Memory Configuration
RAM Configuration
MOTOROLA
DSP56309UM/D 3-5
3.1.3
Memory Space Configuration
Memory space addressing is 24-bit by default. The DSP56309 switches to sixteen-bit
address compatibility mode by setting the sixteen-bit compatibility (SC) bit in the Status
Register (SR).
Memory maps for the different configurations are shown in
.
3.2
RAM CONFIGURATION
The DSP56309 contains 34K of RAM, divided by default into the following:
¥ Program RAM (20K)
¥ X data RAM (7K)
¥ Y data RAM (7K)
RAM configuration depends on two bits: the Cache Enable (CE) of the SR and the
Memory Select (MS) of the Operating Mode Register (OMR).
Table 3-1
Memory Space Configuration Bit Settings for the DSP56309
Bit
Abbreviation
Bit Name
Bit Location
Cleared = 0
Effect (Default)
Set = 1 Effect
SC
Sixteen-bit
Compatibility
SR 13
16M word
address space
(24-bit address)
64K word
address space
(16-bit address)
Table 3-2
RAM Configuration Bit Settings for the DSP56309
Bit
Abbreviation
Bit Name
Bit
Location
Cleared = 0 Effect
(Default)
Set = 1 Effect
CE
Cache
Enable
SR 19
Cache Disabled
Cache Enabled
1K
MS
Memory
Switch
OMR 7
Program RAM 20K
X data RAM 7K
Y data RAM 7K
Program RAM 24K
X data RAM 5K
Y data RAM 5K
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 ...
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