TMS320C31 (NRND)

Digital Signal Processor

Not Recommended for New Designs (NRND)

Replaced By TMS320C6748 – The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.  

TI does not recommend using this part in a new design. This product continues to be in production to support existing customers.

Description

The TMS320C31 and TMS320LC31 DSPs are 32-bit, floating-point processors manufactured in 0.6 um triple-level-metal CMOS technology. The TMS320C31 and TMS320LC31 are part of the TMS320C3x generation of DSPs from Texas Instruments.

The TMS320C3x's internal busing and special digital-signal-processing instruction set have the speed and flexibility to execute up to 80 million floating-point operations per second (MFLOPS). The TMS320C3x optimizes speed by implementing functions in hardware that other processors implement through software or microcode. This hardware-intensive approach provides performance previously unavailable on a single chip.

The TMS320C3x can perform parallel multiply and ALU operations on integer or floating-point data in a single cycle. Each processor also possesses a general-purpose register file, a program cache, dedicated ARAUs, internal dual-access memories, one DMA channel supporting concurrent I/O, and a short machine-cycle time. High performance and ease of use are results of these features.

General-purpose applications are greatly enhanced by the large address space, multiprocessor interface, internally and externally generated wait states, one external interface port, two timers, one serial port, and multiple-interrupt structure. The TMS320C3x supports a wide variety of system applications from host processor to dedicated coprocessor.

High-level-language support is easily implemented through a register-based architecture, large address space, powerful addressing modes, flexible instruction set, and well-supported floating-point arithmetic.

Features

  • High-Performance Floating-Point Digital Signal Processor (DSP):
    • TMS320C31-80 (5 V)
      25-ns Instruction Cycle Time
      440 MOPS, 80 MFLOPS, 40 MIPS
    • TMS320C31-60 (5 V)
      33-ns Instruction Cycle Time
      330 MOPS, 60 MFLOPS, 30 MIPS
    • TMS320C31-50 (5 V)
      40-ns Instruction Cycle Time
      275 MOPS, 50 MFLOPS, 25 MIPS
    • TMS320C31-40 (5 V)
      50-ns Instruction Cycle Time
      220 MOPS, 40 MFLOPS, 20 MIPS
    • TMS320LC31-40 (3.3 V)
      50-ns Instruction Cycle Time
      220 MOPS, 40 MFLOPS, 20 MIPS
    • TMS320LC31-33 (3.3 V)
      60-ns Instruction Cycle Time
      183.7 MOPS, 33.3 MFLOPS, 16.7 MIPS
  • 32-Bit High-Performance CPU
  • 16-/32-Bit Integer and 32-/40-Bit Floating-Point Operations
  • 32-Bit Instruction Word, 24-Bit Addresses
  • Two 1K × 32-Bit Single-Cycle Dual-Access On-Chip RAM Blocks
  • Boot-Program Loader
  • On-Chip Memory-Mapped Peripherals:
    • One Serial Port
    • Two 32-Bit Timers
    • One-Channel Direct Memory Access (DMA) Coprocessor for Concurrent I/O and CPU Operation
  • Fabricated Using 0.6 um Enhanced Performance Implanted CMOS (EPICTM) Technology by Texas Instruments (TITM)
  • 132-Pin Plastic Quad Flat Package
    (PQ Suffix)
  • Eight Extended-Precision Registers
  • Two Address Generators With Eight Auxiliary Registers and Two Auxiliary Register Arithmetic Units (ARAUs)
  • Two Low-Power Modes
  • Two- and Three-Operand Instructions
  • Parallel Arithmetic/Logic Unit (ALU) and Multiplier Execution in a Single Cycle
  • Block-Repeat Capability
  • Zero-Overhead Loops With Single-Cycle Branches
  • Conditional Calls and Returns
  • Interlocked Instructions for Multiprocessing Support
  • Bus-Control Registers Configure Strobe-Control Wait-State Generation

    EPIC and TI are trademarks of Texas Instruments Incorporated.

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Other qualified versions of TMS320C31

Version Part Number Definition
Catalog SM320C31 TI's standard catalog product
Military SMJ320C31 QML certified for Military and Defense Applications

Software & development tools