NXP Semiconductors DSP56303AG100B1

Overview

DSP56303AG100B1 from Freescale Semiconductor is a 24-bit programmable digital signal processor (DSP) with DSP56300 core architecture, delivering 100 MMACS at 100 MHz internal clock frequency, operating at 3.3 V nominal supply, and featuring integrated 8 KB on-chip RAM (4 KB program + 2 KB X-data + 2 KB Y-data), six-channel DMA, and triple timer module. It targets real-time telecommunication signal processing in multi-line voice/fax/data systems.

For engineers reviewing the DSP56303AG100B1 datasheet, DSP56303AG100B1 pinout, DSP56303AG100B1 application, or DSP56303AG100B1 equivalent, this page provides verified technical context, validated package mapping to 144-pin TQFP, confirmed peripheral interfaces (HI08, dual ESSI, SCI), and two documented alternative DSPs for voice-processing and embedded audio applications.

Technical Context

The DSP56303AG100B1 implements a fully static 24-bit DSP56300 core with parallel 24×24-bit MAC unit producing 56-bit results, dual 56-bit accumulators, and 56-bit barrel shifter supporting fast normalization and bit-stream operations. Its instruction cache supports position-independent code and nested hardware DO loops for efficient loop execution.

It integrates six-channel DMA supporting 1D/2D/3D transfers and circular buffering, triggered by peripherals or interrupts; an on-chip PLL enables clock multiplication with skew elimination; and OnCE™ debug interface provides JTAG-based real-time emulation. Power management includes WAIT and STOP modes with full static operation down to 0 Hz.

Key Specifications

Pinout & Package

The DSP56303AG100B1 is packaged in a 144-pin Thin Quad Flat Package (TQFP) with 0.5 mm pitch, thermally enhanced exposed pad, and lead-free finish per Rev. 11 documentation. Pin functions are multiplexed across functional ports (A–E) and GPIO groups, requiring configuration via mode registers.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DSP56303AG100B1, the DSP56309AG100B1 offers expanded on-chip memory while maintaining pin and code compatibility, whereas the ADSP-2189MKSTZ-133 trades fixed-point efficiency and integrated peripherals for floating-point accuracy and higher peak throughput-requiring board-level redesign.

Availability

DSP56303AG100B1 is available at Aetrix Electronics and suitable for multi-line voice processing, video conferencing audio subsystems, and industrial signal analysis requiring stable component supply across extended production lifecycles.

Supply support for DSP56303AG100B1 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 embedded processors, analog, and connectivity solutions for automotive, industrial, and communications markets.

The DSP56303AG100B1 belongs to the DSP56300 family-engineered specifically for cost-sensitive, power-efficient real-time signal processing in telecom infrastructure and consumer audio equipment.

FAQ

What is the maximum operating frequency and voltage specification for the DSP56303AG100B1?

The DSP56303AG100B1 operates at a maximum internal clock frequency of 100 MHz with a nominal supply voltage of 3.3 V, specified over a 3.0–3.6 V range. Its fully static CMOS design allows operation down to 0 Hz, and it supports WAIT and STOP low-power modes without clock dependency. This makes DSP56303AG100B1 suitable for battery-backed or energy-constrained embedded DSP applications where deterministic timing and power gating are essential.

Does the DSP56303AG100B1 support external memory expansion, and what interfaces are provided?

Yes, the DSP56303AG100B1 supports external memory expansion via its dedicated Port A interface, providing 18-bit address bus (A[0–17]), 24-bit data bus (D[0–23]), and full bus control signals including RD, WR, CAS, RAS[0–3], and AA[0–3]. It enables expansion to two 256 K × 24-bit data memory spaces and one 256 K × 24-bit program memory space, with built-in chip select logic and DRAM controller for glueless SRAM/DRAM interfacing-key for scalable voice-processing systems using DSP56303AG100B1.

How many serial interfaces does the DSP56303AG100B1 integrate, and what are their configurations?

The DSP56303AG100B1 integrates three serial interfaces: one SCI (asynchronous UART with baud rate generator), and two ESSI ports (ESSI0 and ESSI1). Each ESSI port features one receiver and three transmitters, supporting up to six-channel synchronous audio streaming. SCI supports standard RS-232/RS-485 communication, while ESSI0 and ESSI1 operate independently with configurable clocks and frame formats-making DSP56303AG100B1 ideal for multi-codec audio routing in conferencing systems.

What debug and emulation capabilities are built into the DSP56303AG100B1?

The DSP56303AG100B1 includes Freescale's OnCE™ (On-Chip Emulation) module with JTAG test access port (TAP), enabling non-intrusive real-time debugging, instruction trace, hardware breakpoints, and full register visibility without halting program execution. It supports background memory access and real-time watchpoints-critical for validating time-critical DSP56303AG100B1 firmware in live audio or telephony applications where stop-mode debugging introduces unacceptable latency.

Is the DSP56303AG100B1 pin-compatible with other members of the DSP56300 family, and which packages are supported?

The DSP56303AG100B1 is offered in a 144-pin TQFP package (lead-free, 0.5 mm pitch) and shares pinout compatibility with other TQFP variants in the DSP56300 family, including DSP56309AG100B1. However, pin mappings for certain GPIO-peripheral multiplexing (e.g., HI08 vs. ESSI) depend on mode register configuration-not physical pin assignment alone. Always verify signal routing against the specific variant's datasheet, as MAP-BGA variants (e.g., 196-pin) are not pin-compatible with DSP56303AG100B1's TQFP footprint.