params.v

ddr_sdram控制器的vhdl代码,里面的地址和数据长度可配置,能满足不同用户的需要.

/******************************************************************************
*
*  LOGIC CORE:          SDRAM Controller - Global Constants							
*  MODULE NAME:         params()
*  COMPANY:             Northwest Logic Design, Inc.
*                       www.nwlogic.com	
*
*  REVISION HISTORY:  
*
*    Revision 1.0  05/12/2000
*    Description: Initial Release.
*
*
*  FUNCTIONAL DESCRIPTION:
*
*  This file defines a number of global constants used throughout
*  the SDRAM Controller.
*  Copyright Northwest Logic Design, Inc., 2000.  All rights reserved.
******************************************************************************/


// Address Space Parameters

`define ROWSTART        8           
`define ROWSIZE         12
`define COLSTART        0
`define COLSIZE         8
`define BANKSTART       19
`define BANKSIZE        2

// Address and Data Bus Sizes

`define ASIZE           22      // total address width of the SDRAM
`define DSIZE         128       // Width of data bus to SDRAMS