ADSP-21571KSWZ-4 ADI SHARC+ Dual-Core 32/40-bit Floating-Point DSP 400MHz 2MB SRAM 8-Ch ASRC LQFP-176

ADSP-21571KSWZ-4 Product Overview

The ADSP-21571KSWZ-4 from Analog Devices is a high-performance dual-core 32/40-bit floating-point digital signal processor (DSP) based on the SHARC+ architecture, designed for advanced audio, industrial, and automotive applications that require high integration, rich audio peripherals, and reliable real-time processing. The ADSP-21571KSWZ-4 integrates two SHARC+ cores, each running at 400MHz, and features a generous 2MB (16Mbit) of on-chip SRAM, significantly reducing the need for external memory. Integrated peripherals include eight full-duplex serial ports (SPORTs), an eight-channel high-performance asynchronous sample rate converter (ASRC), an S/PDIF transceiver, hardware FIR/IIR/FFT accelerators, and an external memory controller supporting SDRAM and Flash. Packaged in a 176-lead LQFP (24mm×24mm) with a commercial temperature range of 0°C to +70°C, the ADSP-21571KSWZ-4 provides a compact and efficient single-chip solution for indoor multi-channel audio and signal processing.

ADSP-21571KSWZ-4 Core Features

Processor Core: The ADSP-21571KSWZ-4 features a dual-core 32/40-bit floating-point SHARC+ architecture, each core at 400MHz with SIMD engine

Large On-Chip SRAM: The ADSP-21571KSWZ-4 provides 2MB (16Mbit) of high-speed SRAM for low-latency program and data access

Hardware Accelerators: The ADSP-21571KSWZ-4 includes built-in FIR, IIR, and FFT acceleration engines to offload common signal processing tasks

ASRC: The ADSP-21571KSWZ-4 offers an 8-channel stereo high-performance asynchronous sample rate converter, up to 192kHz, seamlessly connecting digital audio sources with different clock domains

Serial Audio Ports: The ADSP-21571KSWZ-4 provides 8 full-duplex SPORTs, supporting I2S, TDM, and left/right-justified protocols

S/PDIF Transceiver: The ADSP-21571KSWZ-4 integrates a professional-grade digital audio transceiver

External Memory Interface: The ADSP-21571KSWZ-4 supports 16-bit SDRAM and asynchronous SRAM/Flash

General-Purpose Connectivity: The ADSP-21571KSWZ-4 includes SPI, TWI (I2C), UART, CAN, PWM, and GPIOs

Package: The ADSP-21571KSWZ-4 comes in a 176-lead LQFP (24mm×24mm), commercial temperature range 0°C to +70°C

Speed Grade: The ADSP-21571KSWZ-4 is rated -4, each core at 400MHz

ADSP-21571KSWZ-4 Applications

Professional Audio: The ADSP-21571KSWZ-4 excels in digital mixing consoles, audio matrices, effects processors, studio monitors, and multi-channel amplification

Automotive Audio: The ADSP-21571KSWZ-4 handles in-vehicle DSP, active noise cancellation (ANC), voice enhancement, and multi-zone sound

Industrial Instrumentation: The ADSP-21571KSWZ-4 is suitable for real-time control, vibration analysis, and sensor signal conditioning

Medical Electronics: The ADSP-21571KSWZ-4 supports biopotential signal acquisition and ultrasound digital beamforming

High-End Consumer: The ADSP-21571KSWZ-4 is used in A/V receivers, soundbars, and home theater processors

Test & Measurement: The ADSP-21571KSWZ-4 is ideal for audio analyzers and dynamic signal analyzers

ADSP-21571KSWZ-4 Key Advantages

Dual SHARC+ Parallel Processing: The ADSP-21571KSWZ-4's two 400MHz cores can execute different algorithms in parallel, effortlessly handling multi-channel audio and complex signal flows

Extra Large On-Chip SRAM: The ADSP-21571KSWZ-4's 2MB internal high-speed memory reduces dependency on external memory and simplifies system design

Complete Audio Acceleration Suite: The ADSP-21571KSWZ-4 integrates hardware FIR/IIR/FFT, 8-channel ASRC, and S/PDIF on a single chip for signal conditioning and audio connectivity

Rich Connectivity: The ADSP-21571KSWZ-4 offers 8 SPORTs, CAN, multiple SPI/I2C/UART for versatile system control and data transfer

Commercial-Grade Value: Optimized for 0°C to +70°C indoor applications, the ADSP-21571KSWZ-4 delivers dual-core performance with cost-effectiveness

Mature Software Ecosystem: The ADSP-21571KSWZ-4 is supported by CrossCore Embedded Studio with SHARC+ optimized audio algorithm libraries and multi-core development support

Compact LQFP Package: The ADSP-21571KSWZ-4 features a 176-lead LQFP for easier PCB layout and manual soldering during prototyping

Flexible Expansion: The ADSP-21571KSWZ-4 provides an external SDRAM/Flash interface to meet large algorithm demands

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FAQ

1. What is the ADSP-21571KSWZ-4?
   It is a dual-core SHARC+ 32/40-bit floating-point DSP from Analog Devices, with each core running at 400MHz, 2MB on-chip SRAM, 8-channel ASRC, S/PDIF transceiver, and hardware FIR/IIR/FFT accelerators. The ADSP-21571KSWZ-4 operates over the commercial temperature range of 0°C to +70°C, suitable for indoor multi-channel audio and industrial signal processing.
2. What are the key specifications?
   Dual SHARC+ cores at 400MHz each; 2MB (16Mbit) on-chip SRAM; 8 SPORTs (I2S/TDM), 2 SPI, UART, CAN, S/PDIF transceiver; 8-channel 192kHz ASRC; hardware FIR/IIR/FFT accelerators; 16-bit external memory interface; 176-lead LQFP package (24mm×24mm); 1.1V core/3.3V I/O; temperature 0°C to +70°C.
3. What are the benefits of the dual-core SHARC+ architecture?
   Two independent DSP cores can process different algorithms or tasks in parallel, greatly increasing system throughput and real-time performance, ideal for complex audio systems with high channel counts.
4. What is the advantage of the 2MB on-chip SRAM?
   The ADSP-21571KSWZ-4's large internal memory allows storing programs and most data directly on the DSP, significantly reducing access latency to slower external memories and simplifying PCB design, especially for applications requiring long delay buffers or multi-channel data processing.
5. What dedicated audio hardware does this DSP integrate?
   Besides the dual DSP cores, the ADSP-21571KSWZ-4 includes an 8-channel asynchronous sample rate converter (ASRC), an S/PDIF transceiver, and hardware FIR/IIR/FFT accelerators, enabling sample rate conversion, digital audio I/O, and common signal processing acceleration without external chips.
6. What applications is the ADSP-21571KSWZ-4 suitable for?
   It targets professional audio equipment (digital mixers, audio matrices, effects), automotive audio systems (ANC, multi-zone sound), high-end consumer audio (AV receivers, soundbars), as well as industrial instrumentation and medical electronics requiring dual-core processing.
7. What development environment is used?
   The recommended IDE is CrossCore Embedded Studio (CCES), an Eclipse-based environment offering C/C++ compilers, debugger, simulator, and SHARC+-optimized audio algorithm libraries, with support for multi-core debugging and task allocation.
8. What is the operating temperature range? Can it be used outdoors?
   This specific model (K suffix) operates over the commercial temperature range of 0°C to +70°C, suitable for indoor or well-cooled equipment. Other temperature grades are available for extended ranges.
9. Does it support external memory expansion?
   Yes, the ADSP-21571KSWZ-4 provides a 16-bit external memory interface that can connect to SDRAM, asynchronous SRAM, or parallel Flash for storing large program code or expanding data buffers.
10. What audio protocols are supported?
    All 8 SPORT ports support standard serial audio protocols including I2S, TDM, and left/right-justified, enabling direct connection to audio ADCs, DACs, and codecs. The integrated S/PDIF transceiver handles coaxial and optical digital audio signals.