NXP Semiconductors DSPB56364AF100

Overview

DSPB56364AF100 from Freescale Semiconductor is a 24-bit audio digital signal processor (DSP) built on the DSP56300 core, delivering 100 MIPS at 100 MHz and 3.3 V. It integrates on-chip memory (1.5K × 24-bit Y-RAM, 1K × 24-bit X-RAM, 8K × 24-bit ROM), ESAI and SHI peripherals, and a PLL-based clock generator. It targets real-time sound field processing and acoustic equalization in professional audio systems.

For engineers reviewing the DSPB56364AF100 datasheet, DSPB56364AF100 pinout, DSPB56364AF100 application, or DSPB56364AF100 equivalent, key selection criteria include its 100 MHz internal clock speed, 24-bit fixed-point architecture, ESAI interface supporting I²S/AC97 protocols, 100-pin TQFP package, and object-code compatibility with the DSP56000 family.

Technical Context

The DSPB56364AF100 implements the DSP56300 core with a 24 × 24-bit MAC unit, 56-bit barrel shifter, and six-channel DMA controller. Its PLL supports programmable frequency multiplication (1–4096×) and power-saving clock division (2ⁱ, i = 0–7), enabling low-noise clock synthesis for audio applications.

It features dual-bus memory architecture (X/Y/P buses), on-chip program RAM (0.5K × 24-bit) and bootstrap ROM (192 × 24-bit), and configurable peripheral expansion via an 8-bit external data bus supporting up to 2 × 16M × 8-bit DRAM or 2 × 256K × 8-bit SRAM.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (Low-Profile Quad Flat Package), 14 mm × 14 mm body, 0.5 mm lead pitch, exposed thermal pad (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-21364 and DSP56362F100, the DSPB56364AF100 uniquely balances 100 MIPS fixed-point performance, integrated ESAI for plug-and-play audio connectivity, and multi-rail power isolation-making it optimal for mid-tier professional and high-fidelity consumer audio where deterministic latency and hardware-accelerated protocol handling are essential.

Availability

DSPB56364AF100 is available at Aetrix Electronics and suitable for home theater receivers, automotive infotainment systems, and professional audio equipment requiring stable component supply and long-term industrial lifecycle support.

Supply support for DSPB56364AF100 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 was a leading designer of embedded processors, analog, and mixed-signal semiconductors, later acquired by NXP Semiconductors in 2015.

The DSP56364 product line was engineered specifically for real-time digital audio signal processing, emphasizing low-latency peripheral interfaces (ESAI/SHI), deterministic fixed-point computation, and power-domain isolation to meet stringent electromagnetic compatibility requirements in audio systems.

FAQ

What is the maximum external memory capacity supported by DSPB56364AF100?

DSPB56364AF100 supports up to 2 × 16M × 8-bit words of external memory using DRAM, or 2 × 256K × 8-bit words using SRAM, via its glueless 8-bit external data bus and 18-bit address bus. The memory expansion port allows simultaneous SRAM and DRAM interfacing without external logic, enabling flexible memory partitioning for program and data storage in audio buffer-intensive applications.

Does DSPB56364AF100 support I²S protocol natively?

Yes, DSPB56364AF100 supports I²S natively through its Enhanced Serial Audio Interface (ESAI), which is programmable to operate in I²S, Sony, AC97, and custom network modes. The ESAI provides dedicated frame sync (FSR/FST), bit clock (SCKR/SCKT), and high-frequency clock (HCKR/HCKT) signals, allowing direct connection to stereo or multi-channel ADCs/DACs without protocol translation logic.

What power supply requirements does DSPB56364AF100 have?

DSPB56364AF100 requires a nominal 3.3 V supply but uses seven isolated power domains: VCCP (PLL), VCCLQ (core logic), VCCHQ (I/O), VCCA (address bus), VCCD (data bus), VCCC (bus control), and VCCS (ESAI/SHI). Each domain has dedicated ground pins (GNDP, GNDQ, GNDA, GNDD, GNDC, GNDS) and mandates local decoupling-critical for maintaining >100 dB SNR in audio signal chains.

Is DSPB56364AF100 pin-compatible with other DSP563xx devices?

No, DSPB56364AF100 is not pin-compatible with earlier DSP563xx variants like DSP56309 or DSP56362 due to differences in peripheral integration (e.g., ESAI vs. SSI), power pin count (18 VCC/VSS pins), and package size (100-pin TQFP vs. 80-pin PQFP). Pin mapping must be verified against the DSP56364-specific signal descriptions in Section 2 of the technical data sheet.

How does the PLL in DSPB56364AF100 reduce clock jitter for audio applications?

The DSPB56364AF100 PLL reduces clock jitter through wide-range programmable multiplication (1–4096×) and predivider factors (1–16), combined with a dedicated low-noise VCCP/GNDP power domain and external capacitor filtering via the PCAP pin. This architecture enables clean, integer-ratio clock synthesis from low-frequency crystals-minimizing phase noise that would otherwise degrade audio DAC/ADC performance and cause audible artifacts.