NXP Semiconductors DSP56321VF275

Overview

DSP56321VF275 from Freescale Semiconductor is a 24-bit fixed-point digital signal processor (DSP) with a 275 MHz core clock, 1.6 V core supply, and 3.3 V I/O voltage, delivering 275 MMACS (550 MMACS with EFCOP acceleration). It integrates 192 K × 24-bit on-chip RAM (configurable as 32 K program RAM + 1024-word instruction cache + 80 K X/Y data RAM), dual ESSI ports, HI08 host interface, and six-channel DMA - deployed in wireless infrastructure base stations for real-time echo cancellation and multi-channel signal processing.

For engineers reviewing the DSP56321VF275 datasheet, DSP56321VF275 pinout, DSP56321VF275 application, or DSP56321VF275 equivalent, key selection criteria include EFCOP-enabled FIR/IIR filter throughput, MAP-BGA-256 package compatibility, 24-bit address/data bus timing, PLL-configurable clock generation, and OnCE™ JTAG debug support for embedded DSP firmware development.

Technical Context

The DSP56321VF275 implements the DSP56300 core architecture with full DSP56000 object-code compatibility, featuring a fully pipelined 24 × 24-bit MAC unit, 56-bit barrel shifter, two 56-bit accumulators, and position-independent code support. Its instruction cache (1024 × 24 bits) and programmable memory mapping (MSW0–MSW2) enable dynamic allocation of X/Y/program RAM resources across 11 configurations.

Parallel execution is enabled by the Enhanced Filter Coprocessor (EFCOP), which operates synchronously at 275 MHz and supports real/complex FIR, DF-I/DF-II IIR, adaptive LMS filtering, and 4× decimation - all without consuming core cycles or reducing channel throughput. The external bus interface includes 18-bit address (A[0–17]), 24-bit data (D[0–23]), and dedicated control lines (RD/WR/TA/BR/BG/BB) for glueless SRAM expansion.

Key Specifications

Pinout & Package

Molded Array Plastic Ball Grid Array (MAP-BGA) package with 256 balls, 1.27 mm pitch, and lead-free or lead-bearing options. Pinout defined per functional port groups: Port A (external memory), Port B (HI08/GPIO), Ports C/D (ESSI/GPIO), Port E (SCI/GPIO), and dedicated clock/power/control signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-21161NKCAZ-200 and DSP56303VF200, the DSP56321VF275 uniquely delivers fixed-point 550 MMACS via EFCOP-assisted filtering - making it optimal for echo cancellation and multi-channel telecom DSP where deterministic latency and integer throughput outweigh floating-point flexibility.

Availability

DSP56321VF275 is available at Aetrix Electronics and suitable for wireless infrastructure, home entertainment systems, and IP telephony gateways requiring stable component supply, long-term lifecycle support, and verified industrial temperature grade operation.

Supply support for DSP56321VF275 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) was a leading designer of high-performance embedded processors, analog, and mixed-signal ICs for automotive, industrial, and communications markets.

The DSP56321VF275 belongs to the DSP56300 family - engineered specifically for networking, security encryption, and home entertainment applications demanding high MIPS/MMACS efficiency, large on-chip memory, and hardware-accelerated signal processing.

FAQ

What is the maximum operating frequency and power supply configuration for the DSP56321VF275?

The DSP56321VF275 operates at a maximum internal clock frequency of 275 MHz, derived from its integrated PLL. It requires a 1.6 V core supply (VCCQL) and separate 3.3 V I/O supplies (VCCQH, VCCA, VCCD, VCCC, VCCH, VCCS) - each with dedicated decoupling. This split-rail design isolates noise-sensitive core logic from high-speed I/O switching, ensuring stable operation under full MMACS load. The DSP56321VF275 datasheet specifies DC and AC electrical characteristics across this exact voltage and frequency combination.

Does the DSP56321VF275 include hardware acceleration for filtering tasks?

Yes, the DSP56321VF275 integrates an Enhanced Filter Coprocessor (EFCOP) that runs in parallel with the main DSP56300 core at 275 MHz. It accelerates real/complex FIR, DF-I/DF-II IIR, and adaptive LMS filtering - delivering up to 550 MMACS total. Unlike software-based filtering, EFCOP offloads coefficient updates and convolution entirely, preserving core cycles for control tasks and maintaining full channel throughput. This capability is explicitly documented in the DSP56321VF275 Technical Data Rev. 11 feature table and block diagram.

What package type and pin count does the DSP56321VF275 use?

The DSP56321VF275 is housed in a Molded Array Plastic Ball Grid Array (MAP-BGA) package with 256 solder balls and 1.27 mm pitch. Mechanical drawings and land patterns are provided in Chapter 3 of the official DSP56321 Technical Data document. This package supports high-density PCB layouts and thermal dissipation requirements for sustained 275 MHz operation - confirmed by Freescale's thermal characterization data and recommended PCB stack-up guidelines.

How much on-chip memory does the DSP56321VF275 provide, and how is it allocated?

The DSP56321VF275 contains 192 K × 24-bit of on-chip RAM, partitioned across program RAM, X/Y data RAM, and instruction cache. Allocation is controlled by MSW0–MSW2 bits, enabling 11 configurations - e.g., 32 K program RAM + 1024-word instruction cache + 80 K X/Y RAM, or 112 K program RAM + 40 K X/Y RAM. This configurability is detailed in Table 1 of the DSP56321 Technical Data Rev. 11 and directly impacts algorithm memory footprint and real-time scheduling.

Is the DSP56321VF275 pin-compatible with other devices in the DSP56300 family?

Yes, the DSP56321VF275 is explicitly stated as pin-compatible with the DSP56303, DSP56L307, DSP56309, and DSP56311 - per the DSP56321 Technical Data Rev. 11 introduction and packaging documentation. This compatibility covers identical ball map, signal assignments, power/ground pin locations, and mechanical footprint, enabling drop-in replacement in existing designs where performance or memory upgrades are needed without PCB revision.