SM320C26B

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SGUS069A – NOVEMBER 2012 – REVISED NOVEMBER 2012

DIGITAL SIGNAL PROCESSOR

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Digital Signal Processor

• Block Moves for Data or Program Management

1.1

Features

• Repeat Instructions for Efficient Use of

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• 100-ns Instruction Cycle Time

Program Space

• 1568 Words of Configurable On-Chip Data and

• Eight Auxiliary Registers and Dedicated

Program RAM

Arithmetic Unit for Indirect Addressing

• 256 Words of On-Chip Program ROM

• Serial Port for Direct Code Interface

• 128K Words of Data/Program Space

• Synchronization Input for Synchronous

• Pin-for-Pin Compatible with the SMJ320C25

Multiprocessor Configurations

• 16 Input and 16 Output Channels

• Wait States for Communication to

• 16-Bit Parallel Interface

Slow-Off-Chip Memories or Peripherals

• Directly Accessible External Data Memory

• On-Chip Timer for Control Operations

Space

• Three External Maskable User Interrupts

• Global Data Memory Interface

• Input Pin Polled by Software Branch

• 16-Bit Instruction and Data Words

Instruction

• 32-Bit ALU and Accumulator

• Programmable Output Pin for Signaling

External Devices

• Single-Cycle Multiply or Accumulate

Instructions

• 1.6-

μm CMOS Technology

• 0 to 16-Bit Scaling Shifter

• Single 5-V Supply

• Bit Manipulation and Logical Instructions

• 68-Pin Leaded Ceramic Chip Carrier (FJ Suffix)

• Instruction Set Support for Floating-Point

Operations, Adaptive Filtering, and Extended-

Precision Arithmetic

1.2

Description

The SM320C26B Digital Signal Processor is a VLSI digital signal processor and peripheral. The

SM320C26B supports a wide range of digital signal processing applications, such as telecommunications,

modems, image processing, speech processing, spectrum analysis, audio processing, digital filtering,

high-speed control, graphics, and other computation intensive applications.

With a 100-ns instruction cycle time and an innovative memory configuration, the SM320C26B performs

operations necessary for many real time digital signal processing algorithms. Since most instructions

require only one cycle, the SM320C26B is capable of executing ten million instructions per second. On-

chip programmable data/program RAM of 1568 words of 16 bits, on-chip program ROM of 256-words,

direct addressing of up to 64K-words of external program and 64K-words of data memory space, and

multiprocessor interface features for sharing global memory minimize unnecessary data transfers to take

full advantage of the capabilities of the processor.

The SM320C26B scaling shifter has a 16-bit input connected to the data bus and a 32-bit output

connected to the ALU. The scaling shifter produces a left shift of 0 to 16 bits on the input data, as

programmed in the instruction. The LSBs of the output are filled with zeroes, and the MSBs may be either

filled with zeroes or sign-extended, depending upon the status programmed into the SXM (sign-extension

mode) bit of status register ST1.

NOTE

The SM320C26B is intended to support existing designs, and is not recommended for new

designs. The datasheet has references to design software and hardware tools that may no

longer be available.

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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date. Products conform to

Copyright © 2012, Texas Instruments Incorporated

specifications per the terms of the Texas Instruments standard warranty. Production

processing does not necessarily include testing of all parameters.