SM320C26B Datasheet, PDF (1/42 Pages) Texas Instruments – DIGITAL SIGNAL PROCESSOR

SM320C26B
www.ti.com
SGUS069A – NOVEMBER 2012 – REVISED NOVEMBER 2012
DIGITAL SIGNAL PROCESSOR
1 Digital Signal Processor
1.1 Features
•1 100-ns Instruction Cycle Time
• 1568 Words of Configurable On-Chip Data and
Program RAM
• 256 Words of On-Chip Program ROM
• 128K Words of Data/Program Space
• Pin-for-Pin Compatible with the SMJ320C25
• 16 Input and 16 Output Channels
• 16-Bit Parallel Interface
• Directly Accessible External Data Memory
Space
• Global Data Memory Interface
• 16-Bit Instruction and Data Words
• 32-Bit ALU and Accumulator
• Single-Cycle Multiply or Accumulate
Instructions
• 0 to 16-Bit Scaling Shifter
• Bit Manipulation and Logical Instructions
• Instruction Set Support for Floating-Point
Operations, Adaptive Filtering, and Extended-
Precision Arithmetic
• Block Moves for Data or Program Management
• Repeat Instructions for Efficient Use of
Program Space
• Eight Auxiliary Registers and Dedicated
Arithmetic Unit for Indirect Addressing
• Serial Port for Direct Code Interface
• Synchronization Input for Synchronous
Multiprocessor Configurations
• Wait States for Communication to
Slow-Off-Chip Memories or Peripherals
• On-Chip Timer for Control Operations
• Three External Maskable User Interrupts
• Input Pin Polled by Software Branch
Instruction
• Programmable Output Pin for Signaling
External Devices
• 1.6-μm CMOS Technology
• Single 5-V Supply
• 68-Pin Leaded Ceramic Chip Carrier (FJ Suffix)
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.
1
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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
specifications per the terms of the Texas Instruments standard warranty. Production
processing does not necessarily include testing of all parameters.
Copyright © 2012, Texas Instruments Incorporated