--------------------------------------------------------------------------------
--
--  P H I L I P S  C O M P A N Y  R E S T R I C T E D
--                                         
--  Copyright (c) 1998.                    
--
--  Philips Electronics N.V.
--
--  Philips Semiconductors
--  Interconnectivity and Processor Peripheral group
--  Bangalore,India
--  All rights reserved. Reproduction in whole or in part is prohibited
--  without the written permission of the copyright owner.
--
--------------------------------------------------------------------------------
--
--  File            : usb_new_pvci_eng_ent.vhdl 
--
--  Module          : PVCI_ENG_ENT 
--
--  Project         : VPB bus Interface to USB 1.1 Device(USBFS22)
--
--  Author          :              
--
--  Description     : The ent of PVCI_ENG block
--
--  Status          : 
--
--  Contact address : 
--
--------------------------------------------------------------------------------

library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;

library work;
use work.PCK_GENERAL.all;
use work.PCK_HANDLERS.all;
use work.PCK_CONFIGURATION.all;

library work;
use work.PCK_APB.all;

entity PVCI_ENG is
   port(
       -- Interface to EP_HANDLER modlue

       Trans_Enable:          in   one_bit;              -- Data transfer enable
       Read:                  in   one_bit;              -- '1' read data
       EP_number:             in   Int_EndPointType;     -- Physical endpoint number
       Data_Out:              in   byte;                 -- Data bus for OUT endpoints
       End_Transfer:          in   one_bit;              -- End of transfer for packet data 
       EndTransfer_Cmd:       in   one_bit;              -- End of transfer for command data
       USBEp0Intr_Set:        in   one_bit;              -- USB Ep0 interrupt
       USBEp1Intr_Set:        in   one_bit;              -- USB Ep1 interrupt
       USBEp2Intr_Set:        in   one_bit;              -- USB Ep2 interrupt
       USBEp3Intr_Set:        in   one_bit;              -- USB Ep3 interrupt
       USBEp4Intr_Set:        in   one_bit;              -- USB Ep4 interrupt
       USBEp5Intr_Set:        in   one_bit;              -- USB Ep5 interrupt
       USBEp6Intr_Set:        in   one_bit;              -- USB Ep6 interrupt
       USBEp7Intr_Set:        in   one_bit;              -- USB Ep7 interrupt
       USBDevIntr_Set:        in   one_bit;              -- USB Dev interrupt       
       USBToggleBuffer:       in   T_ToggleArray;        -- USB buffer toggle 
       UCToggleBuffer:        in   T_ToggleArray;        -- UC buffer toggle
       FullBuffer_UC:         in   T_Full;               -- Buffer full for endpoints
       PI_IsoToggle:          in   integer range 0 to 1; -- ISO buffer toggle
       RxError:               in   boolean;              -- Error in packet transfer
       reg_ram_read:          in   one_bit;              -- Start of IN transfer
       reg_ram_tag:           in   Int_EndPointType;     -- Physical endpoint number
       CommandData:           in   byte;                 -- Command data
       CmdDataValid:          in   boolean;              -- Command data valid
       CmdAccept:             in   boolean;              -- Handshake signal for Command accepted
       CommandCodeChannel:    out  eleven_bits;          -- Command code
       CmdCodeValid_Out:      out  boolean;              -- Command code valid
       If_Busy:               out  boolean;              -- Interface busy
       Read_Req:              out  one_bit;              -- ????
       Data_In:               out  byte;                 -- Data bus for IN data
       TxDest_NData:          out  nine_bits;            -- Number of bytes for IN packet
       Rx_N_data:             in   integer range 0 to MAX_OVERFLOW_SIZE; -- Packet size
       -- Interface to RAM module

       RxRAM_DQ_In:           in   four_bytes;           -- RAM data in-bus (32-bits)
       RxRAM_E_N:             out  one_bit;              -- RAM enable, active low
       RxRAM_W_N:             out  one_bit;              -- RAM write, active low
       RxRAM_G_N:             out  one_bit;              -- RAM grant(read), active low
       RxRAM_A:               out  RxRAMAddr_bits;       -- RAM address bus (??-bits)
       RxRAM_DQ_Out:          out  four_bytes;           -- RAM data out-bus(32-bits)
       
       -- Interface to TRNSMT_RAM module

       TxRAM_E_N:             out  one_bit;              -- RAM enable, active low
       TxRAM_W_N:             out  one_bit;              -- RAM write, active low
       TxRAM_G_N:             out  one_bit;              -- RAM grant(read), active low
       TxRAM_A:               out  TxRAMAddr_bits;       -- RAM address bus
       TxRAM_DQ_In:           in   four_bytes;           -- RAM data in-bus
       TxRAM_DQ_Out:          out  four_bytes;           -- RAM data out-bus
       
       -- Interrupt signals

       Intr_Request_Irq:      out one_bit;               -- Irq Interrupt request to processor
       Intr_Request_Fiq:      out one_bit;               -- Fiq Interrupt request to processor
       
       -- Interface to APB_WRAPPER module
                     
       clk:                   in  one_bit;               -- PVCI clock
       pvci_reset_n:          in  one_bit;               -- Reset
       req:                   in  one_bit;               -- Request
       address:               in  byte;                  -- Address
       rnw:                   in  one_bit;               -- '0' write, '1' read
       w_data:                in  four_bytes;            -- Write data
       gnt:                   out one_bit;               -- Grant
       r_data:                out four_bytes;            -- Read data
       error:                 out one_bit                -- Error 
      );
end PVCI_ENG;