//###########################################################################
//
// FILE:   DSP281x_Xintf.h
//
// TITLE:  DSP281x Device External Interface Register Definitions.
//
//###########################################################################
//
//  Ver | dd mmm yyyy | Who  | Description of changes
// =====|=============|======|===============================================
//  1.00| 11 Sep 2003 | L.H. | No change since previous version (v.58 Alpha)
//###########################################################################

#ifndef DSP281x_XINTF_H
#define DSP281x_XINTF_H


#ifdef __cplusplus
extern "C" {
#endif


// XINTF timing register bit definitions:
struct XTIMING_BITS {    // bits  description
   Uint16 XWRTRAIL:2;    // 1:0   Write access trail timing
   Uint16 XWRACTIVE:3;   // 4:2   Write access active timing
   Uint16 XWRLEAD:2;     // 6:5   Write access lead timing
   Uint16 XRDTRAIL:2;    // 8:7   Read access trail timing
   Uint16 XRDACTIVE:3;   // 11:9  Read access active timing
   Uint16 XRDLEAD:2;     // 13:12 Read access lead timing
   Uint16 USEREADY:1;    // 14    Extend access using HW waitstates
   Uint16 READYMODE:1;   // 15    Ready mode
   Uint16 XSIZE:2;       // 17:16 XINTF bus width - must be written as 11b
   Uint16 rsvd1:4;       // 21:18 reserved
   Uint16 X2TIMING:1;    // 22    Double lead/active/trail timing
   Uint16 rsvd3:9;       // 31:23 reserved
};

union XTIMING_REG {
   Uint32               all;
   struct XTIMING_BITS  bit;
};

// XINTF control register bit definitions:
struct XINTCNF2_BITS {    // bits  description
   Uint16 WRBUFF:2;       // 1:0   Write buffer depth
   Uint16 CLKMODE:1;      // 2     Ratio for XCLKOUT with respect to XTIMCLK
   Uint16 CLKOFF:1;       // 3     Disable XCLKOUT
   Uint16 rsvd1:2;        // 5:4   reserved
   Uint16 WLEVEL:2;       // 7:6   Current level of the write buffer
   Uint16 MPNMC:1;        // 8     Micro-processor/micro-computer mode
   Uint16 HOLD:1;         // 9     Hold enable/disable
   Uint16 HOLDS:1;        // 10    Current state of HOLDn input
   Uint16 HOLDAS:1;       // 11    Current state of HOLDAn output
   Uint16 rsvd2:4;        // 15:12 reserved
   Uint16 XTIMCLK:3;      // 18:16 Ratio for XTIMCLK
   Uint16 rsvd3:13;       // 31:19 reserved
};

union XINTCNF2_REG {
   Uint32                all;
   struct XINTCNF2_BITS  bit;
};

// XINTF bank switching register bit definitions:
struct XBANK_BITS {      // bits  description
   Uint16  BANK:2;       // 2:0   Zone for which banking is enabled
   Uint16  BCYC:3;       // 5:3   XTIMCLK cycles to add
   Uint16  rsvd:10;      // 15:6  reserved
};

union XBANK_REG {
   Uint16             all;
   struct XBANK_BITS  bit;
};


//---------------------------------------------------------------------------
// XINTF Register File:
//
struct XINTF_REGS {
   union XTIMING_REG XTIMING0;
   union XTIMING_REG XTIMING1;
   union XTIMING_REG XTIMING2;
   Uint32  rsvd1[3];
   union XTIMING_REG XTIMING6;
   union XTIMING_REG XTIMING7;
   Uint32  rsvd2[2];
   union XINTCNF2_REG XINTCNF2;
   Uint32  rsvd3;
   union XBANK_REG    XBANK;
   Uint16  rsvd4;
   Uint16  XREVISION;
   Uint16  rsvd5[5];
};

//---------------------------------------------------------------------------
// XINTF External References & Function Declarations:
//
extern volatile struct XINTF_REGS XintfRegs;


#ifdef __cplusplus
}
#endif /* extern "C" */

#endif  // end of DSP281x_XINTF_H definition

//===========================================================================
// No more.
//===========================================================================