INSTRUCTION FORMATS
MOTOROLA
INSTRUCTION SET INTRODUCTION
6 - 7
6.3.2.2
AGU Registers
The 24 AGU registers are 16 bits wide. They may be accessed as word operands for
address, address modifier, and data storage. When used as a source operand, these reg-
isters occupy the low-order portion of the 24-bit word; the high-order portion is read as
zeros (see Figure 6-5). When used as a destination operand, these registers receive the
low-order portion of the word; the high-order portion is not used. The notation “Rn” desig-
nates one of the eight address registers, R0–R7; the notation “Nn” designates one of the
eight address offset registers, N0–N7; and the notation “Mn” designates one of the eight
Figure 6-4 Reading and Writing the ALU Extension Registers
23
8 7
0
23
8 7
0
23
8 7
0
BUS
NOT USED
LSB OF
WORD
A2
BUS
REGISTER A2, B2 USED
AS A DESTINATION
REGISTER A2, B2
USED AS A SOURCE
SIGN EXTENSION
OF A2
CONTENTS
OF A2
NOT USED
REGISTER A2, B2
Figure 6-5 Reading and Writing the Address ALU Registers
23
0
BUS
NOT USED
23
16 15
0
BUS
ADDRESS ALU
ADDRESS ALU REGISTERS
AS A DESTINATION
AS A SOURCE
ADDRESS ALU REGISTERS
15
0
ZERO FILL
REGISTERS
LSB OF
WORD
Summary of Contents for DSP56K
Page 12: ...xii LIST of TABLES MOTOROLA List of Tables Continued Table Page Number Title Number ...
Page 13: ...MOTOROLA DSP56K FAMILY INTRODUCTION 1 1 SECTION 1 DSP56K FAMILY INTRODUCTION ...
Page 31: ...MOTOROLA DATA ARITHMETIC LOGIC UNIT 3 1 SECTION 3 DATA ARITHMETIC LOGIC UNIT ...
Page 50: ...DATA ALU SUMMARY 3 20 DATA ARITHMETIC LOGIC UNIT MOTOROLA ...
Page 51: ...MOTOROLA ADDRESS GENERATION UNIT 4 1 SECTION 4 ADDRESS GENERATION UNIT ...
Page 77: ...MOTOROLA PROGRAM CONTROL UNIT 5 1 SECTION 5 PROGRAM CONTROL UNIT ...
Page 124: ...INSTRUCTION GROUPS 6 30 INSTRUCTION SET INTRODUCTION MOTOROLA ...
Page 125: ...MOTOROLA PROCESSING STATES 7 1 SECTION 7 PROCESSING STATES STOP WAIT EXCEPTION NORMAL RESET ...
Page 167: ...STOP PROCESSING STATE MOTOROLA PROCESSING STATES 7 43 ...
Page 168: ...STOP PROCESSING STATE 7 44 PROCESSING STATES MOTOROLA ...
Page 169: ...MOTOROLA PORT A 8 1 SECTION 8 PORT A ...
Page 176: ...PORT A INTERFACE 8 8 PORT A MOTOROLA ...
Page 177: ...MOTOROLA PLL CLOCK OSCILLATOR 9 1 SECTION 9 PLL CLOCK OSCILLATOR x x d Φ VCO ...
Page 191: ...10 2 ON CHIP EMULATION OnCE MOTOROLA SECTION 10 ON CHIP EMULATION OnCE ...
Page 218: ...USING THE OnCE MOTOROLA ON CHIP EMULATION OnCE 10 29 ...
Page 604: ...INSTRUCTION ENCODING A 338 INSTRUCTION SET DETAILS MOTOROLA ...
Page 605: ...MOTOROLA BENCHMARK PROGRAMS B 1 APPENDIX B BENCHMARK PROGRAMS T T T T T P1 P3 P2 P4 T T T ...
Page 609: ...BENCHMARK PROGRAMS MOTOROLA BENCHMARK PROGRAMS B 5 ...
Page 611: ...BENCHMARK PROGRAMS MOTOROLA BENCHMARK PROGRAMS B 7 ...
Page 613: ...BENCHMARK PROGRAMS MOTOROLA BENCHMARK PROGRAMS B 9 ...
Page 615: ...BENCHMARK PROGRAMS MOTOROLA BENCHMARK PROGRAMS B 11 ...