Analog Devices Inc. ADSP-21571CSWZ-4

Overview

ADSP-21571CSWZ-4 from Analog Devices is a dual-core SHARC+ DSP with Arm Cortex-A5 co-processor, operating at 500 MHz per SHARC+ core and supporting 32-/40-/64-bit floating-point arithmetic. It integrates 3 MB L1 SRAM (384 kB per core), 1 MB ECC-protected L2 SRAM, and dual CAN 2.0 interfaces. Designed for automotive audio processing, it delivers deterministic real-time signal execution alongside application-level OS support.

For engineers reviewing the ADSP-21571CSWZ-4 datasheet, ADSP-21571CSWZ-4 pinout, ADSP-21571CSWZ-4 application, or ADSP-21571CSWZ-4 equivalent, key selection criteria include SHARC+ core clock speed, L1 SRAM partitioning, CAN interface count, HADC channel count (8-channel), and CSP_BGA package compatibility with automotive thermal requirements.

Technical Context

The ADSP-21571CSWZ-4 implements a heterogeneous dual-core architecture: two SHARC+ SIMD cores handle parallel floating-point signal processing with zero-overhead circular buffers and DAG-based addressing, while the Arm Cortex-A5 core (500 MHz, NEON/VFPv4-D16) manages system control, Linux-capable tasks, and peripheral orchestration. Memory coherency is maintained via shared L2 SRAM and PL310 L2 cache controller.

Its system infrastructure includes a dedicated signal routing unit (SRU), four full SPORTs, one S/PDIF transceiver, four ASRCs, and dual precision clock generators - all synchronized under a unified clock generation unit (CGU). The processor supports AEC-Q100 qualification and integrates TrustZone security for secure boot and cryptographic acceleration.

Key Specifications

Pinout & Package

The ADSP-21571CSWZ-4 is housed in a 176-lead LQFP_EP (exposed pad) package, optimized for automotive thermal dissipation and PCB layout simplicity. Pin assignments follow multiplexed GPIO mapping across Ports A–D, with dedicated ball/lead functions defined in Analog Devices' official 176-Lead LQFP Lead Assignments documentation (Rev. C, pp. 134–137).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-core audio DSP applications.

Compared with ADSP-21571CSWZ-4, ADSP-21573CSWZ-4 expands memory bandwidth and interconnect capability at the cost of package complexity, while ADSP-SC571WYZ-4 trades general-purpose flexibility for certified safety readiness - both require distinct hardware design and qualification paths.

Availability

ADSP-21571CSWZ-4 is available at Aetrix Electronics and suitable for automotive infotainment, professional audio equipment, and industrial motor control applications requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant performance.

Supply support for ADSP-21571CSWZ-4 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.

The ADSP-21571CSWZ-4 belongs to the SHARC+ dual-core DSP product line, engineered to unify high-precision floating-point computation with application-layer processing in a single chip for automotive and pro-audio systems.

FAQ

What is the maximum operating frequency of each SHARC+ core in the ADSP-21571CSWZ-4?

The ADSP-21571CSWZ-4 operates each SHARC+ core at a maximum frequency of 500 MHz, as confirmed in Table 2 of the Rev. C datasheet. This clock speed enables sustained 1 GFLOPS per core for 32-bit floating-point operations and supports real-time execution of complex audio algorithms such as 256-tap FIR filters with sub-10 µs latency. The ADSP-21571CSWZ-4 does not support overclocking beyond this rated speed.

Does the ADSP-21571CSWZ-4 include an integrated DDR memory controller?

No, the ADSP-21571CSWZ-4 does not include a DDR memory controller. As shown in Table 2 of the Rev. C datasheet, DDR3/DDR2/LPDDR1 controller support is marked "N/A" for ADSP-21571 variants. Instead, the ADSP-21571CSWZ-4 relies on its 1 MB on-chip L2 SRAM with ECC protection and 3 MB distributed L1 SRAM for deterministic memory access - making it suitable for latency-sensitive applications where external DRAM introduces jitter.

How many analog input channels does the ADSP-21571CSWZ-4 support, and what is their resolution?

The ADSP-21571CSWZ-4 integrates an 8-channel, 12-bit successive approximation register (SAR) analog-to-digital converter (HADC), as specified in Table 1 and detailed on page 64 of the Rev. C datasheet. All eight channels are accessible simultaneously in the 176-lead LQFP package, with support for programmable gain and reference voltage selection - enabling direct connection to microphones, sensors, or line-level audio sources without external ADC components.

Is the ADSP-21571CSWZ-4 qualified for automotive applications?

Yes, the ADSP-21571CSWZ-4 is AEC-Q100 qualified for automotive applications, as explicitly stated in the "Additional Features" section (page 1) and Table 3 of the Rev. C datasheet. It operates across the extended temperature range of −40°C to +105°C and includes built-in thermal monitoring, watchdog timers, and memory protection units - meeting baseline reliability requirements for automotive infotainment and body electronics, though not ASIL-certified out-of-box.

What debug and trace capabilities are supported by the ADSP-21571CSWZ-4?

The ADSP-21571CSWZ-4 supports Arm CoreSight debug architecture including ETM (Embedded Trace Macrocell) interface, JTAG, and SWD. Both SHARC+ cores and the Arm Cortex-A5 core provide independent debug access via a unified debug port, enabling real-time instruction tracing, breakpoint setting, and memory inspection. The processor also includes a System Trace Macrocell (STM) for cross-core event correlation - essential for debugging time-critical audio synchronization issues in the ADSP-21571CSWZ-4.