NXP Semiconductors DSP56303AG100

Overview

DSP56303AG100 from Freescale Semiconductor is a 24-bit programmable digital signal processor (DSP) built on the DSP56300 core architecture, delivering 100 MMACS at 100 MHz internal clock frequency with 3.3 V nominal supply. It integrates dual 2048 × 24-bit data RAM banks (X/Y), 4096 × 24-bit program RAM, six-channel DMA, PLL-based clock generation, and on-chip OnCE™ debug support. It targets real-time telecommunication signal processing including multi-line voice/fax handling and audio codec acceleration.

For engineers reviewing the DSP56303AG100 datasheet, DSP56303AG100 pinout, DSP56303AG100 application, or DSP56303AG100 equivalent, key selection considerations include its 144-pin TQFP package, 24-bit parallel data bus (D[0–23]), external memory expansion capability up to 256 K × 24-bit per space, and HI08/ESSI/SCI peripheral interface compatibility for embedded telecom hardware design.

Technical Context

The DSP56303AG100 implements a fully static, instruction-pipelined 24×24-bit MAC unit with two 56-bit accumulators and a 56-bit barrel shifter, enabling single-cycle multiply-accumulate operations. Its architecture supports position-independent code, nested DO loops, and conditional ALU instructions optimized for real-time filtering and FFT execution.

It features a six-channel DMA controller supporting 1D/2D/3D transfers with circular buffering and interrupt triggering from peripherals or IRQ lines, alongside a configurable PLL that eliminates clock skew and allows dynamic divide factor changes without loss of lock. The OnCE™ module provides real-time emulation via JTAG, with full visibility into program flow and register states during development.

Key Specifications

Pinout & Package

The DSP56303AG100 is housed in a 144-pin Thin Quad Flat Package (TQFP) with 0.5 mm pitch, lead-free compliant, and thermal pad exposed on underside for enhanced heat dissipation. Pin assignments follow functional grouping: Port A (external memory interface), Port B (HI08/GPIO), Ports C/D (ESSI/GPIO), Port E (SCI/GPIO), plus dedicated PLL, clock, reset, and power/ground terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DSP56303AG100, the DSP56303FG100 offers identical functionality in a thermally superior BGA package but demands PCB redesign, while the ADSP-2189M provides alternative fixed/floating-point capability at lower throughput and incompatible peripheral mapping - both require firmware and hardware adaptation.

Availability

DSP56303AG100 is available at Aetrix Electronics and suitable for voice gateway, video conferencing terminal, and professional audio equipment requiring stable component supply and long-term industrial lifecycle support.

Supply support for DSP56303AG100 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 was designed specifically for cost-sensitive, high-throughput fixed-point signal processing in telecommunications infrastructure and consumer audio - emphasizing low-power operation, peripheral integration, and real-time determinism.

FAQ

What is the maximum operating frequency and voltage range for the DSP56303AG100?

The DSP56303AG100 operates at a maximum internal clock frequency of 100 MHz and is specified for 3.0–3.6 V supply voltage, with 3.3 V nominal. Its fully static CMOS design allows operation down to 0 Hz (DC), supporting ultra-low-power wait and stop modes without clock gating. This voltage range ensures compatibility with standard 3.3 V logic families and simplifies power supply design in telecom hardware where noise immunity and stability are critical. The DSP56303AG100 maintains full functionality across this range, including all peripherals and memory interfaces.

Does the DSP56303AG100 support external memory expansion, and what are the limits?

Yes, the DSP56303AG100 supports external memory expansion through its Port A interface: up to two 256 K × 24-bit word data memory spaces and one 256 K × 24-bit word program memory space. This is achieved using standard address (A[0–17]), data (D[0–23]), and control signals (RD/WR/AA/RAS/CAS). The chip includes built-in DRAM controller logic and chip select generation for glueless SRAM/DRAM interfacing. The DSP56303AG100's memory map and bus timing are fully configurable via the Bus Control Register (BCR) and Operating Mode Register (OMR), enabling adaptation to diverse memory devices without external logic.

What debugging capabilities does the DSP56303AG100 provide during development?

The DSP56303AG100 integrates Freescale's OnCE™ (On-Chip Emulation) module with full JTAG TAP (TCK/TDI/TDO/TMS/TRST), enabling real-time, non-intrusive debugging without performance impact. Engineers can set breakpoints, inspect registers and memory, trace program flow, and perform live register modification - all while the DSP56303AG100 executes full-speed code. The OnCE™ interface supports both standalone emulators and integrated IDEs like CodeWarrior, and works seamlessly with the device's instruction cache and DMA subsystem to maintain visibility across concurrent operations.

How many general-purpose I/O pins does the DSP56303AG100 offer, and how are they configured?

The DSP56303AG100 provides up to 34 programmable GPIO pins, distributed across Port B (PB[0–15]), Port C (PC[0–5]), Port D (PD[0–5]), Port E (PE[0–2]), and Timer I/O (TIO[0–2]). These pins are multiplexed with peripheral functions (HI08, ESSI, SCI, timers) and configured via dedicated control registers (e.g., PBCR, PCCR). Each pin supports Schmitt-trigger inputs, programmable drive strength, and pull-up/down options. The DSP56303AG100's GPIO flexibility allows dynamic reassignment during runtime - for example, switching PC[0–2] from ESSI0 to GPIO while retaining ESSI1 functionality - making it adaptable to evolving system requirements.

What are the key power management features of the DSP56303AG100?

The DSP56303AG100 implements three-tiered power management: fully static design (0 Hz operation), Wait mode (core clock gated, peripherals active), and Stop mode (all clocks halted, RAM retained). Power domains are isolated per function (VCCP, VCCQ, VCCA, etc.), allowing selective shutdown of unused I/O sections. Instruction- and peripheral-dependent power gating reduces dynamic consumption during idle cycles. The DSP56303AG100 exits Wait/Stop modes in <1 µs upon IRQ assertion, ensuring responsiveness in real-time telecom applications where latency must remain sub-millisecond across power state transitions.