3rd Generation, Low-Cost, 150 MHz SHARC Processor

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Product Details

The ADSP-21261 is the lowest cost member of the third-generation of SHARC® programmable digital signal processors. A range of cost-sensitive applications such as voice recognition, medical appliances, measurement devices, high-quality audio, and automotive entertainment systems will benefit from the ADSP-21261’s integration of large on-chip memory and diverse set of peripherals.

The ADSP-21261 is well suited for use in cost sensitive, signal processing applications.

The ADSP-21261 is based on the SHARC (SIMD) core that supports execution of 32-bit fixed-point and 32/40-bit floating-point arithmetic formats. With its core running at 150MHz (6.67 ns instruction cycle time), the ADSP-21261 is capable of executing complex Fast Fourier Transform (FFT) operations—1024-point complex FFT in 61us. The processor’s single-instruction, multiple data (SIMD) mode effectively doubles the processor performance.

The ADSP-21261 offers a high level of integration, including 1 Mbit of on-chip dual-ported SRAM and 3Mbits of mask programmable ROM memory. This large on-chip dual-ported memory enables sustained processor and I/O performance without the need for external memory. System I/O is achieved through four full-duplex serial ports, four timers, a 16-bit parallel port, a serial peripheral interface (SPI), 18 zero-overhead Direct Memory Access (DMA) channels delivering fast data transfers without processor intervention and an innovative Digital Audio Interface (DAI) which provides the user complete software control through its Signal Routing Unit (SRU).

Digital Audio Interface (DAI) for Simplified I/O System Development
The ADSP-21261 utilizes the Digital Audio Interface (DAI), an architecture that enables complete software programmability of various on-chip peripherals. The flexibility and ease-of-use of the SHARC programming model, combined with the DAI, allow manufacturers to deploy one hardware configuration into multiple product offerings with different I/O requirements.

Connections are made using the flexible Signal Routing Unit (SRU), a matrix routing group of pins that provides configurable and flexible connectivity between all DAI components and the SRU. The peripherals connected through the DAI are: a precision clock generator (PCG), an input data port (IDP), four SPORTS (serial ports), six flag inputs, six flag outputs, three timers and the SRU. The IDP provides an additional input path to the DSP core, configurable as 8 channels of receive serial data or as 7 channels of receive serial data and a single channel of up to a 20-bit wide parallel data. This level of integration enables the designer to take full advantage of a wide variety of peripherals without sacrificing the overall system performance.

CROSSCORE Development Tools
All 3rd Generation SHARC Processors are supported by ADI’s CROSSCORE brand of award winning development tools. The CROSSCORE components include the VisualDSP++™ software development environment, EZ-KIT Lite™ evaluation systems, and emulators.

VisualDSP++ is an integrated software development environment, allowing for fast and easy development, debug, and deployment. The EZ-KIT Lite evaluation system provides an easy way to investigate the power of the ADI family of processors and begin to develop applications. Emulators are available for PCI and USB host platforms for rapid on-chip debugging. Additional development tools and algorithms are available from an extensive third-party development community.

Note: The functional block diagram is available in the data sheet.

Product Lifecycle

recommend Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits


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EVAL-21262-EZLITE Circuit Diagram

EVAL-21262-EZLITE Photo

Product Details

The ADSP-21262 EZ-KIT Lite provides developers with a cost-effective method for initial evaluation of the ADSP-21262 SHARC Processor architecture for audio applications via a USB-based PC-hosted tool set. With this EZ-KIT Lite, users can learn more about ADI’s ADSP-21262 hardware and software development and quickly prototype applications.

The EZ-KIT Lite includes an ADSP-21262 Processor desktop evaluation board along with an evaluation suite of the VisualDSP++ development and debugging environment with the C/C++ compiler, assembler, and linker. VisualDSP++ development and debugging software, along with the USB-based debugger interface, enables users to perform standard debugging functions (such as read and write memory, read and write registers, load and execute executables, set and clear breakpoints, and single-step assembly, C, and C++ source code).

Part Number:

Tools Support:
Tel: 1-800-ANALOGD (262-5643)
Contact Support



Product Details

The Blackfin SHARC USB EZ-Extender plugs onto the expansion interface of the ADSP-BF518F and ADSP-21469 EZ-Board and EZ-KIT Lite’s. The EZ-Extender aids the design and prototyping phases of the processor targeted applications and extends the capabilities of the evaluation system by providing a connection between the asynchronous memory bus of the Blackfin/SHARC processor and a USB 2.0 device.

Ordering Information:

CROSSCORE® Tools Support:
Tel: 1-800-ANALOGD (262-5643)
Contact Support



Product Details

The SHARC Audio EZ-Extender provides users the ability to evaluate audio application on the ADSP-214xx EZ-Board/ EZ-KIT Lite. Software examples are provided in the latest update of VisualDSP++.

The EZ-Extender consists of three Analog Devices AD1939 audio codecs and provides 24 channels of analog audio out, 12 channels of analog audio in. The primary codec operates in both in I2S and TDM mode and can run at sample rates of 48, 96, or 192 KHz. The other two codec are configured to operate in Dual Line TDM mode. The three codecs together can operate in dual line TDM mode for 24 analog channels out and 12 analog channels in at a sample rate of 192KHz.

The audio input and output is available via multiple RCA connectors. A group of switches are available if a user should decide to evaluate the audio codec inputs and outputs in a differential mode. (NOTE: DB25 to XLR cables are not supplied with the EZ-Extender).

Ordering Information:

CROSSCORE® Tools Support:
Tel: 1-800-ANALOGD (262-5643)
Contact Support


EVAL-21262-EZEXT Circuit Diagram

Product Details

The SHARC® EZ-Extender™ daughter board allows developers to connect a number of Analog Devices analog-to-digital (ADC) High Speed Converter (HSC) evaluation boards to the ADSP-21262 EZ-KIT Lite™. SHARC EZ-Extender also provides developers a breadboard area and the ability to access all of the pins on the ADSP-21262 EZ-KIT Lite's expansion interface.

Applications and information about the use and connection of the various interfaces on the SHARC EZ-Extender are available from Analog Devices.

Part Number

Tools Support: 

Tel: 1-800-ANALOGD (262-5643)
Contact Support

For additional information, contact your local Analog Devices Sales Office or Distributor.


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Software & Systems Requirements


Software & Tools Anomalies


Tools & Simulations

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BSDL Model Files

Design Resources

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

ADSP-21261 Material Declaration
PCN-PDN Information Quality And Reliability Symbols and Footprints

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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Evaluation Boards Pricing displayed is based on 1-piece.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.