DSP56321VF240
DSP56321VF240 - 240MHz 24-bit DSP, 196-MAPBGA | NXP Semiconductors
The NXP Semiconductors DSP56321VF240 is a 24-bit fixed-point digital signal processor (DSP) from the DSP56300 family, operating at 240 MHz (480 MMACS) and housed in a 196-ball MAPBGA (15x15 mm, 1 mm pitch) package. It integrates a high-performance single-clock-cycle-per-instruction engine, DSP56000-compatible code base, a barrel shifter, 24-bit addressing, an instruction cache, and a six-channel DMA unit. The device is qualified for 3.3V I/O operation and targets networking, security encryption, and home entertainment applications.
What is a 24-bit fixed-point DSP? A digital signal processor (DSP) is a specialized microprocessor optimized for the high-speed arithmetic demands of real-time signal processing, including audio codecs, modems, and encryption. Fixed-point DSPs represent numeric values using integer arithmetic with scaling, which delivers higher performance per MHz and lower cost than floating-point parts for many embedded workloads. The 24-bit word width in the DSP56300 family provides the dynamic range required for professional audio (24-bit PCM at 48 kHz/96 kHz) and for crypto primitives such as AES and DES. Within the broader taxonomy, the DSP56321 is a digital signal processor -> microcontroller-class SoC -> semiconductor -> integrated circuit.
Key features include 240 MHz core clock, 480 million multiply-accumulate operations per second (MMACS), 576 KB on-chip RAM, a 576-byte bootstrap ROM, and a rich peripheral set comprising a Host Interface, two Synchronous Serial Interfaces (SSI), and a Serial Communications Interface (SCI). The device also provides an external address bus, an external bus interface with instruction-cache control, and a memory-expansion area with both program RAM and instruction cache (each 24 bits x 24 bits). An integrated Address Generation Unit (AGU) and six-channel DMA engine offload the core from data-movement tasks.
Architecturally, the DSP56321 is a member of the Freescale/NXP DSP56300 family. The DSP56000-compatible instruction set enables reuse of legacy firmware, while the instruction cache and dual-memory architecture (X-data, Y-data, program memory) sustain the 1-clock-cycle throughput. The barrel shifter and hardware DO loop registers accelerate signal-processing kernels such as FIR filters, FFT butterflies, and Viterbi decoding.
Typical applications include VoIP gateways, DSL/cable modems, audio processing (mixing, equalization, sample-rate conversion), secure communications (encryption/decryption engines), industrial control DSP front-ends, and home-entertainment audio systems. The DSP56321's 480 MMACS throughput is well-matched to multi-channel audio and to security IPsec/SSL acceleration at edge rates.
When designing with the DSP56321VF240, pay close attention to the MAPBGA-196 PCB footprint (1 mm ball pitch) and to thermal management: at 240 MHz the device dissipates substantial power and requires a thermal pad and via array. The I/O voltage is 3.3 V, so level shifting is required for 1.8 V or 5 V peripherals.
This page synthesizes distributor stock levels, lifecycle status (NXP marked this part End of Life), and pin-compatible DSP56300-family alternatives - information not aggregated on a single datasheet page.
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