NXP Semiconductors DSPB56366AG120

Overview

DSPB56366AG120 from Freescale Semiconductor is a 24-bit programmable digital signal processor (DSP) built on the DSP56300 core, delivering 120 MIPS at 120 MHz and 3.3 V for real-time audio processing. It integrates dual ESAI interfaces, SPDIF transmitter (DAX), SHI, triple timer, and six-channel DMA - enabling sound field processing, acoustic equalization, and multi-format digital audio playback in professional audio systems.

For engineers reviewing the DSPB56366AG120 datasheet, DSPB56366AG120 pinout, DSPB56366AG120 application, or DSPB56366AG120 equivalent, key selection criteria include its 144-pin LQFP package, 24-bit data/program word width, 120 MHz internal clock with PLL, dual ESAI support (including ESAI_1 with shared pins), and 5 V-tolerant GPIOs on MODA/IRQA–MODD/IRQD, PB0–PB13, and HA0–HA10.

Technical Context

The DSPB56366AG120 implements the DSP56300 architecture with a 24×24+56→56-bit MAC, dual 56-bit accumulators, and 24-bit addressing. Its instruction cache (3K×24), barrel shifter, and position-independent code support enable high-efficiency execution of complex audio algorithms while maintaining object-code compatibility with the 56K family.

It features two independent serial audio interfaces (ESAI and ESAI_1), each supporting I²S, AC97, Sony, and network protocols - though ESAI_1 shares four data pins with ESAI and omits HCKR/HCKT clocks. The DAX module supports SPDIF, IEC958, CP-340, and AES/EBU formats, and the HDI08 parallel host interface provides 8-bit multiplexed/non-multiplexed connectivity with DMA support.

Key Specifications

Pinout & Package

The DSPB56366AG120 is housed in a 144-pin plastic LQFP package (20 mm × 20 mm, 0.5 mm pitch) with dedicated power/ground domains per functional block - including VCCP/GNDP for PLL, VCCQL/GNDQ for core logic, and VCCS/GNDS for ESAI/DAX/SHI/timer peripherals.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 24-bit audio DSP applications.

Compared with DSPB56366AG120, DSPB56367AG120 offers identical real-time audio processing capability but requires matching boot firmware, while MC56F8323 sacrifices audio interface depth and MIPS for integrated MCU functionality and lower BOM cost - making it unsuitable for professional audio algorithm execution.

Availability

DSPB56366AG120 is available at Aetrix Electronics and suitable for professional audio mixers, automotive infotainment head units, and studio monitor controllers requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.

Supply support for DSPB56366AG120 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 processors, analog, and mixed-signal solutions for automotive, industrial, and networking markets.

The DSPB56366AG120 belongs to the Symphony™ DSP family - designed specifically for high-fidelity digital audio processing in professional and automotive environments, emphasizing low-latency peripheral integration and code compatibility across generations.

FAQ

What is the maximum operating frequency and voltage specification for the DSPB56366AG120?

The DSPB56366AG120 operates at a maximum internal clock frequency of 120 MHz with a nominal supply voltage of 3.3 V. It features a fully static CMOS design that supports operation down to DC, and its PLL allows flexible clock synthesis from external sources. All I/O pins except EXTAL, PCAP, and PINIT/NMI are 5 V tolerant, simplifying interface with legacy 5 V logic.

Does the DSPB56366AG120 support both I²S and AC97 audio protocols simultaneously?

Yes, the DSPB56366AG120 supports both I²S and AC97 protocols simultaneously through its dual ESAI modules. ESAI and ESAI_1 can be independently configured - for example, ESAI as master I²S for DAC communication and ESAI_1 as slave AC97 for codec control - though ESAI_1 shares four data pins with ESAI and lacks HCKR/HCKT clock signals.

How does the HDI08 parallel host interface function on the DSPB56366AG120?

The HDI08 interface on the DSPB56366AG120 provides an 8-bit parallel port configurable for multiplexed (address/data on HAD0–HAD7) or non-multiplexed (separate HA0–HA10 and H0–H7) host buses. It supports DMA transfers and defaults to GPIO mode after reset. Pins PB0–PB13 and HA0–HA10 are 5 V tolerant, easing integration with common microcontrollers.

What memory resources are available on-chip for program and data storage in the DSPB56366AG120?

The DSPB56366AG120 includes 40K×24 bits of Program ROM, 3K×24 bits of Program RAM (configurable as instruction cache), 13K×24 bits of X-Data RAM, 7K×24 bits of Y-Data RAM, and 8K×24 bits of Y-Data ROM. Up to 10K×24 bits of Program RAM can be formed by reallocating portions of X/Y RAM, supporting large audio algorithm buffers and patchable firmware.

Is JTAG debugging supported on the DSPB56366AG120, and what tools are compatible?

Yes, the DSPB56366AG120 supports IEEE 1149.1 JTAG boundary-scan and OnCE™ (On-Chip Emulation) for hardware/software debugging. It is compatible with Freescale's DSC-USB-ML-PP and Tower System debug probes, and works with CodeWarrior Development Studio for DSP56800/E. The TCK, TDO, TMS, and TRST pins provide full visibility into core state, memory, and peripheral registers during development.