Texas Instruments TMS320C67X+ DSP User manual

TMS320C67x/C67x+ DSP
CPU and Instruction Set
Reference Guide
Literature Number: SPRU733
May 2005

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iiiRead This FirstSPRU733
Preface
Read This First
About This Manual
The TMS320C6000™digital signal processor (DSP) platform is part of the
TMS320™DSP family. The TMS320C62x™DSP generation and the
TMS320C64x™DSP generation comprise fixed-point devices in the
C6000™DSP platform, and the TMS320C67x™DSP generation comprises
floating-point devices in the C6000 DSP platform.
The TMS320C67x+™DSP is an enhancement of the C67x™DSP with added
functionality and an expanded instruction set. This document describes the
CPU architecture, pipeline, instruction set, and interrupts of the C67x and
C67x+™DSPs.
Notational Conventions
This document uses the following conventions.
Any reference to the C67x DSP or C67x CPU also applies, unless other-
wise noted, to the C67x+ DSP and C67x+ CPU, respectively.
Hexadecimal numbers are shown with the suffix h. For example, the
following number is 40 hexadecimal (decimal 64): 40h.
Related Documentation From Texas Instruments
The following documents describe the C6000™devices and related support
tools. Copies of these documents are available on the Internet at www.ti.com.
Tip: Enter the literature number in the search box provided at www.ti.com.
The current documentation that describes the C6000 devices, related periph-
erals, and other technical collateral, is available in the C6000 DSP product
folder at: www.ti.com/c6000.
TMS320C6000 DSP Peripherals Overview Reference Guide (literature
number SPRU190) describes the peripherals available on the
TMS320C6000 DSPs.

Trademarks
iv SPRU733Read This First
TMS320C672x DSP Peripherals Overview Reference Guide (literature
number SPRU723) describes the peripherals available on the
TMS320C672x DSPs.
TMS320C6000 Technical Brief (literature number SPRU197) gives an
introduction to the TMS320C62x and TMS320C67x DSPs, development
tools, and third-party support.
TMS320C6000 Programmer’s Guide (literature number SPRU198)
describes ways to optimize C and assembly code for the TMS320C6000
DSPs and includes application program examples.
TMS320C6000 Code Composer Studio Tutorial (literature number
SPRU301) introduces the Code Composer Studio integrated develop-
ment environment and software tools.
Code Composer Studio Application Programming Interface Reference
Guide (literature number SPRU321) describes the Code Composer
Studio application programming interface (API), which allows you to pro-
gram custom plug-ins for Code Composer.
TMS320C6x Peripheral Support Library Programmer’s Reference
(literature number SPRU273) describes the contents of the
TMS320C6000 peripheral support library of functions and macros. It lists
functions and macros both by header file and alphabetically, provides a
complete description of each, and gives code examples to show how
they are used.
TMS320C6000 Chip Support Library API Reference Guide (literature
number SPRU401) describes a set of application programming interfaces
(APIs) used to configure and control the on-chip peripherals.
Trademarks
Code Composer Studio, C6000, C64x, C67x, C67x+, TMS320C2000,
TMS320C5000, TMS320C6000, TMS320C62x, TMS320C64x,
TMS320C67x, TMS320C67x+, TMS320C672x, and VelociTI are trademarks
of Texas Instruments.
Trademarks are the property of their respective owners.
Related Documentation From Texas Instruments / Trademarks

Contents
vContentsSPRU733
Contents
1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Summarizes the features of the TMS320 family of products and presents typical applications.
Describes the TMS320C67x DSP and lists their key features.
1.1 TMS320 DSP Family Overview 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 TMS320C6000 DSP Family Overview 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 TMS320C67x DSP Features and Options 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 TMS320C67x DSP Architecture 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.1 Central Processing Unit (CPU) 1-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.2 Internal Memory 1-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.3 Memory and Peripheral Options 1-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 CPU Data Paths and Control 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provides information about the data paths and control registers. The two register files and the
data cross paths are described.
2.1 Introduction 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 General-Purpose Register Files 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Functional Units 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Register File Cross Paths 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5 Memory, Load, and Store Paths 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6 Data Address Paths 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7 Control Register File 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7.1 Register Addresses for Accessing the Control Registers 2-8. . . . . . . . . . . . . . . . . .
2.7.2 Pipeline/Timing of Control Register Accesses 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7.3 Addressing Mode Register (AMR) 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7.4 Control Status Register (CSR) 2-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7.5 Interrupt Clear Register (ICR) 2-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7.6 Interrupt Enable Register (IER) 2-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7.7 Interrupt Flag Register (IFR) 2-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7.8 Interrupt Return Pointer Register (IRP) 2-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7.9 Interrupt Set Register (ISR) 2-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7.10 Interrupt Service Table Pointer Register (ISTP) 2-21. . . . . . . . . . . . . . . . . . . . . . . . .
2.7.11 Nonmaskable Interrupt (NMI) Return Pointer Register (NRP) 2-22. . . . . . . . . . . . .
2.7.12 E1 Phase Program Counter (PCE1) 2-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.8 Control Register File Extensions 2-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.8.1 Floating-Point Adder Configuration Register (FADCR) 2-23. . . . . . . . . . . . . . . . . . .
2.8.2 Floating-Point Auxiliary Configuration Register (FAUCR) 2-27. . . . . . . . . . . . . . . . .
2.8.3 Floating-Point Multiplier Configuration Register (FMCR) 2-31. . . . . . . . . . . . . . . . .

Contents
vi SPRU733Contents
3 Instruction Set 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Describes the assembly language instructions of the TMS320C67x DSP. Also described are
parallel operations, conditional operations, resource constraints, and addressing modes.
3.1 Instruction Operation and Execution Notations 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Instruction Syntax and Opcode Notations 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Overview of IEEE Standard Single- and Double-Precision Formats 3-9. . . . . . . . . . . . . . . .
3.4 Delay Slots 3-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5 Parallel Operations 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5.1 Example Parallel Code 3-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5.2 Branching Into the Middle of an Execute Packet 3-18. . . . . . . . . . . . . . . . . . . . . . . .
3.6 Conditional Operations 3-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.7 Resource Constraints 3-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.7.1 Constraints on Instructions Using the Same Functional Unit 3-20. . . . . . . . . . . . . .
3.7.2 Constraints on the Same Functional Unit Writing in the
Same Instruction Cycle 3-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.7.3 Constraints on Cross Paths (1X and 2X) 3-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.7.4 Constraints on Loads and Stores 3-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.7.5 Constraints on Long (40-Bit) Data 3-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.7.6 Constraints on Register Reads 3-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.7.7 Constraints on Register Writes 3-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.7.8 Constraints on Floating-Point Instructions 3-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.8 Addressing Modes 3-30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.8.1 Linear Addressing Mode 3-30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.8.2 Circular Addressing Mode 3-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.8.3 Syntax for Load/Store Address Generation 3-32. . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.9 Instruction Compatibility 3-34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.10 Instruction Descriptions 3-34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ABS (Absolute Value With Saturation) 3-38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ABSDP (Absolute Value, Double-Precision Floating-Point) 3-40. . . . . . . . . . . . . . . . . . . . . .
ABSSP (Absolute Value, Single-Precision Floating-Point) 3-42. . . . . . . . . . . . . . . . . . . . . . .
ADD (Add Two Signed Integers Without Saturation) 3-44. . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADDAB (Add Using Byte Addressing Mode) 3-48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADDAD (Add Using Doubleword Addressing Mode) 3-50. . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADDAH (Add Using Halfword Addressing Mode) 3-52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADDAW (Add Using Word Addressing Mode) 3-54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADDDP (Add Two Double-Precision Floating-Point Values) 3-56. . . . . . . . . . . . . . . . . . . . .
ADDK (Add Signed 16-Bit Constant to Register) 3-59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADDSP (Add Two Single-Precision Floating-Point Values) 3-60. . . . . . . . . . . . . . . . . . . . . .
ADDU (Add Two Unsigned Integers Without Saturation) 3-63. . . . . . . . . . . . . . . . . . . . . . . .
ADD2 (Add Two 16-Bit Integers on Upper and Lower Register Halves) 3-65. . . . . . . . . . .
AND (Bitwise AND) 3-67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B (Branch Using a Displacement) 3-69. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B (Branch Using a Register) 3-71. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B IRP (Branch Using an Interrupt Return Pointer) 3-73. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B NRP (Branch Using NMI Return Pointer) 3-75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents
viiContentsSPRU733
CLR (Clear a Bit Field) 3-77. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CMPEQ (Compare for Equality, Signed Integers) 3-80. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CMPEQDP (Compare for Equality, Double-Precision Floating-Point Values) 3-82. . . . . . .
CMPEQSP (Compare for Equality, Single-Precision Floating-Point Values) 3-84. . . . . . . .
CMPGT (Compare for Greater Than, Signed Integers) 3-86. . . . . . . . . . . . . . . . . . . . . . . . . .
CMPGTDP (Compare for Greater Than, Double-Precision Floating-Point Values) 3-89. .
CMPGTSP (Compare for Greater Than, Single-Precision Floating-Point Values) 3-91. . .
CMPGTU (Compare for Greater Than, Unsigned Integers) 3-93. . . . . . . . . . . . . . . . . . . . . .
CMPLT (Compare for Less Than, Signed Integers) 3-95. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CMPLTDP (Compare for Less Than, Double-Precision Floating-Point Values) 3-98. . . . .
CMPLTSP (Compare for Less Than, Single-Precision Floating-Point Values) 3-100. . . . .
CMPLTU (Compare for Less Than, Unsigned Integers) 3-102. . . . . . . . . . . . . . . . . . . . . . . .
DPINT (Convert Double-Precision Floating-Point Value to Integer) 3-104. . . . . . . . . . . . . .
DPSP (Convert Double-Precision Floating-Point Value to
Single-Precision Floating-Point Value) 3-106. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DPTRUNC (Convert Double-Precision Floating-Point Value to
Integer With Truncation) 3-108. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EXT (Extract and Sign-Extend a Bit Field) 3-110. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EXTU (Extract and Zero-Extend a Bit Field) 3-113. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IDLE (Multicycle NOP With No Termination Until Interrupt) 3-116. . . . . . . . . . . . . . . . . . . . .
INTDP (Convert Signed Integer to Double-Precision Floating-Point Value) 3-117. . . . . . .
INTDPU (Convert Unsigned Integer to Double-Precision Floating-Point Value) 3-119. . . .
INTSP (Convert Signed Integer to Single-Precision Floating-Point Value) 3-121. . . . . . . .
INTSPU (Convert Unsigned Integer to Single-Precision Floating-Point Value) 3-122. . . . .
LDB(U) (Load Byte From Memory With a 5-Bit Unsigned Constant Offset or
Register Offset) 3-123. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LDB(U) (Load Byte From Memory With a 15-Bit Unsigned Constant Offset) 3-126. . . . . .
LDDW (Load Doubleword From Memory With an Unsigned Constant Offset or
Register Offset) 3-128. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LDH(U) (Load Halfword From Memory With a 5-Bit Unsigned Constant Offset or
Register Offset) 3-131. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LDH(U) (Load Halfword From Memory With a 15-Bit Unsigned Constant Offset) 3-134. .
LDW (Load Word From Memory With a 5-Bit Unsigned Constant Offset or
Register Offset) 3-136. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LDW (Load Word From Memory With a 15-Bit Unsigned Constant Offset) 3-139. . . . . . . .
LMBD (Leftmost Bit Detection) 3-141. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MPY (Multiply Signed 16 LSB by Signed 16 LSB) 3-143. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MPYDP (Multiply Two Double-Precision Floating-Point Values) 3-145. . . . . . . . . . . . . . . . .
MPYH (Multiply Signed 16 MSB by Signed 16 MSB) 3-147. . . . . . . . . . . . . . . . . . . . . . . . . .
MPYHL (Multiply Signed 16 MSB by Signed 16 LSB) 3-149. . . . . . . . . . . . . . . . . . . . . . . . . .
MPYHLU (Multiply Unsigned 16 MSB by Unsigned 16 LSB) 3-151. . . . . . . . . . . . . . . . . . . .
MPYHSLU (Multiply Signed 16 MSB by Unsigned 16 LSB) 3-152. . . . . . . . . . . . . . . . . . . . .
MPYHSU (Multiply Signed 16 MSB by Unsigned 16 MSB) 3-153. . . . . . . . . . . . . . . . . . . . .
MPYHU (Multiply Unsigned 16 MSB by Unsigned 16 MSB) 3-154. . . . . . . . . . . . . . . . . . . .
MPYHULS (Multiply Unsigned 16 MSB by Signed 16 LSB) 3-155. . . . . . . . . . . . . . . . . . . . .
MPYHUS (Multiply Unsigned 16 MSB by Signed 16 MSB) 3-156. . . . . . . . . . . . . . . . . . . . .

Contents
viii SPRU733Contents
MPYI (Multiply 32-Bit by 32-Bit Into 32-Bit Result) 3-157. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MPYID (Multiply 32-Bit by 32-Bit Into 64-Bit Result) 3-159. . . . . . . . . . . . . . . . . . . . . . . . . . .
MPYLH (Multiply Signed 16 LSB by Signed 16 MSB) 3-161. . . . . . . . . . . . . . . . . . . . . . . . . .
MPYLHU (Multiply Unsigned 16 LSB by Unsigned 16 MSB) 3-163. . . . . . . . . . . . . . . . . . . .
MPYLSHU (Multiply Signed 16 LSB by Unsigned 16 MSB) 3-164. . . . . . . . . . . . . . . . . . . . .
MPYLUHS (Multiply Unsigned 16 LSB by Signed 16 MSB) 3-165. . . . . . . . . . . . . . . . . . . . .
MPYSP (Multiply Two Single-Precision Floating-Point Values) 3-166. . . . . . . . . . . . . . . . . .
MPYSPDP (Multiply Single-Precision Floating-Point Value by
Double-Precision Floating-Point Value) 3-168. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MPYSP2DP (Multiply Two Single-Precision Floating-Point Values for
Double-Precision Result) 3-170. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MPYSU (Multiply Signed 16 LSB by Unsigned 16 LSB) 3-172. . . . . . . . . . . . . . . . . . . . . . . .
MPYU (Multiply Unsigned 16 LSB by Unsigned 16 LSB) 3-174. . . . . . . . . . . . . . . . . . . . . . .
MPYUS (Multiply Unsigned 16 LSB by Signed 16 LSB) 3-176. . . . . . . . . . . . . . . . . . . . . . . .
MV (Move From Register to Register) 3-178. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MVC (Move Between Control File and Register File) 3-180. . . . . . . . . . . . . . . . . . . . . . . . . .
MVK (Move Signed Constant Into Register and Sign Extend) 3-183. . . . . . . . . . . . . . . . . . .
MVKH and MVKLH (Move 16-Bit Constant Into Upper Bits of Register) 3-185. . . . . . . . . .
MVKL (Move Signed Constant Into Register and
Sign Extend—Used with MVKH) 3-187. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NEG (Negate) 3-189. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NOP (No Operation) 3-190. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NORM (Normalize Integer) 3-192. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NOT (Bitwise NOT) 3-194. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OR (Bitwise OR) 3-195. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RCPDP (Double-Precision Floating-Point Reciprocal Approximation) 3-197. . . . . . . . . . . .
RCPSP (Single-Precision Floating-Point Reciprocal Approximation) 3-199. . . . . . . . . . . . .
RSQRDP (Double-Precision Floating-Point Square-Root
Reciprocal Approximation) 3-201. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RSQRSP (Single-Precision Floating-Point Square-Root
Reciprocal Approximation) 3-203. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SADD (Add Two Signed Integers With Saturation) 3-205. . . . . . . . . . . . . . . . . . . . . . . . . . . .
SAT (Saturate a 40-Bit Integer to a 32-Bit Integer) 3-208. . . . . . . . . . . . . . . . . . . . . . . . . . . .
SET (Set a Bit Field) 3-210. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SHL (Arithmetic Shift Left) 3-213. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SHR (Arithmetic Shift Right) 3-215. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SHRU (Logical Shift Right) 3-217. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SMPY (Multiply Signed 16 LSB by Signed 16 LSB With
Left Shift and Saturation) 3-219. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SMPYH (Multiply Signed 16 MSB by Signed 16 MSB With
Left Shift and Saturation) 3-221. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SMPYHL (Multiply Signed 16 MSB by Signed 16 LSB With
Left Shift and Saturation) 3-222. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SMPYLH (Multiply Signed 16 LSB by Signed 16 MSB With
Left Shift and Saturation) 3-224. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPDP (Convert Single-Precision Floating-Point Value to
Double-Precision Floating-Point Value) 3-226. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents
ixContentsSPRU733
SPINT (Convert Single-Precision Floating-Point Value to Integer) 3-228. . . . . . . . . . . . . . .
SPTRUNC (Convert Single-Precision Floating-Point Value to
Integer With Truncation) 3-230. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SSHL (Shift Left With Saturation) 3-232. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SSUB (Subtract Two Signed Integers With Saturation) 3-234. . . . . . . . . . . . . . . . . . . . . . . . .
STB (Store Byte to Memory With a 5-Bit Unsigned Constant Offset or
Register Offset) 3-236. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STB (Store Byte to Memory With a 15-Bit Unsigned Constant Offset) 3-238. . . . . . . . . . . .
STH (Store Halfword to Memory With a 5-Bit Unsigned Constant Offset or
Register Offset) 3-240. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STH (Store Halfword to Memory With a 15-Bit Unsigned Constant Offset) 3-243. . . . . . . .
STW (Store Word to Memory With a 5-Bit Unsigned Constant Offset or
Register Offset) 3-245. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STW (Store Word to Memory With a 15-Bit Unsigned Constant Offset) 3-247. . . . . . . . . .
SUB (Subtract Two Signed Integers Without Saturation) 3-249. . . . . . . . . . . . . . . . . . . . . . .
SUBAB (Subtract Using Byte Addressing Mode) 3-253. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SUBAH (Subtract Using Halfword Addressing Mode) 3-255. . . . . . . . . . . . . . . . . . . . . . . . . .
SUBAW (Subtract Using Word Addressing Mode) 3-256. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SUBC (Subtract Conditionally and Shift—Used for Division) 3-258. . . . . . . . . . . . . . . . . . . .
SUBDP (Subtract Two Double-Precision Floating-Point Values) 3-260. . . . . . . . . . . . . . . . .
SUBSP (Subtract Two Single-Precision Floating-Point Values) 3-263. . . . . . . . . . . . . . . . . .
SUBU (Subtract Two Unsigned Integers Without Saturation) 3-266. . . . . . . . . . . . . . . . . . .
SUB2 (Subtract Two 16-Bit Integers on Upper and Lower Register Halves) 3-268. . . . . . .
XOR (Bitwise Exclusive OR) 3-270. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ZERO (Zero a Register) 3-272. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Pipeline 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Describes phases, operation, and discontinuities for the TMS320C67x CPU pipeline.
4.1 Pipeline Operation Overview 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1.1 Fetch 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1.2 Decode 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1.3 Execute 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1.4 Pipeline Operation Summary 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Pipeline Execution of Instruction Types 4-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.1 Single-Cycle Instructions 4-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.2 16 y 16-Bit Multiply Instructions 4-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.3 Store Instructions 4-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.4 Load Instructions 4-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.5 Branch Instructions 4-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.6 Two-Cycle DP Instructions 4-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.7 Four-Cycle Instructions 4-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.8 INTDP Instruction 4-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.9 DP Compare Instructions 4-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.10 ADDDP/SUBDP Instructions 4-28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents
xSPRU733Contents
4.2.11 MPYI Instruction 4-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.12 MPYID Instruction 4-30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.13 MPYDP Instruction 4-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.14 MPYSPDP Instruction 4-32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.15 MPYSP2DP Instruction 4-33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 Functional Unit Constraints 4-33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.1 .S-Unit Constraints 4-34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.2 .M-Unit Constraints 4-40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.3 .L-Unit Constraints 4-48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.4 .D-Unit Instruction Constraints 4-52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4 Performance Considerations 4-56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.1 Pipeline Operation With Multiple Execute Packets in a Fetch Packet 4-56. . . . . .
4.4.2 Multicycle NOPs 4-58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.3 Memory Considerations 4-60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Interrupts 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Describes the TMS320C67x DSP interrupts, including reset and nonmaskable interrupts
(NMI), and explains interrupt control, detection, and processing.
5.1 Overview 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.1 Types of Interrupts and Signals Used 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.2 Interrupt Service Table (IST) 5-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.3 Summary of Interrupt Control Registers 5-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 Globally Enabling and Disabling Interrupts 5-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3 Individual Interrupt Control 5-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.1 Enabling and Disabling Interrupts 5-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.2 Status of Interrupts 5-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.3 Setting and Clearing Interrupts 5-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.4 Returning From Interrupt Servicing 5-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4 Interrupt Detection and Processing 5-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4.1 Setting the Nonreset Interrupt Flag 5-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4.2 Conditions for Processing a Nonreset Interrupt 5-16. . . . . . . . . . . . . . . . . . . . . . . . .
5.4.3 Actions Taken During Nonreset Interrupt Processing 5-18. . . . . . . . . . . . . . . . . . . .
5.4.4 Setting the RESET Interrupt Flag 5-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4.5 Actions Taken During RESET Interrupt Processing 5-20. . . . . . . . . . . . . . . . . . . . . .
5.5 Performance Considerations 5-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.5.1 General Performance 5-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.5.2 Pipeline Interaction 5-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.6 Programming Considerations 5-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.6.1 Single Assignment Programming 5-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.6.2 Nested Interrupts 5-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.6.3 Manual Interrupt Processing 5-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.6.4 Traps 5-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents
xiContentsSPRU733
A Instruction Compatibility A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lists the instructions that are common to the C62x, C64x, and C67x DSPs.
B Mapping Between Instruction and Functional Unit B-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lists the instructions that execute on each functional unit.
C .D Unit Instructions and Opcode Maps C-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lists the instructions that execute in the .D functional unit and illustrates the opcode maps for
these instructions.
C.1 Instructions Executing in the .D Functional Unit C-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C.2 Opcode Map Symbols and Meanings C-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C.3 32-Bit Opcode Maps C-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D .L Unit Instructions and Opcode Maps D-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lists the instructions that execute in the .L functional unit and illustrates the opcode maps for
these instructions.
D.1 Instructions Executing in the .L Functional Unit D-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D.2 Opcode Map Symbols and Meanings D-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D.3 32-Bit Opcode Maps D-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E .M Unit Instructions and Opcode Maps E-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lists the instructions that execute in the .M functional unit and illustrates the opcode maps for
these instructions.
E.1 Instructions Executing in the .M Functional Unit E-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E.2 Opcode Map Symbols and Meanings E-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E.3 32-Bit Opcode Maps E-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F .S Unit Instructions and Opcode Maps F-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lists the instructions that execute in the .S functional unit and illustrates the opcode maps for
these instructions.
F.1 Instructions Executing in the .S Functional Unit F-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F.2 Opcode Map Symbols and Meanings F-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F.3 32-Bit Opcode Maps F-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G No Unit Specified Instructions and Opcode Maps G-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lists the instructions that execute with no unit specified and illustrates the opcode maps for
these instructions.
G.1 Instructions Executing With No Unit Specified G-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G.2 Opcode Map Symbols and Meanings G-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G.3 32-Bit Opcode Maps G-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figures
xii SPRU733Figures
Figures
1−1 TMS320C67x DSP Block Diagram 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−1 TMS320C67x CPU Data Paths 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−2 Storage Scheme for 40-Bit Data in a Register Pair 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−3 Addressing Mode Register (AMR) 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−4 Control Status Register (CSR) 2-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−5 PWRD Field of Control Status Register (CSR) 2-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−6 Interrupt Clear Register (ICR) 2-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−7 Interrupt Enable Register (IER) 2-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−8 Interrupt Flag Register (IFR) 2-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−9 Interrupt Return Pointer Register (IRP) 2-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−10 Interrupt Set Register (ISR) 2-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−11 Interrupt Service Table Pointer Register (ISTP) 2-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−12 NMI Return Pointer Register (NRP) 2-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−13 E1 Phase Program Counter (PCE1) 2-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−14 Floating-Point Adder Configuration Register (FADCR) 2-24. . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−15 Floating-Point Auxiliary Configuration Register (FAUCR) 2-27. . . . . . . . . . . . . . . . . . . . . . . . . .
2−16 Floating-Point Multiplier Configuration Register (FMCR) 2-31. . . . . . . . . . . . . . . . . . . . . . . . . . .
3−1 Single-Precision Floating-Point Fields 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−2 Double-Precision Floating-Point Fields 3-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−3 Basic Format of a Fetch Packet 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−4 Examples of the Detectability of Write Conflicts by the Assembler 3-25. . . . . . . . . . . . . . . . . .
4−1 Pipeline Stages 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−2 Fetch Phases of the Pipeline 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−3 Decode Phases of the Pipeline 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−4 Execute Phases of the Pipeline 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−5 Pipeline Phases 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−6 Pipeline Operation: One Execute Packet per Fetch Packet 4-6. . . . . . . . . . . . . . . . . . . . . . . . .
4−7 Pipeline Phases Block Diagram 4-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−8 Single-Cycle Instruction Phases 4-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−9 Single-Cycle Instruction Execution Block Diagram 4-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−10 Multiply Instruction Phases 4-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−11 Multiply Instruction Execution Block Diagram 4-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−12 Store Instruction Phases 4-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−13 Store Instruction Execution Block Diagram 4-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−14 Load Instruction Phases 4-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−15 Load Instruction Execution Block Diagram 4-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−16 Branch Instruction Phases 4-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−17 Branch Instruction Execution Block Diagram 4-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figures
xiiiFiguresSPRU733
4−18 Two-Cycle DP Instruction Phases 4-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−19 Four-Cycle Instruction Phases 4-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−20 INTDP Instruction Phases 4-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−21 DP Compare Instruction Phases 4-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−22 ADDDP/SUBDP Instruction Phases 4-28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−23 MPYI Instruction Phases 4-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−24 MPYID Instruction Phases 4-30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−25 MPYDP Instruction Phases 4-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−26 MPYSPDP Instruction Phases 4-32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−27 MPYSP2DP Instruction Phases 4-33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−28 Pipeline Operation: Fetch Packets With Different Numbers of Execute Packets 4-57. . . . . . .
4−29 Multicycle NOP in an Execute Packet 4-58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−30 Branching and Multicycle NOPs 4-59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−31 Pipeline Phases Used During Memory Accesses 4-60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−32 Program and Data Memory Stalls 4-61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−33 8-Bank Interleaved Memory 4-62. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−34 8-Bank Interleaved Memory With Two Memory Spaces 4-63. . . . . . . . . . . . . . . . . . . . . . . . . . .
5−1 Interrupt Service Table 5-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5−2 Interrupt Service Fetch Packet 5-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5−3 Interrupt Service Table With Branch to Additional Interrupt Service Code
Located Outside the IST 5-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5−4 Nonreset Interrupt Detection and Processing: Pipeline Operation 5-17. . . . . . . . . . . . . . . . . . .
5−5 RESET Interrupt Detection and Processing: Pipeline Operation 5-19. . . . . . . . . . . . . . . . . . . .
C−1 1 or 2 Sources Instruction Format C-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C−2 Extended .D Unit 1 or 2 Sources Instruction Format C-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C−3 Load/Store Basic Operations C-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C−4 Load/Store Long-Immediate Operations C-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D−1 1 or 2 Sources Instruction Format D-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D−2 1 or 2 Sources, Nonconditional Instruction Format D-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D−3 Unary Instruction Format D-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E−1 Extended M-Unit with Compound Operations E-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E−2 Extended .M Unit 1 or 2 Sources, Nonconditional Instruction Format E-4. . . . . . . . . . . . . . . . .
E−3 Extended .M-Unit Unary Instruction Format E-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F−1 1 or 2 Sources Instruction Format F-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F−2 Extended .S Unit 1 or 2 Sources Instruction Format F-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F−3 Extended .S Unit 1 or 2 Sources, Nonconditional Instruction Format F-4. . . . . . . . . . . . . . . . .
F−4 Unary Instruction Format F-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F−5 Extended .S Unit Branch Conditional, Immediate Instruction Format F-4. . . . . . . . . . . . . . . . .
F−6 Call Unconditional, Immediate with Implied NOP 5 Instruction Format F-5. . . . . . . . . . . . . . . .
F−7 Branch with NOP Constant Instruction Format F-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F−8 Branch with NOP Register Instruction Format F-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F−9 Branch Instruction Format F-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F−10 MVK Instruction Format F-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F−11 Field Operations F-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G−1 Loop Buffer Instruction Format G-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G−2 NOP and IDLE Instruction Format G-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G−3 Emulation/Control Instruction Format G-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tables
xiv SPRU733Tables
Tables
1−1 Typical Applications for the TMS320 DSPs 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−1 40-Bit/64-Bit Register Pairs 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−2 Functional Units and Operations Performed 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−3 Control Registers 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−4 Register Addresses for Accessing the Control Registers 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . .
2−5 Addressing Mode Register (AMR) Field Descriptions 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−6 Block Size Calculations 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−7 Control Status Register (CSR) Field Descriptions 2-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−8 Interrupt Clear Register (ICR) Field Descriptions 2-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−9 Interrupt Enable Register (IER) Field Descriptions 2-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−10 Interrupt Flag Register (IFR) Field Descriptions 2-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−11 Interrupt Set Register (ISR) Field Descriptions 2-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−12 Interrupt Service Table Pointer Register (ISTP) Field Descriptions 2-21. . . . . . . . . . . . . . . . . .
2−13 Control Register File Extensions 2-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2−14 Floating-Point Adder Configuration Register (FADCR) Field Descriptions 2-24. . . . . . . . . . . .
2−15 Floating-Point Auxiliary Configuration Register (FAUCR) Field Descriptions 2-27. . . . . . . . . .
2−16 Floating-Point Multiplier Configuration Register (FMCR) Field Descriptions 2-31. . . . . . . . . .
3−1 Instruction Operation and Execution Notations 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−2 Instruction Syntax and Opcode Notations 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−3 IEEE Floating-Point Notations 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−4 Special Single-Precision Values 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−5 Hexadecimal and Decimal Representation for Selected Single-Precision Values 3-12. . . . . .
3−6 Special Double-Precision Values 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−7 Hexadecimal and Decimal Representation for Selected Double-Precision Values 3-13. . . . .
3−8 Delay Slot and Functional Unit Latency 3-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−9 Registers That Can Be Tested by Conditional Operations 3-19. . . . . . . . . . . . . . . . . . . . . . . . .
3−10 Indirect Address Generation for Load/Store 3-33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−11 Address Generator Options for Load/Store 3-33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−12 Relationships Between Operands, Operand Size, Signed/Unsigned,
Functional Units, and Opfields for Example Instruction (ADD) 3-36. . . . . . . . . . . . . . . . . . . . . .
3−13 Program Counter Values for Example Branch Using a Displacement 3-70. . . . . . . . . . . . . . . .
3−14 Program Counter Values for Example Branch Using a Register 3-72. . . . . . . . . . . . . . . . . . . .
3−15 Program Counter Values for B IRP Instruction 3-74. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−16 Program Counter Values for B NRP Instruction 3-76. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−17 Data Types Supported by LDB(U) Instruction 3-123. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−18 Data Types Supported by LDB(U) Instruction (15-Bit Offset) 3-126. . . . . . . . . . . . . . . . . . . . . .

Tables
xvTablesSPRU733
3−19 Data Types Supported by LDH(U) Instruction 3-131. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−20 Data Types Supported by LDH(U) Instruction (15-Bit Offset) 3-135. . . . . . . . . . . . . . . . . . . . . .
3−21 Register Addresses for Accessing the Control Registers 3-182. . . . . . . . . . . . . . . . . . . . . . . . .
4−1 Operations Occurring During Pipeline Phases 4-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−2 Execution Stage Length Description for Each Instruction Type 4-12. . . . . . . . . . . . . . . . . . . . .
4−3 Single-Cycle Instruction Execution 4-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−416×16-Bit Multiply Instruction Execution 4-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−5 Store Instruction Execution 4-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−6 Load Instruction Execution 4-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−7 Branch Instruction Execution 4-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−8 Two-Cycle DP Instruction Execution 4-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−9 Four-Cycle Instruction Execution 4-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−10 INTDP Instruction Execution 4-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−11 DP Compare Instruction Execution 4-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−12 ADDDP/SUBDP Instruction Execution 4-28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−13 MPYI Instruction Execution 4-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−14 MPYID Instruction Execution 4-30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−15 MPYDP Instruction Execution 4-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−16 MPYSPDP Instruction Execution 4-32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−17 MPYSP2DP Instruction Execution 4-33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−18 Single-Cycle .S-Unit Instruction Constraints 4-34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−19 DP Compare .S-Unit Instruction Constraints 4-35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−20 2-Cycle DP .S-Unit Instruction Constraints 4-36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−21 ADDSP/SUBSP .S-Unit Instruction Constraints 4-37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−22 ADDDP/SUBDP .S-Unit Instruction Constraints 4-38
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−23 Branch .S-Unit Instruction Constraints 4-39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−24 16 ×16 Multiply .M-Unit Instruction Constraints 4-40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−25 4-Cycle .M-Unit Instruction Constraints 4-41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−26 MPYI .M-Unit Instruction Constraints 4-42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−27 MPYID .M-Unit Instruction Constraints 4-43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−28 MPYDP .M-Unit Instruction Constraints 4-44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−29 MPYSP .M-Unit Instruction Constraints 4-45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−30 MPYSPDP .M-Unit Instruction Constraints 4-46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−31 MPYSP2DP .M-Unit Instruction Constraints 4-47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−32 Single-Cycle .L-Unit Instruction Constraints 4-48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−33 4-Cycle .L-Unit Instruction Constraints 4-49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−34 INTDP .L-Unit Instruction Constraints 4-50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−35 ADDDP/SUBDP .L-Unit Instruction Constraints 4-51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−36 Load .D-Unit Instruction Constraints 4-52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−37 Store .D-Unit Instruction Constraints 4-53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−38 Single-Cycle .D-Unit Instruction Constraints 4-54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−39 LDDW Instruction With Long Write Instruction Constraints 4-55. . . . . . . . . . . . . . . . . . . . . . . . .
4−40 Program Memory Accesses Versus Data Load Accesses 4-60. . . . . . . . . . . . . . . . . . . . . . . . . .
4−41 Loads in Pipeline from Example 4−2 4-63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tables
xvi SPRU733Tables
5−1 Interrupt Priorities 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5−2 Interrupt Control Registers 5-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A−1 Instruction Compatibility Between C62x, C64x, C67x, and C67x+ DSPs A-1. . . . . . . . . . . . . .
B−1 Functional Unit to Instruction Mapping B-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C−1 Instructions Executing in the .D Functional Unit C-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C−2 .D Unit Opcode Map Symbol Definitions C-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C−3 Address Generator Options for Load/Store C-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D−1 Instructions Executing in the .L Functional Unit D-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D−2 .L Unit Opcode Map Symbol Definitions D-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E−1 Instructions Executing in the .M Functional Unit E-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E−2 .M Unit Opcode Map Symbol Definitions E-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F−1 Instructions Executing in the .S Functional Unit F-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F−2 .S Unit Opcode Map Symbol Definitions F-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G−1 Instructions Executing With No Unit Specified G-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G−2 No Unit Specified Instructions Opcode Map Symbol Definitions G-2. . . . . . . . . . . . . . . . . . . . .

Examples
xviiExamplesSPRU733
Examples
3−1 Fully Serial p-Bit Pattern in a Fetch Packet 3-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−2 Fully Parallel p-Bit Pattern in a Fetch Packet 3-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−3 Partially Serial p-Bit Pattern in a Fetch Packet 3-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−4 LDW Instruction in Circular Mode 3-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3−5 ADDAH Instruction in Circular Mode 3-32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−1 Execute Packet in Figure 4−7 4-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4−2 Load From Memory Banks 4-62. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5−1 Relocation of Interrupt Service Table 5-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5−2 Code Sequence to Disable Maskable Interrupts Globally 5-12. . . . . . . . . . . . . . . . . . . . . . . . . .
5−3 Code Sequence to Enable Maskable Interrupts Globally 5-12. . . . . . . . . . . . . . . . . . . . . . . . . .
5−4 Code Sequence to Enable an Individual Interrupt (INT9) 5-13. . . . . . . . . . . . . . . . . . . . . . . . . .
5−5 Code Sequence to Disable an Individual Interrupt (INT9) 5-13. . . . . . . . . . . . . . . . . . . . . . . . . .
5−6 Code to Set an Individual Interrupt (INT6) and Read the Flag Register 5-14. . . . . . . . . . . . . .
5−7 Code to Clear an Individual Interrupt (INT6) and Read the Flag Register 5-14. . . . . . . . . . . .
5−8 Code to Return From NMI 5-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5−9 Code to Return from a Maskable Interrupt 5-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5−10 Code Without Single Assignment: Multiple Assignment of A1 5-22. . . . . . . . . . . . . . . . . . . . . .
5−11 Code Using Single Assignment 5-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5−12 Assembly Interrupt Service Routine That Allows Nested Interrupts 5-24. . . . . . . . . . . . . . . . . .
5−13 C Interrupt Service Routine That Allows Nested Interrupts 5-25. . . . . . . . . . . . . . . . . . . . . . . . .
5−14 Manual Interrupt Processing 5-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5−15 Code Sequence to Invoke a Trap 5-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5−16 Code Sequence for Trap Return 5-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1IntroductionSPRU733
a
Introduction
The TMS320C6000™digital signal processor (DSP) platform is part of the
TMS320™DSP family. The TMS320C62x™DSP generation and the
TMS320C64x™DSP generation comprise fixed-point devices in the C6000™
DSP platform, and the TMS320C67x™DSP generation comprises floating-
point devices in the C6000 DSP platform. All three DSP generations use the
VelociTI™architecture, a high-performance, advanced very long instruction
word (VLIW) architecture, making these DSPs excellent choices for multi-
channel and multifunction applications.
The TMS320C67x+ DSP is an enhancement of the C67x DSP with added
functionality and an expanded instruction set.
Any reference to the C67x DSP or C67x CPU also applies, unless otherwise
noted, to the C67x+ DSP and C67x+ CPU, respectively.
Topic Page
1.1 TMS320 DSP Family Overview 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 TMS320C6000 DSP Family Overview 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 TMS320C67x DSP Features and Options 1-4. . . . . . . . . . . . . . . . . . . . . . . .
1.4 TMS320C67x DSP Architecture 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1

TMS320 DSP Family Overview
Introduction1-2 SPRU733
1.1 TMS320 DSP Family Overview
The TMS320™DSP family consists of fixed-point, floating-point, and multipro-
cessor digital signal processors (DSPs). TMS320™DSPs have an architec-
ture designed specifically for real-time signal processing.
Table 1−1 lists some typical applications for the TMS320™family of DSPs. The
TMS320™DSPs offer adaptable approaches to traditional signal-processing
problems. They also support complex applications that often require multiple
operations to be performed simultaneously.
1.2 TMS320C6000 DSP Family Overview
With a performance of up to 6000 million instructions per second (MIPS) and
an efficient C compiler, the TMS320C6000 DSPs give system architects
unlimited possibilities to differentiate their products. High performance, ease
of use, and affordable pricing make the C6000 generation the ideal solution
for multichannel, multifunction applications, such as:
Pooled modems
Wireless local loop base stations
Remote access servers (RAS)
Digital subscriber loop (DSL) systems
Cable modems
Multichannel telephony systems
The C6000 generation is also an ideal solution for exciting new applications;
for example:
Personalized home security with face and hand/fingerprint recognition
Advanced cruise control with global positioning systems (GPS) navigation
and accident avoidance
Remote medical diagnostics
Beam-forming base stations
Virtual reality 3-D graphics
Speech recognition
Audio
Radar
Atmospheric modeling
Finite element analysis
Imaging (examples: fingerprint recognition, ultrasound, and MRI)
TMS320 DSP Family Overview / TMS320C6000 DSP Family Overview

TMS320C6000 DSP Family Overview
1-3IntroductionSPRU733
Table 1−1. Typical Applications for the TMS320 DSPs
Automotive Consumer Control
Adaptive ride control
Antiskid brakes
Cellular telephones
Digital radios
Engine control
Global positioning
Navigation
Vibration analysis
Voice commands
Digital radios/TVs
Educational toys
Music synthesizers
Pagers
Power tools
Radar detectors
Solid-state answering machines
Disk drive control
Engine control
Laser printer control
Motor control
Robotics control
Servo control
General-Purpose Graphics/Imaging Industrial
Adaptive filtering
Convolution
Correlation
Digital filtering
Fast Fourier transforms
Hilbert transforms
Waveform generation
Windowing
3-D transformations
Animation/digital maps
Homomorphic processing
Image compression/transmission
Image enhancement
Pattern recognition
Robot vision
Workstations
Numeric control
Power-line monitoring
Robotics
Security access
Instrumentation Medical Military
Digital filtering
Function generation
Pattern matching
Phase-locked loops
Seismic processing
Spectrum analysis
Transient analysis
Diagnostic equipment
Fetal monitoring
Hearing aids
Patient monitoring
Prosthetics
Ultrasound equipment
Image processing
Missile guidance
Navigation
Radar processing
Radio frequency modems
Secure communications
Sonar processing
Telecommunications Voice/Speech
1200- to 56600-bps modems
Adaptive equalizers
ADPCM transcoders
Base stations
Cellular telephones
Channel multiplexing
Data encryption
Digital PBXs
Digital speech interpolation (DSI)
DTMF encoding/decoding
Echo cancellation
Faxing
Future terminals
Line repeaters
Personal communications
systems (PCS)
Personal digital assistants (PDA)
Speaker phones
Spread spectrum communications
Digital subscriber loop (xDSL)
Video conferencing
X.25 packet switching
Speaker verification
Speech enhancement
Speech recognition
Speech synthesis
Speech vocoding
Text-to-speech
Voice mail