NXP Semiconductors SPAKDSP321VF240

Overview

SPAKDSP321VF240 from Freescale Semiconductor is a 24-bit digital signal processor (DSP) featuring a DSP56300 core, 275 MHz internal clock, 1.6 V core / 3.3 V I/O supply, and integrated Enhanced Filter Coprocessor (EFCOP) delivering up to 550 MMACS in filtering applications. It includes 192 K × 24-bit on-chip RAM (configurable X/Y/Program/Cache allocation), dual ESSI ports, HI08 host interface, and JTAG/OnCE debug support - deployed in wireless infrastructure baseband processing.

For engineers reviewing the SPAKDSP321VF240 datasheet, SPAKDSP321VF240 pinout, SPAKDSP321VF240 application, or SPAKDSP321VF240 equivalent, key selection criteria include EFCOP-accelerated FIR/IIR filter throughput, 24-bit addressing depth, MAP-BGA-240 pin compatibility with DSP56303/DSP56309, and low-power STOP/WAIT mode support for telecom line cards.

Technical Context

The SPAKDSP321VF240 implements a fully static, object-code-compatible DSP56000 architecture with parallel 24×24-bit MAC, 56-bit barrel shifter, and six-channel DMA supporting 1D/2D/3D transfers and circular buffering. Its PLL enables skew-free clock generation while maintaining lock during divide factor changes.

EFCOP operates in parallel with the core at full 275 MHz, executing real/complex FIR, DF-I/DF-II IIR, and adaptive LMS filters with 4-bit decimation and four programmable scaling factors - enabling real-time echo cancellation and multi-channel baseband processing without core intervention.

Key Specifications

Pinout & Package

Molded Array Plastic Ball Grid Array (MAP-BGA) package with 240 solder balls, 1.27 mm pitch, 17 mm × 17 mm body size, and exposed thermal pad. Compliant with JEDEC MO-251 and RoHS requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DSP56309VF240, SPAKDSP321VF240 adds 275 MMACS EFCOP acceleration and 64 K more RAM - critical for multi-channel echo cancellation. Versus ADSP-21161NKCAZ-200, it trades floating-point flexibility for lower power, deterministic fixed-point latency, and telecom-optimized peripherals.

Availability

SPAKDSP321VF240 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 SPAKDSP321VF240 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) designed high-performance, low-power embedded processors for automotive, industrial, and communications markets.

The DSP56300 family - including SPAKDSP321VF240 - was engineered specifically for real-time signal processing in wireless infrastructure, security systems, and consumer audio, emphasizing deterministic latency, memory bandwidth, and peripheral integration.

FAQ

What is the maximum operating frequency and voltage specification for the SPAKDSP321VF240?

The SPAKDSP321VF240 operates at a maximum internal clock frequency of 275 MHz. It requires a 1.6 V ± 0.1 V supply for the core logic (VCCQL) and separate 3.3 V ± 0.3 V supplies for I/O domains including VCCQH, VCCA, VCCD, VCCH, and VCCS. These independent power rails minimize noise coupling between core and interface circuitry, ensuring signal integrity in high-speed memory and serial interface operations. The SPAKDSP321VF240 maintains full functionality across this voltage range under specified thermal conditions.

Does the SPAKDSP321VF240 include on-chip memory, and how is it allocated?

Yes, the SPAKDSP321VF240 integrates 192 K × 24-bit of on-chip RAM, partitioned into Program RAM, X Data RAM, Y Data RAM, and Instruction Cache. Allocation is controlled by MSW0–MSW2 bits in the Operating Mode Register, enabling 12 configurations - for example, 32 K × 24-bit Program RAM + 1024 × 24-bit Instruction Cache + 80 K × 24-bit X/Y RAM each. This configurability allows optimization for specific algorithm footprints. The SPAKDSP321VF240 also includes 192 × 24-bit bootstrap ROM and supports external expansion to 256 K × 24-bit program and two 256 K × 24-bit data spaces.

How does the Enhanced Filter Coprocessor (EFCOP) in the SPAKDSP321VF240 improve real-time filtering performance?

The EFCOP in the SPAKDSP321VF240 executes FIR, IIR, and adaptive LMS filtering in parallel with the main DSP core at full 275 MHz, delivering up to 550 MMACS. It supports real/complex coefficients, 4-bit decimation, and four output scaling factors - accelerating echo cancellation, channel equalization, and correlation tasks without consuming core cycles. Because the EFCOP accesses shared memory directly and operates independently, the SPAKDSP321VF240 sustains full channel throughput while offloading compute-intensive filtering, reducing overall latency and improving determinism in telecom and audio applications.

Is the SPAKDSP321VF240 pin-compatible with other devices in the DSP56300 family?

Yes, the SPAKDSP321VF240 is explicitly documented as pin-compatible with the DSP56303, DSP56L307, DSP56309, and DSP56311 - all housed in the same MAP-BGA-240 package. This enables drop-in replacement in existing designs targeting those variants, provided firmware and memory map configurations align. Pin compatibility covers all 240 ball positions including power, ground, address/data buses, ESSI, HI08, and JTAG signals. The SPAKDSP321VF240 retains identical mechanical and thermal characteristics, simplifying board-level qualification.

What debug and emulation capabilities does the SPAKDSP321VF240 support?

The SPAKDSP321VF240 integrates the OnCE™ (On-Chip Emulation) module with full JTAG Test Access Port (TAP) compliance, enabling non-intrusive real-time debugging, instruction trace, hardware breakpoints, and register visibility without halting core execution. It supports background memory access during run mode and provides visibility into EFCOP state alongside CPU registers. The SPAKDSP321VF240's debug infrastructure is compatible with Freescale's CodeWarrior development suite and third-party emulators supporting the DSP56300 JTAG protocol, streamlining bring-up and validation of complex signal processing firmware.