Analog Devices Inc. ADSP-21571KSWZ-5

Overview

ADSP-21571KSWZ-5 from Analog Devices is a dual-core SHARC+ DSP with Arm Cortex-A5 co-processor in 176-lead LQFP_EP package, operating at 500 MHz per SHARC+ core and supporting 32-/40-/64-bit floating-point arithmetic. It integrates 2 × 384 kB L1 SRAM with parity, 1 MB L2 SRAM with ECC, and dual CAN 2.0 interfaces - deployed in automotive audio domain controllers requiring deterministic real-time signal processing and application-layer OS support.

For engineers reviewing the ADSP-21571KSWZ-5 datasheet, ADSP-21571KSWZ-5 pinout, ADSP-21571KSWZ-5 application, or ADSP-21571KSWZ-5 equivalent, key selection criteria include SHARC+ core clock speed, L1 SRAM partitioning options, Arm Cortex-A5 cache configuration, CAN2.0 interface count, and LQFP_EP thermal performance under automotive temperature range.

Technical Context

The ADSP-21571KSWZ-5 implements a heterogeneous dual-domain architecture: two SHARC+ cores execute SIMD floating-point audio algorithms with zero-overhead circular buffering and 48-bit VISA instructions, while the Arm Cortex-A5 core runs Linux-based middleware and manages peripherals via TrustZone-secured memory protection. The system crossbar enables concurrent DMA transfers across L1 SRAM, L2 SRAM, and external DDR2/DDR3/LPDDR1 via 16-bit L3 interface.

It features integrated safety mechanisms including dual CRC units, watchdog timers, thermal monitor unit (TMU), and system protection unit (SPU) for fault containment. Peripherals include 3× I²C, 2× SPI + 1× Quad-SPI, 3× UARTs, 2× CAN2.0, 1× USB 2.0 HS, 1× EMAC, 8-channel 12-bit HADC, and 4× ASRCs - all routed through the Signal Routing Unit (SRU) for flexible interconnect without software overhead.

Key Specifications

Pinout & Package

ADSP-21571KSWZ-5 uses a 176-lead LQFP_EP (exposed pad) package with 0.5 mm pitch, 24 × 24 mm body size, and RoHS compliance. Thermal pad enhances heat dissipation in automotive under-hood environments.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar heterogeneous DSP + application processor applications.

Compared with ADSP-21573KSWZ-5, the ADSP-21571KSWZ-5 trades DDR3/USB capability for LQFP manufacturability and lower thermal resistance; versus ADSP-SC571WYZ-5, it offers identical hardware but lacks certified safety artifacts - making it suitable for non-ASIL applications where cost and ease of assembly are prioritized.

Availability

ADSP-21571KSWZ-5 is available at Aetrix Electronics and suitable for automotive infotainment, professional audio equipment, industrial condition monitoring, and medical imaging systems requiring stable component supply across long production lifecycles.

Supply support for ADSP-21571KSWZ-5 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision, power, and connectivity applications.

The ADSP-21571KSWZ-5 belongs to the SHARC+ family designed specifically for deterministic, high-throughput audio and sensor signal processing in safety-aware embedded systems - combining floating-point DSP performance with application-level programmability.

FAQ

What is the maximum operating frequency of each SHARC+ core in the ADSP-21571KSWZ-5?

The ADSP-21571KSWZ-5 operates each SHARC+ core at up to 500 MHz, delivering ≥2000 MFLOPS per core for real-time floating-point computation. This frequency is achieved using an internal PLL locked to an external CLKIN source, and is validated across the full automotive temperature range (−40°C to +105°C). The ADSP-21571KSWZ-5 does not support overclocking beyond this rated speed.

Does the ADSP-21571KSWZ-5 include an integrated DDR memory controller?

No, the ADSP-21571KSWZ-5 does not include an integrated DDR memory controller. Unlike the ADSP-21573KSWZ-5 variant, this part omits the 16-bit DDR3/DDR2/LPDDR1 L3 interface. Instead, it relies on its 1 MB on-chip L2 SRAM with ECC for data storage and buffering - sufficient for many standalone audio and control applications without external DRAM.

How many CAN 2.0 interfaces does the ADSP-21571KSWZ-5 support, and are they electrically isolated?

The ADSP-21571KSWZ-5 supports two independent CAN 2.0 interfaces (CAN0 and CAN1), each with dedicated TX/RX pins and hardware message buffers. These interfaces are not electrically isolated on-die; external galvanic isolation (e.g., ISO1050 or ADM3053) must be implemented in the signal path for bus protection. Both interfaces operate at bit rates up to 1 Mbps and include built-in error counters and loopback modes for diagnostics.

Can the Arm Cortex-A5 core in the ADSP-21571KSWZ-5 run a full Linux distribution?

Yes, the Arm Cortex-A5 core in the ADSP-21571KSWZ-5 - running at 500 MHz with 32 kB L1 instruction and data caches plus 256 kB L2 cache - is capable of booting and executing lightweight Linux distributions such as Buildroot or Yocto Project images. However, due to absence of an integrated DDR controller, external SDRAM must be added to the board to provide sufficient RAM for kernel and userspace execution.

What development tools are officially supported for the ADSP-21571KSWZ-5?

Analog Devices officially supports CrossCore Embedded Studio (CCES) v2.12+ for ADSP-21571KSWZ-5 firmware development, including C/C++ compilation, SHARC+ assembly optimization, and JTAG debugging via ICE-1000/2000 emulators. The ADSP-21571KSWZ-5 is also supported by SigmaStudio for SHARC for audio algorithm design and automatic code generation targeting the SHARC+ cores.