3-4
DSP56309UM/D MOTOROLA
Memory Configuration
Memory Spaces
DSP56309 to feed two operands to the Data ALU simultaneously, enabling it to perform
a multiply-accumulate operation in one clock cycle.
X and Y data memory are identical in structure and functionality except for the upper
128 words of each space. The upper 128 words of X data memory are reserved for
internal I/O. We recommend that the programmer reserve the upper 128 words of Y
data memory for external I/O. (For further information, see
Section 3.1.2.2 Y Data Memory Space
X and Y data memory space each consist of the following:
¥ Internal data memory (X data RAM and Y data RAM, the default size of each is
7K, but they can be switched to 5K each)
¥ (Optionally) Off-chip memory expansion (up to 16 M in the 24-bit address mode
and 64K in the 16-bit address mode)
3.1.2.1
X Data Memory Space
The on-chip peripheral registers and some of the DSP56309 core registers occupy the top
128 locations of X data memory ($FFFF80Ð$FFFFFF in the 24-bit Address mode or
$FF80Ð$FFFF in the 16-bit Address mode). This area is called X-I/O space, and it can be
accessed by MOVE and MOVEP instructions and by bit oriented instructions (BCHG,
BCLR, BSET, BTST, BRCLR, BRSET, BSCLR, BSSET, JCLR, JSET, JSCLR, and JSSET). For
a listing of the contents of this area, see the programming sheets in
Appendix DÑProgramming Reference
The X memory space at locations $FF0000 to $FFEFFF is reserved and should not be
accessed by the programmer.
3.1.2.2
Y Data Memory Space
The off-chip peripheral registers should be mapped into the top 128 locations of Y data
memory ($FFFF80Ð$FFFFFF in the 24-bit address mode or $FF80Ð$FFFF in the 16-bit
address mode) to take advantage of the move peripheral data (MOVEP) instruction and
the bit oriented instructions (BCHG, BCLR, BSET, BTST, BRCLR, BRSET, BSCLR, BSSET,
JCLR, JSET, JSCLR, and JSSET).
The Y memory space at locations $FF0000 to $FFEFFF is reserved and should not be
accessed by the programmer.
Содержание DSP56309
Страница 25: ...xxii DSP56309UM D MOTOROLA Figure D 25 Port E Registers PCRE PRRE PDRE D 39 ...
Страница 30: ...MOTOROLA DSP56309UM D 1 1 SECTION 1 DSP56309 OVERVIEW ...
Страница 47: ...1 18 DSP56309UM D MOTOROLA DSP56309 Overview DSP56309 Architecture Overview ...
Страница 48: ...MOTOROLA DSP56309UM D 2 1 SECTION 2 SIGNAL CONNECTION DESCRIPTIONS ...
Страница 85: ...2 38 DSP56309UM D MOTOROLA Signal Connection Descriptions OnCE JTAG Interface ...
Страница 86: ...MOTOROLA DSP56309UM D 3 1 SECTION 3 MEMORY CONFIGURATION ...
Страница 104: ...MOTOROLA DSP56309UM D 4 1 SECTION 4 CORE CONFIGURATION ...
Страница 124: ...MOTOROLA DSP56309UM D 5 1 SECTION 5 GENERAL PURPOSE I O ...
Страница 125: ...5 2 DSP56309UM D MOTOROLA General Purpose I O 5 1 INTRODUCTION 5 3 5 2 PROGRAMMING MODEL 5 3 ...
Страница 128: ...MOTOROLA DSP56309UM D 6 1 SECTION 6 HOST INTERFACE HI08 ...
Страница 166: ...MOTOROLA DSP56309UM D 7 1 SECTION 7 ENHANCED SYNCHRONOUS SERIAL INTERFACE ESSI ...
Страница 212: ...MOTOROLA DSP56309UM D 8 1 SECTION 8 SERIAL COMMUNICATION INTERFACE SCI ...
Страница 241: ...8 30 DSP56309UM D MOTOROLA Serial Communication Interface SCI GPIO Signals and Registers ...
Страница 242: ...MOTOROLA DSP56309UM D 9 1 SECTION 9 TRIPLE TIMER MODULE ...
Страница 269: ...9 28 DSP56309UM D MOTOROLA Triple Timer Module Timer Operational Modes ...
Страница 270: ...MOTOROLA DSP56309UM D 10 1 SECTION 10 ON CHIP EMULATION MODULE ...
Страница 302: ...MOTOROLA DSP56309UM D 11 1 SECTION 11 JTAG PORT ...
Страница 369: ...C 22 DSP56309UM D MOTOROLA DSP56309 BSDL Listing ...
Страница 370: ...MOTOROLA DSP56309UM D D 1 APPENDIX D PROGRAMMING REFERENCE ...
Страница 405: ......
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