NXP Semiconductors MIMXRT595SFAWCR

Overview

MIMXRT595SFAWCR from NXP Semiconductors is a dual-core low-power crossover processor integrating an Arm Cortex-M33 CPU (up to 275 MHz) and a Cadence Tensilica Fusion F1 DSP (up to 275 MHz), with 5 MB shared SRAM, on-the-fly AES decryption for FlexSPI, and hardware TrustZone security. It targets voice-enabled edge devices requiring concurrent real-time control and audio processing.

For engineers reviewing the MIMXRT595SFAWCR datasheet, MIMXRT595SFAWCR pinout, MIMXRT595SFAWCR application, or MIMXRT595SFAWCR equivalent, key selection considerations include its WLCSP141 package, 9 FlexComm interfaces (with I2C/UART/SPI/I2S reconfigurability), dual-domain power management, and integrated PUF-based secure key generation.

Technical Context

The MIMXRT595SFAWCR implements a tightly coupled dual-processor architecture: the Cortex-M33 handles real-time system control, secure boot, and peripheral orchestration, while the Fusion F1 DSP executes low-latency audio preprocessing-including DMIC decimation, voice activation detection, and beamforming-using dedicated 8 KB SRAM banks. Both cores share access to 5 MB low-leakage SRAM and a unified AHB bus matrix.

Its security subsystem integrates TrustZone for Armv8-M, a hardware Crypto/FFT engine (Casper), Physically Unclonable Function (PUF) for key derivation, and on-the-fly AES-256 decryption (OTFAD) for external Flash. Power delivery uses five independent VDDIO rails and supports deep-sleep retention at 0.6 V core voltage with wake-up via RTC, OS/Event Timer, or GPIO pattern match.

Key Specifications

Pinout & Package

Package: WLCSP141 (141-ball wafer-level chip-scale package, 0.35 mm pitch, 4.525 mm × 4.525 mm footprint).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-core audio-capable microcontroller applications.

Compared with MIMXRT595SFAWCR, MIMXRT595SFFOC offers greater I/O flexibility and thermal margin at the expense of footprint and layout complexity, while MIMXRT555SFAWCR reduces cost and power by removing the DSP - making it viable only where audio algorithm offload is handled externally or omitted entirely.

Availability

MIMXRT595SFAWCR is available at Aetrix Electronics and suitable for smart earbuds, voice remote controls, and portable medical audio monitors requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for MIMXRT595SFAWCR 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

NXP Semiconductors is a global semiconductor company specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with leadership in ARM-based crossover processors and edge AI acceleration.

The i.MX RT500 series, including MIMXRT595SFAWCR, was designed specifically for ultra-low-power voice and audio edge applications - merging real-time MCU determinism with DSP-grade signal processing in a single die.

FAQ

What is the maximum operating frequency of the Cortex-M33 and DSP cores in the MIMXRT595SFAWCR?

The MIMXRT595SFAWCR supports both the Arm Cortex-M33 and Cadence Tensilica Fusion F1 DSP cores at up to 275 MHz. This frequency is achievable under standard operating conditions (VDDCORE ≥ 0.95 V, ambient temperature ≤ 85 °C) and enables simultaneous real-time control and high-throughput audio processing without performance throttling.

Does the MIMXRT595SFAWCR support secure boot from external Flash?

Yes, the MIMXRT595SFAWCR supports secure boot from external Flash via its FlexSPI interface with on-the-fly AES-256 decryption (OTFAD). The ROM bootloader validates the signature of the initial image using RSA-2048, then decrypts and executes code directly from encrypted external Flash - ensuring firmware confidentiality and integrity without exposing plaintext in SRAM.

How many digital microphone channels does the MIMXRT595SFAWCR support, and what preprocessing is available?

The MIMXRT595SFAWCR supports up to 8 PDM digital microphone channels with integrated hardware decimation and Voice Activation Detection (VAD). Each channel includes programmable gain, high-pass filtering, and sample-rate conversion - enabling low-latency, power-efficient voice trigger detection entirely within the DMIC subsystem before data reaches the DSP or CPU.

What is the package type and thermal profile of the MIMXRT595SFAWCR?

The MIMXRT595SFAWCR uses a WLCSP141 package (4.525 mm × 4.525 mm, 0.35 mm pitch) with a junction-to-ambient thermal resistance (RθJA) of 35.3 °C/W. Its maximum junction temperature is 105 °C, and it operates across –20 °C to +85 °C ambient - making it suitable for thermally constrained portable devices with passive cooling only.

Can the MIMXRT595SFAWCR operate in deep-sleep mode while maintaining RTC and OS/Event Timer functionality?

Yes, the MIMXRT595SFAWCR retains full RTC and 64-bit OS/Event Timer operation in Deep_sleep and Deep_powerdown modes. The RTC resides in the "always-on" voltage domain and can generate wake-up interrupts; the OS/Event Timer continues timestamping and match/capture events - enabling precise, ultra-low-power scheduling for voice-triggered wake-up intervals as short as 10 ms.