NXP Semiconductors DSP56321VF240

Overview

DSP56321VF240 from Freescale Semiconductor is a 24-bit digital signal processor (DSP) with a DSP56300 core, delivering 275 MMACS (550 MMACS with EFCOP), 275 MHz internal clock, 1.6 V core/3.3 V I/O supply, and integrated EFCOP coprocessor for real-time filtering in wireless infrastructure and echo cancellation systems.

For engineers reviewing the DSP56321VF240 datasheet, DSP56321VF240 pinout, DSP56321VF240 application, or DSP56321VF240 equivalent, this page provides verified functional identity, validated MAP-BGA-256 package mapping, confirmed EFCOP acceleration capability, exact memory partitioning (32K×24-bit program RAM, 80K×24-bit X/Y RAM, 1024×24-bit instruction cache), and pin-compatible alternatives for networking and telecom DSP board upgrades.

Technical Context

The DSP56321VF240 implements a fully pipelined 24×24-bit MAC with two 56-bit accumulators and a 56-bit barrel shifter, supporting single-cycle instruction execution and DSP56000 object-code compatibility. Its phase-lock loop (PLL) enables dynamic clock scaling without loss of lock, while the six-channel DMA supports 1D/2D/3D transfers with circular buffering and peripheral-triggered transfers.

The on-chip Enhanced Filter Coprocessor (EFCOP) operates in parallel with the core at 275 MHz and accelerates FIR/IIR filtering, adaptive LMS updates, and decimation up to 16×-enabling real-time echo cancellation and cellular base station signal processing without impacting channel throughput or total channel count.

Key Specifications

Pinout & Package

Molded Array Plastic Ball Grid Array (MAP-BGA) package with 256 balls, lead-free compliant, 17 mm × 17 mm footprint, 1.0 mm ball pitch. Thermal pad exposed on underside for enhanced heat dissipation in high-MACs applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DSP processing applications.

Compared with DSP56321VF240, DSP56303VF240 sacrifices EFCOP and 550 MMACS filtering capability for lower cost and power, while DSP56311VF240 retains EFCOP but trades 16 K×24-bit RAM per bank to fit into smaller die-making DSP56321VF240 the only option supporting full 80K×24-bit X/Y RAM + EFCOP in pin-compatible form.

Availability

DSP56321VF240 is available at Aetrix Electronics and suitable for wireless infrastructure, VoIP gateway, and home theater audio applications requiring stable component supply, long-term lifecycle support, and verified MAP-BGA-256 packaging.

Supply support for DSP56321VF240 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 DSP56300 family-including DSP56321VF240-was designed specifically for high-throughput, low-latency signal processing in wireless infrastructure, security encryption, and multi-channel audio systems where deterministic real-time performance is critical.

FAQ

What is the maximum operating frequency and core voltage specification for DSP56321VF240?

The DSP56321VF240 operates at a maximum internal clock frequency of 275 MHz with a 1.6 V core supply (VCCQL) and independent 3.3 V I/O supplies (VCCQH, VCCA, VCCD, etc.). This dual-voltage architecture enables high-speed computation while minimizing dynamic power consumption in the core logic block. The 275 MHz clock is generated internally via an integrated PLL with skew elimination, and the device maintains full functionality across its entire temperature range under these conditions. DSP56321VF240 does not support overclocking beyond 275 MHz.

Does DSP56321VF240 support pin-compatible replacement for other DSP56300 family members?

Yes, DSP56321VF240 is explicitly documented as pin-compatible with DSP56303VF240, DSP56L307VF240, DSP56309VF240, and DSP56311VF240 in the same MAP-BGA-256 package. All share identical ball map, power pin assignments, and signal definitions for A[0–17], D[0–23], RD/WR, MODx/IRQx, EXTAL/XTAL, and reset-related pins. However, functional differences-such as presence/absence of EFCOP or RAM size-require firmware and memory map validation before drop-in substitution. DSP56321VF240 retains full backward compatibility with DSP56300 instruction set.

How does the EFCOP in DSP56321VF240 accelerate filtering operations compared to software-only execution?

The EFCOP in DSP56321VF240 executes FIR and IIR filtering operations in parallel with the main DSP56300 core at full 275 MHz, delivering up to 550 MMACS for filtering workloads without consuming core cycles. It supports dedicated hardware for complex FIR, DF1/DFII IIR, adaptive LMS, and 4-bit decimation-reducing coefficient update latency by >95% versus software implementation. Because EFCOP accesses shared memory directly and operates independently, it eliminates bus contention and preserves full 275 MMACS core throughput for control and protocol tasks. DSP56321VF240's EFCOP requires no external memory or clock domain bridging.

What memory configuration options are available for program and data RAM in DSP56321VF240?

DSP56321VF240 offers programmable memory partitioning controlled by three MSW bits (MSW0–MSW2) in the Operating Mode Register. Valid configurations include: 32 K×24-bit program RAM + 80 K×24-bit X/Y RAM (instruction cache disabled), or 31 K×24-bit program RAM + 1024×24-bit instruction cache + 80 K×24-bit X/Y RAM (cache enabled). Total RAM remains 192 K×24-bit, with X/Y RAM sizes varying inversely with program RAM allocation-from 40 K×24-bit each (at 112 K×24-bit program) to 80 K×24-bit each (at 32 K×24-bit program). DSP56321VF240 includes 12 K×24-bit memory shared between core and EFCOP.

Is DSP56321VF240 supported by current development tools and debug infrastructure?

Yes, DSP56321VF240 is supported by Freescale's legacy CodeWarrior Development Studio for DSP56300, including full OnCE™-enabled debugging via JTAG interface. The integrated OnCE module provides real-time trace, hardware breakpoints, and non-intrusive register inspection without halting the core. While NXP no longer releases new toolchain versions, CodeWarrior v8.3 and earlier remain fully functional for DSP56321VF240 firmware development, and third-party emulators (e.g., Lauterbach TRACE32) maintain active support. DSP56321VF240's JTAG TAP complies with IEEE 1149.1 standards.