NXP Semiconductors DSP56303AG100R2

Overview

DSP56303AG100R2 from Freescale Semiconductor is a 24-bit programmable digital signal processor (DSP) built on the DSP56300 core architecture, delivering 100 MMACS at 100 MHz 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 clock generation, and on-chip peripherals including HI08 host interface, two ESSI ports, SCI, and triple timers. It targets real-time voice/data/fax processing in multi-line telecom systems.

For engineers reviewing the DSP56303AG100R2 datasheet, DSP56303AG100R2 pinout, DSP56303AG100R2 application, or DSP56303AG100R2 equivalent, this page provides verified functional identity, validated TQFP-144 package mapping, confirmed 24-bit data/18-bit address bus width, exact internal memory configuration (4096×24 PRAM, 2048×24 XRAM/YRAM), and documented peripheral register-level compatibility with DSP56300 family instruction set.

Technical Context

The DSP56303AG100R2 implements a fully static, object-code-compatible evolution of the DSP56000 core, featuring a 56-bit barrel shifter, two 56-bit accumulators, and a 24×24-bit MAC unit capable of 56-bit result accumulation. Its six-channel DMA supports one-, two-, and three-dimensional transfers with circular buffering and interrupt-on-completion triggers.

On-chip peripherals include a 16-bit parallel HI08 host interface with glueless ISA bus support, two independent ESSI ports (each with one receiver and three transmitters), an SCI with baud rate generator, and a triple timer module-all multiplexed with GPIO pins. The PLL enables skew-eliminated clock output and allows dynamic divide factor changes without loss of lock.

Key Specifications

Pinout & Package

The DSP56303AG100R2 is packaged in a 144-pin Thin Quad Flat Package (TQFP) with 0.5 mm pitch, lead-free compliant per Rev. 11 documentation. Pin functions are grouped into Power (18 VCC/GND variants), External Bus (A[0–17], D[0–23], RD/WR/TA/BR/BG/CAS/AA[0–3]), PLL (EXTAL/XTAL/CLKOUT/PCAP/PINIT), Interrupt/Mode (MODA–MODD, IRQA–IRQD, RESET), Host Interface (H[0–7], HA0–HA2, HCS, HRW, HDS, HREQ, HACK), ESSI/SCI/Timers (SC0/SC1/SCK0/SCK1/SRD0/STD0/SRD1/STD1/RXD/TXD/TIO0–TIO2), and JTAG/OnCE (TCK/TDI/TDO/TMS/TRST).

Key Features

Applications

Equivalent & Alternatives

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

Compared with DSP56303AG100R2, the DSP56303FG100R2 offers identical signal processing capability in a thermally superior BGA package ideal for high-density designs, while the ADSP-2189M trades integrated peripherals for greater raw memory and floating-point headroom-making it suitable only for non-hosted, compute-bound applications where HI08/ESSI are unnecessary.

Availability

DSP56303AG100R2 is available at Aetrix Electronics and suitable for multi-line voice/data/fax gateways, VoIP terminals, and video conferencing audio subsystems requiring stable component supply across extended production lifecycles.

Supply support for DSP56303AG100R2 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 interfaces, and connectivity solutions for automotive, industrial, and communications markets.

The DSP56303AG100R2 belongs to the DSP56300 family-designed specifically for cost-sensitive, real-time telecom and audio applications requiring deterministic 24-bit fixed-point performance with integrated host and serial interfaces.

FAQ

What is the maximum operating frequency and voltage specification for the DSP56303AG100R2?

The DSP56303AG100R2 operates at a maximum internal clock frequency of 100 MHz with a guaranteed performance of 100 MMACS. It is specified for 3.0–3.6 V supply range, with 3.3 V nominal operation. All I/O pins-including PINIT/NMI and HI08 port-are 5 V tolerant, enabling direct interfacing with legacy 5 V logic without level shifters. This voltage range ensures compatibility with standard 3.3 V LDO regulators and robust noise immunity in telecom environments.

Does the DSP56303AG100R2 support external memory expansion, and what are the limits?

Yes, the DSP56303AG100R2 supports external memory expansion via its Port A interface. It can expand data memory to two 256 K × 24-bit word spaces and program memory to one 256 K × 24-bit word space. Chip select logic and DRAM controller support enable glueless interface to SRAM and DRAM devices. The DSP56303AG100R2's AA[0–3]/RAS[0–3] signals allow flexible decoding of up to 16 chip selects or DRAM row addressing, making it suitable for scalable buffer and code storage in voice gateway applications.

How does the PLL in the DSP56303AG100R2 function, and what signals are involved?

The DSP56303AG100R2 features an integrated PLL with skew elimination and dynamic divide factor adjustment without loss of lock. Key signals include EXTAL (external crystal/clock input), XTAL (crystal output), CLKOUT (synchronized core clock output), PCAP (PLL filter capacitor connection), and PINIT (PLL enable latch at reset). When enabled, the PLL generates the internal 100 MHz clock from a lower-frequency crystal; when disabled, CLKOUT runs at half the EXTAL frequency. This flexibility allows system designers to optimize EMI and power consumption based on timing requirements.

What peripheral interfaces are integrated into the DSP56303AG100R2, and how are they configured?

The DSP56303AG100R2 integrates HI08 (8-bit parallel host interface), two ESSI ports (each with one receiver and three transmitters), SCI (asynchronous serial), triple timer, six-channel DMA, and JTAG/OnCE debug interface. These peripherals are multiplexed with GPIO pins (PB[0–15], PC[0–5], PD[0–5], PE[0–2], TIO0–TIO2) and configured via dedicated control registers. For example, ESSI0 uses Port C pins SC0[0–2]/SCK0/SRD0/STD0, while HI08 operates in non-multiplexed or multiplexed bus mode depending on HA0–HA2 settings-enabling flexible hardware reuse in compact designs.

Is the DSP56303AG100R2 pin-compatible with other members of the DSP56300 family?

The DSP56303AG100R2 shares the same 144-pin TQFP footprint and signal mapping as other DSP56303 variants (e.g., DSP56303AG100, DSP56303AG100R1), ensuring mechanical and electrical compatibility within the same speed grade and package type. However, it is not pin-compatible with DSP56301 or DSP56302 due to differing peripheral sets and pin allocations-for instance, the DSP56303AG100R2 dedicates specific pins to ESSI1 and HI08 that are absent or repurposed in earlier models. Always verify pinout diagrams and register maps before substitution.