3NegIn        : IN    std_ulogic := 'U'
        );
        PORT MAP (
            BWBNIn => BWBNeg_ipd,
            BWANIn => BWANeg_ipd,
            CLKIn => CLK_ipd,
            CKENIn => CLKENNeg_ipd,
            OENegIn => OENeg_ipd,
            RIn => R_ipd,
            ADVIn => ADV_ipd,
            CE2In => CE2_ipd,
            LBONegIn => LBONeg_ipd,
            CE1NegIn => CE1Neg_ipd,
            CE3NegIn => CE3Neg_ipd,
            DataOut(0) =>  DQA0,
            DataOut(1) =>  DQA1,
            DataOut(2) =>  DQA2,
            DataOut(3) =>  DQA3,
            DataOut(4) =>  DQA4,
            DataOut(5) =>  DQA5,
            DataOut(6) =>  DQA6,
            DataOut(7) =>  DQA7,
            DataOut(8) =>  DQA8,
            DataOut(9) =>  DQB0,
            DataOut(10) =>  DQB1,
            DataOut(11) =>  DQB2,
            DataOut(12) =>  DQB3,
            DataOut(13) =>  DQB4,
            DataOut(14) =>  DQB5,
            DataOut(15) =>  DQB6,
            DataOut(16) =>  DQB7,
            DataOut(17) =>  DQB8,
            DatAIn(0) =>  DQA0_ipd,
            DatAIn(1) =>  DQA1_ipd,
            DatAIn(2) =>  DQA2_ipd,
            DatAIn(3) =>  DQA3_ipd,
            DatAIn(4) =>  DQA4_ipd,
            DatAIn(5) =>  DQA5_ipd,
            DatAIn(6) =>  DQA6_ipd,
            DatAIn(7) =>  DQA7_ipd,
            DatAIn(8) =>  DQA8_ipd,
            DatBIn(0) =>  DQB0_ipd,
            DatBIn(1) =>  DQB1_ipd,
            DatBIn(2) =>  DQB2_ipd,
            DatBIn(3) =>  DQB3_ipd,
            DatBIn(4) =>  DQB4_ipd,
            DatBIn(5) =>  DQB5_ipd,
            DatBIn(6) =>  DQB6_ipd,
            DatBIn(7) =>  DQB7_ipd,
            DatBIn(8) =>  DQB8_ipd,
            AddressIn(0) => A0_ipd,
            AddressIn(1) => A1_ipd,
            AddressIn(2) => A2_ipd,
            AddressIn(3) => A3_ipd,
            AddressIn(4) => A4_ipd,
            AddressIn(5) => A5_ipd,
            AddressIn(6) => A6_ipd,
            AddressIn(7) => A7_ipd,
            AddressIn(8) => A8_ipd,
            AddressIn(9) => A9_ipd,
            AddressIn(10) => A10_ipd,
            AddressIn(11) => A11_ipd,
            AddressIn(12) => A12_ipd,
            AddressIn(13) => A13_ipd,
            AddressIn(14) => A14_ipd,
            AddressIn(15) => A15_ipd,
            AddressIn(16) => A16_ipd,
            AddressIn(17) => A17_ipd
        );

        -- Type definition for state machine
        TYPE mem_state IS (desel,
                           begin_rd,
                           begin_wr,
                           burst_rd,
                           burst_wr
                          );

        SIGNAL state: mem_state;
        SIGNAL next_state : mem_state:=desel;

        TYPE sequence IS ARRAY (0 to 3) OF INTEGER RANGE -3 to 3;
        TYPE seqtab IS ARRAY (0 to 3) OF sequence;

        CONSTANT il0 : sequence := (0, 1, 2, 3);
        CONSTANT il1 : sequence := (0, -1, 2, 1);
        CONSTANT il2 : sequence := (0, 1, -2, -1);
        CONSTANT il3 : sequence := (0, -1, -2, -3);
        CONSTANT il  : seqtab := (il0, il1, il2, il3);

        CONSTANT ln0 : sequence := (0, 1, 2, 3);
        CONSTANT ln1 : sequence := (0, 1, 2, -1);
        CONSTANT ln2 : sequence := (0, 1, -2, -1);
        CONSTANT ln3 : sequence := (0, -3, -2, -1);
        CONSTANT ln  : seqtab := (ln0, ln1, ln2, ln3);

        SIGNAL Burst_Seq : seqtab;

        SIGNAL D_zd      : std_logic_vector(17 DOWNTO 0);

    BEGIN

        state<=next_state;
        Burst_Setup : PROCESS

        BEGIN

           IF (LBONegIn = '1') THEN
               Burst_Seq <= il;
           ELSE
               Burst_Seq <= ln;
           END IF;
           WAIT;    -- Mode can be set only during power up

        END PROCESS Burst_Setup;

    ----------------------------------------------------------------------------
    -- Main Behavior Process
    ----------------------------------------------------------------------------
        Behavior : PROCESS (BWBNIn, BWANIn,DatBIn, DatAIn, CLKIn, CKENIn,
                            AddressIn, RIn, OENegIn, ADVIn, CE2In, CE1NegIn,
                            CE3NegIn)

            -- Type definition for commands
            TYPE command_type is (ds,
                                  burst,
                                  read,
                                  write
                                 );

            -- Timing Check Variables

            VARIABLE Tviol_BWBN_CLK     : X01 := '0';
            VARIABLE TD_BWBN_CLK        : VitalTimingDataType;

            VARIABLE Tviol_BWAN_CLK     : X01 := '0';
            VARIABLE TD_BWAN_CLK        : VitalTimingDataType;

            VARIABLE Tviol_CKENIn_CLK   : X01 := '0';
            VARIABLE TD_CKENIn_CLK      : VitalTimingDataType;

            VARIABLE Tviol_ADVIn_CLK    : X01 := '0';
            VARIABLE TD_ADVIn_CLK       : VitalTimingDataType;

            VARIABLE Tviol_CE1NegIn_CLK : X01 := '0';
            VARIABLE TD_CE1NegIn_CLK    : VitalTimingDataType;

            VARIABLE Tviol_CE3NegIn_CLK : X01 := '0';
            VARIABLE TD_CE3NegIn_CLK    : VitalTimingDataType;

            VARIABLE Tviol_CE2In_CLK    : X01 := '0';
            VARIABLE TD_CE2In_CLK       : VitalTimingDataType;

            VARIABLE Tviol_RIn_CLK      : X01 := '0';
            VARIABLE TD_RIn_CLK         : VitalTimingDataType;

            VARIABLE Tviol_DatBIn_CLK   : X01 := '0';
            VARIABLE TD_DatBIn_CLK      : VitalTimingDataType;

            VARIABLE Tviol_DatAIn_CLK   : X01 := '0';
            VARIABLE TD_DatAIn_CLK      : VitalTimingDataType;

            VARIABLE Tviol_AddressIn_CLK      : X01 := '0';
            VARIABLE TD_AddressIn_CLK         : VitalTimingDataType;

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

            -- Memory array declaration
            TYPE MemStore IS ARRAY (0 to 262143) OF INTEGER
                             RANGE  -2 TO 511;

            VARIABLE MemDataA   : MemStore;
            VARIABLE MemDataB   : MemStore;
          
            VARIABLE MemAddr    : NATURAL RANGE 0 TO 262143;
            VARIABLE startaddr  : NATURAL RANGE 0 TO 262143;

            VARIABLE Burst_Cnt  : NATURAL RANGE 0 TO 4 := 0;
            VARIABLE memstart   : NATURAL RANGE 0 TO 3 := 0;
            VARIABLE offset     : INTEGER RANGE -3 TO 3 := 0;

            VARIABLE command : command_type;

            VARIABLE BWB1    : UX01;
            VARIABLE BWA1    : UX01;

            VARIABLE wr1     : boolean := false;
            VARIABLE wr2     : boolean := false;

            -- Functionality Results Variables
            VARIABLE Violation  : X01 := '0';

            VARIABLE OBuf1      : std_logic_vector(17 DOWNTO 0)
                                   := (OTHERS => 'Z');
 
         BEGIN

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

                VitalSetupHoldCheck (
                    TestSignal      => BWBNIn,
                    TestSignalName  => "BWB",
                    RefSignal       => CLKIn,
                    RefSignalName   => "CLK",
                    SetupHigh       => tsetup_BWANeg_CLK,
                    SetupLow        => tsetup_BWANeg_CLK,
                    HoldHigh        => thold_BWANeg_CLK,
                    HoldLow         => thold_BWANeg_CLK,
                    CheckEnabled    => (CKENIn ='0'),
                    RefTransition   => '/',
                    HeaderMsg       => InstancePath & PartID,
                    TimingData      => TD_BWBN_CLK,
                    XOn             => XOn,
                    MsgOn           => MsgOn,
                    Violation       => Tviol_BWBN_CLK );

                VitalSetupHoldCheck (
                    TestSignal      => BWANIn,
                    TestSignalName  => "BWA",
                    RefSignal       => CLKIn,
                    RefSignalName   => "CLK",
                    SetupHigh       => tsetup_BWANeg_CLK,
                    SetupLow        => tsetup_BWANeg_CLK,
                    HoldHigh        => thold_BWANeg_CLK,
                    HoldLow         => thold_BWANeg_CLK,
                    CheckEnabled    => (CKENIn ='0'),
                    RefTransition   => '/',
                    HeaderMsg       => InstancePath & PartID,
                    TimingData      => TD_BWAN_CLK,
                    XOn             => XOn,
                    MsgOn           => MsgOn,
                    Violation       => Tviol_BWAN_CLK );