NXP Semiconductors DSP56321VL240

Overview

DSP56321VL240 from Freescale Semiconductor is a 24-bit digital signal processor (DSP) with a DSP56300 core, delivering 275 MMACS (550 MMACS with EFCOP), operating at 275 MHz internal clock, 1.6 V core / 3.3 V I/O supply, and integrated 192 K × 24-bit on-chip RAM for networking and wireless infrastructure applications.

For engineers reviewing the DSP56321VL240 datasheet, DSP56321VL240 pinout, DSP56321VL240 application, or DSP56321VL240 equivalent, key selection criteria include EFCOP-accelerated FIR/IIR filtering capability, MAP-BGA-256 package compatibility, 24-bit parallel MAC architecture, and pin-compatibility with DSP56303/DSP56309 for migration paths in telecom baseband processing.

Technical Context

The DSP56321VL240 implements a fully pipelined 24 × 24-bit MAC with two 56-bit accumulators and a 56-bit barrel shifter, supporting real/complex FIR, DF-I/DF-II IIR, and adaptive LMS filtering via its dedicated EFCOP coprocessor running in parallel with the core at 275 MHz. It features six-channel DMA with 1D/2D/3D transfers and circular buffering support.

Its memory subsystem includes programmable allocation of 192 K × 24-bit on-chip RAM across program RAM (up to 112 K), instruction cache (1024 × 24-bit), X/Y data RAM (up to 80 K each), and 12 K × 24-bit shared memory for EFCOP-core coherency. The external bus interface supports 256 K × 24-bit program and dual 256 K × 24-bit data memory expansion.

Key Specifications

Pinout & Package

Molded Array Plastic Ball Grid Array (MAP-BGA) package with 256 balls, lead-free compliant, 17 mm × 17 mm body size, 1.0 mm ball pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital signal processor applications.

Compared with DSP56321VL240, DSP56309VF240 offers identical footprint and software compatibility but sacrifices 100% EFCOP acceleration and 50% RAM capacity, while ADSP-21161NKCAZ-200 delivers higher computational precision at the cost of complete architectural incompatibility and no pin or code reuse.

Availability

DSP56321VL240 is available at Aetrix Electronics and suitable for wireless infrastructure, IP telephony gateways, and home theater audio processors requiring stable component supply across extended production lifecycles.

Supply support for DSP56321VL240 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

Freescale Semiconductor (now part of NXP Semiconductors) is a fabless semiconductor company specializing in embedded processing, analog, and connectivity solutions for automotive, industrial, and networking markets.

The DSP56321VL240 belongs to the DSP56300 family, designed specifically for high-throughput, low-latency fixed-point signal processing in telecom infrastructure and consumer audio systems where deterministic real-time performance and on-chip memory density are critical.

FAQ

What is the maximum operating frequency and voltage specification for the DSP56321VL240?

The DSP56321VL240 operates with an internal 275 MHz clock generated by its integrated PLL. Its core logic requires a 1.6 V supply (VCCQL), while all I/O banks-including address, data, bus control, HI08, ESSI, SCI, and timer interfaces-require 3.3 V (VCCQH, VCCA, VCCD, VCCC, VCCH, VCCS). These separate supplies enable noise isolation and optimal power efficiency.

Does the DSP56321VL240 include an instruction cache, and what is its size and impact on performance?

Yes, the DSP56321VL240 includes a 1024 × 24-bit instruction cache. When enabled, it reduces external program memory accesses during tight loops and repetitive code execution, improving effective instruction throughput by up to 40% in benchmarked FIR filter kernels. Cache behavior is controlled via MSW bits in the memory configuration register.

How does the Enhanced Filter Coprocessor (EFCOP) in the DSP56321VL240 accelerate signal processing tasks?

The EFCOP in the DSP56321VL240 executes FIR, IIR, and adaptive filtering algorithms in parallel with the main DSP56300 core at full 275 MHz speed. It supports real/complex coefficients, decimation ratios up to 16×, and true LMS coefficient updates-enabling 550 MMACS peak performance without consuming core cycles or degrading channel throughput in echo-cancellation or baseband applications.

Is the DSP56321VL240 pin-compatible with other devices in the DSP56300 family, and which ones?

Yes, the DSP56321VL240 is pin-compatible with the DSP56303, DSP56L307, DSP56309, and DSP56311 in the same MAP-BGA-256 package. This allows direct replacement in existing designs for performance upgrades or feature expansion (e.g., adding EFCOP) without PCB layout changes, provided power delivery and thermal design accommodate the higher 275 MHz operation.

What types of external memory interfaces does the DSP56321VL240 support, and what are their addressing limits?

The DSP56321VL240 supports external memory expansion via a 18-bit address bus (A[0–17]) and 24-bit data bus (D[0–23]). It can expand program memory to one 256 K × 24-bit space and data memory to two independent 256 K × 24-bit spaces. Chip select logic and AA[0–3] signals enable glueless interfacing with standard SRAMs and allow flexible memory mapping through priority or decoded configurations.