NXP Semiconductors DSP56321VL275

Overview

DSP56321VL275 from Freescale Semiconductor is a 24-bit digital signal processor (DSP) with a DSP56300 core, delivering 275 MMACS at 275 MHz core clock, 1.6 V core voltage, and 3.3 V I/O voltage. It integrates 32 K × 24-bit program RAM, 80 K × 24-bit X/Y data RAM, 1024 × 24-bit instruction cache, and an on-chip Enhanced Filter Coprocessor (EFCOP) for parallel FIR/IIR filtering - used in wireless infrastructure baseband processing.

For engineers reviewing the DSP56321VL275 datasheet, DSP56321VL275 pinout, DSP56321VL275 application, or DSP56321VL275 equivalent, key selection criteria include EFCOP acceleration capability, MAP-BGA-256 package compatibility, 24-bit parallel MAC architecture, internal memory configuration options, and support for ESSI/SCI/HI08 peripheral interfaces in multi-channel real-time signal processing systems.

Technical Context

The DSP56321VL275 implements a fully pipelined 24 × 24-bit MAC unit with two 56-bit accumulators and a 56-bit barrel shifter, enabling single-cycle multiply-accumulate operations. Its phase-lock loop (PLL) generates the internal 275 MHz clock from external crystal input (EXTAL), supporting static operation down to 0 Hz.

The EFCOP operates synchronously with the core at 275 MHz and supports real/complex FIR, DF-I/DF-II IIR, adaptive LMS filters, and 4-bit decimation - all without consuming core cycles. Memory mapping is controlled via MSW0–MSW2 bits, enabling dynamic allocation of up to 112 K × 24-bit program RAM and 40 K × 24-bit X/Y RAM each.

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.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DSP56321VL275, DSP56303VL275 offers lower cost but no EFCOP or instruction cache - limiting real-time filtering throughput. DSP56311VL275 retains full EFCOP capability but removes HI08, reducing host integration flexibility while simplifying PCB layout for embedded-only deployments.

Availability

DSP56321VL275 is available at Aetrix Electronics and suitable for wireless infrastructure, IP telephony gateways, and home entertainment systems requiring stable component supply, long-term lifecycle support, and verified MAP-BGA-256 sourcing.

Supply support for DSP56321VL275 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 DSP56321VL275 belongs to the DSP56300 family - designed specifically for high-performance, low-power, memory-rich signal processing in wireless infrastructure, security, and consumer audio applications.

FAQ

What is the maximum operating frequency of the DSP56321VL275 core?

The DSP56321VL275 core operates at a maximum internal clock frequency of 275 MHz, generated by its integrated PLL from the external EXTAL crystal input. This frequency enables 275 million multiply-accumulates per second (MMACS) in standard operation, and the EFCOP can double effective throughput to 550 MMACS for supported filtering algorithms. The device maintains full functionality across its entire temperature range under specified 1.6 V core and 3.3 V I/O conditions. DSP56321VL275 does not require external clock generation circuitry beyond the crystal or oscillator connected to EXTAL/XTAL pins.

Does the DSP56321VL275 support external memory expansion?

Yes, the DSP56321VL275 supports external memory expansion via its 18-bit address bus (A[0–17]) and 24-bit data bus (D[0–23]), enabling up to two 256 K × 24-bit data memory spaces and one 256 K × 24-bit program memory space. Chip select logic and bus control signals (RD, WR, AA[0–3], TA, BR, BG, BB) provide glueless interface to standard SRAMs. The DSP56321VL275 also includes six-channel DMA with 1D/2D/3D transfer support to manage external memory traffic efficiently without core intervention.

How does the EFCOP in the DSP56321VL275 improve real-time filtering performance?

The EFCOP in the DSP56321VL275 executes FIR and IIR filtering operations in parallel with the main DSP core at the same 275 MHz clock rate, delivering up to 550 MMACS for convolution-based workloads. It supports real/complex FIR, DF-I/DF-II IIR, adaptive LMS, and 4-bit decimation - all without consuming core cycles or memory bandwidth. This allows the DSP56321VL275 to sustain full 275 MHz core operation for protocol stack or control tasks while the EFCOP handles computationally intensive baseband or audio filtering independently.

What debug and development interfaces does the DSP56321VL275 provide?

The DSP56321VL275 integrates the OnCE™ (On-Chip Emulation) module with a standard JTAG test access port (TAP), supporting non-intrusive real-time debugging, breakpoint insertion, register and memory inspection, and instruction trace. It does not require external debug probes beyond standard JTAG adapters. The OnCE interface works concurrently with normal operation, enabling firmware validation in production-like environments. DSP56321VL275 also supports bootstrapping from internal ROM and external memory, simplifying development and field updates.

Is the DSP56321VL275 pin-compatible with other devices in the DSP56300 family?

Yes, the DSP56321VL275 is explicitly documented as pin-compatible with the DSP56303, DSP56L307, DSP56309, and DSP56311 - all in the same MAP-BGA-256 package. This allows direct replacement in existing PCB layouts when upgrading from earlier variants, provided power delivery, thermal management, and software initialization sequences are validated. Pin compatibility covers all signal names, locations, and electrical characteristics defined in the Rev. 11 technical data sheet, including identical ball assignments for A[0–17], D[0–23], ESSI, SCI, HI08, and interrupt/control pins.