Texas Instruments TMS320C3x User Manual

Tms320c3x user’s guide

TMS320C3x

User’s Guide

Literature Number: SPRU031E

2558539-9761 revision L

July 1997

Printed on Recycled Paper

Table of contents

Document Outline

IMPORTANT NOTICE
Read This First
- About This Manual
- Notational Conventions
- Information About Cautions
- Related Documentation From Texas Instruments
- References
- If You Need Assistance
- Trademarks
Contents
Figures
Tables
Examples
Introduction
- TMS320C3x Devices
- Typical Applications
Architectural Overview
- Overview
- Central Processing Unit (CPU)
- CPU Primary Register File
- Other Registers
- Memory Organization
  - RAM, ROM, and Cache
  - Memory Addressing Modes
- Internal Bus Operation
- External Memory Interface
  - TMS320C32 16- and 32-Bit Program Memory
  - TMS320C32 8-, 16-, and 32-Bit Data Memory
- Interrupts
- Peripherals
  - Timers
  - Serial Ports
- Direct Memory Access (DMA)
- TMS320C30, TMS320C31, and TMS320C32 Differences
CPU Registers
- CPU Multiport Register File
- Other Registers
  - Program-Counter (PC) Register
  - Instruction Register (IR)
- Reserved Bits and Compatibility
Memory and the Instruction Cache
- Memory
  - Memory Maps
  - Peripheral Bus Memory Map
- Reset/Interrupt/Trap Vector Map
- Instruction Cache
Data Formats and Floating-Point Operation
- Integer Formats
  - Short-Integer Format
  - Single-Precision Integer Format
- Unsigned-Integer Formats
  - Short Unsigned-Integer Format
  - Single-Precision Unsigned-Integer Format
- Floating-Point Formats
- Floating-Point Conversion (IEEE Std. 754)
  - Converting IEEE Format to 2s-Complement TMS320C3x Floating-Point Format
    - IEEE-to-TMS320C3x Floating-Point Format Conversion
  - Converting 2s-Complement TMS320C3x Floating-Point Format to IEEE Format
    - TMS320C3x-to-IEEE Floating-Point Format Conversion
- Floating-Point Multiplication
- Floating-Point Addition and Subtraction
- Normalization Using the NORM Instruction
- Rounding (RND Instruction)
- Floating-Point to Integer Conversion (FIX Instruction)
- Integer to Floating-Point Conversion (FLOAT Instruction)
- Fast Logarithms on a Floating-Point Device
  - Example of Fast Logarithm on a Floating-Point Device
  - Points to Consider
Addressing Modes
- Addressing Types
- Register Addressing
- Direct Addressing
- Indirect Addressing
- Immediate Addressing
- PC-Relative Addressing
- Circular Addressing
- Bit-Reversed Addressing
- Aligning Buffers With the TMS320 Floating-Point DSP Assembly Language Tools
- System and User Stack Management
Program Flow Control
- Repeat Modes
- Delayed Branches
- Calls, Traps, and Returns
- Interlocked Operations
- Reset Operation
- Interrupts
- DMA Interrupts
- Traps
  - Initialization of Traps and Interrupts
  - Operation of Traps
- Power Management Modes
  - IDLE2 Power-Down Mode
  - LOPOWER
Pipeline Operation
- Pipeline Structure
- Pipeline Conflicts
- Resolving Register Conflicts
- Memory Access for Maximum Performance
- Clocking Memory Accesses
  - Program Fetches
  - Data Loads and Stores
TMS320C30 and TMS320C31 External-Memory Interface
- Overview
- Memory Interface Signals
  - TMS320C30 Memory Interface Signals
  - TMS320C31 Memory Interface Signals
- Memory Interface Control Registers
  - Primary-Bus Control Register
  - Expansion-Bus Control Register
- Programmable Wait States
- Programmable Bank Switching
- External Memory Interface Timing
TMS320C32 Enhanced External Memory Interface
- TMS320C32 Memory Features
- TMS320C32 Memory Overview
- Configuration
  - External Interface Control Registers
  - Using Physical Memory Width and Data-Type Size Fields
- Programmable Wait States
- Programmable Bank Switching
- 32-Bit-Wide Memory Interface
- 16-Bit-Wide Memory Interface
- 8-Bit-Wide Memory Interface
- External Ready Timing Improvement
- Bus Timing
Using the TMS320C31 and TMS320C32 Boot Loaders
- TMS320C31 Boot Loader
- TMS320C32 Boot Loader
Peripherals
- Timers
- Serial Ports
- DMA Controller
Assembly Language Instructions
- Instruction Set
- Instruction Set Summary
- Parallel Instruction Set Summary
- Group Addressing Mode Instruction Encoding
- Condition Codes and Flags
- Individual Instructions
Instruction Opcodes
TMS320C31 Boot Loader Source Code
TMS320C32 Boot Loader Source Code
- Boot-Loader Source Code Description
- Boot-Loader Source Code Listing
Glossary
Index