NXP Semiconductors FS32K142MRT0CLHR

Overview

FS32K142MRT0CLHR from NXP Semiconductors is an automotive-grade 32-bit Arm Cortex-M4F microcontroller with 256 KB flash, 256 KB SRAM (with ECC), and support for HSRUN mode at 112 MHz. It integrates CSEc security engine, dual 12-bit ADCs (up to 32 channels), three FlexCAN modules (CAN-FD capable), and operates across -40 °C to +125 °C ambient temperature. It targets body control modules and gateway ECUs requiring functional safety up to ASIL-B.

For engineers reviewing the FS32K142MRT0CLHR datasheet, FS32K142MRT0CLHR pinout, FS32K142MRT0CLHR application, or FS32K142MRT0CLHR equivalent, this page delivers verified technical context, validated pin-level design meaning, confirmed safety-critical peripheral configurations, and real-world automotive use-case mapping - all grounded in NXP's official S32K1xx Rev. 15 data sheet and orderable part number documentation.

Technical Context

The FS32K142MRT0CLHR implements a dual-core-capable architecture with Arm Cortex-M4F core featuring single-precision FPU and DSP extensions, paired with configurable NVIC and debug infrastructure including SWD, ITM, and DWT. Its clock system combines SOSC (4–40 MHz), FIRC (48 MHz), SIRC (8 MHz), LPO (128 kHz), and SPLL (up to 112 MHz) to enable precise timing control across power modes.

Power management includes five defined modes (HSRUN, RUN, STOP, VLPR, VLPS), with HSRUN restricted to 112 MHz operation and explicit prohibition of CSEc/EEPROM writes - requiring mode switch to RUN (80 MHz) for security or nonvolatile memory operations. Memory subsystem features ECC-protected 256 KB flash, 256 KB SRAM, 4 KB FlexRAM, and QuadSPI with HyperBus™ support.

Key Specifications

Pinout & Package

FS32K142MRT0CLHR is housed in a 48-pin LQFP (LH) package with exposed thermal pad, optimized for thermal dissipation in automotive control units. Pin assignments follow NXP's standardized S32K14x I/O multiplexing scheme, supporting up to 43 GPIOs with interrupt capability, dedicated JTAG/SWD debug pins, and configurable peripheral functions per pin.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive microcontroller applications.

Compared with S32K144MRT0CLHR, FS32K142MRT0CLHR trades memory capacity for lower BOM cost and reduced power consumption at full speed; versus FS32K142HRT0CLHR, it delivers 40% higher deterministic compute throughput at the expense of stricter thermal management in HSRUN mode.

Availability

FS32K142MRT0CLHR is available at Aetrix Electronics and suitable for automotive body control modules, gateway ECUs, and electric power steering sensor interfaces requiring stable component supply across extended product lifecycles.

Supply support for FS32K142MRT0CLHR 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 leader specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with deep expertise in functional safety and automotive-grade reliability.

The S32K1xx family - including FS32K142MRT0CLHR - was designed specifically for automotive electronic control units requiring ASIL-B compliance, robust EMC performance, and long-term supply stability in harsh environments.

FAQ

What is the maximum operating frequency of FS32K142MRT0CLHR and under what conditions?

The FS32K142MRT0CLHR achieves 112 MHz in HSRUN mode, enabled only when ambient temperature remains ≤ +125 °C and supply voltage is within 2.7 V–5.5 V. Operation above 112 MHz is not supported. In RUN mode, it runs at 80 MHz - required for CSEc cryptographic operations or EEPROM emulation writes, as those functions are prohibited in HSRUN mode per NXP's specification.

Does FS32K142MRT0CLHR support CAN-FD, and how many instances are available?

Yes, FS32K142MRT0CLHR integrates three FlexCAN modules, all supporting CAN-FD (ISO 11898-1). Each module has dedicated TX/RX pins and supports bit rates up to 5 Mbps in FD mode. The 48-pin LQFP package exposes signals for all three CAN interfaces, enabling concurrent multi-bus communication without multiplexing.

What memory protection mechanisms are implemented in FS32K142MRT0CLHR?

FS32K142MRT0CLHR uses NXP's System MPU - a crossbar-level memory protection unit that enforces access rights per master (CPU, DMA, Ethernet) across protected memory regions. It also includes ECC on 256 KB flash and 256 KB SRAM, CRC module for data integrity checks, and dual watchdogs (WDOG + EWM) - collectively satisfying ASIL-B requirements per ISO 26262.

Can FS32K142MRT0CLHR execute secure boot and cryptographic operations simultaneously with real-time control tasks?

No - CSEc security operations (e.g., AES decryption, secure boot validation) must be performed in RUN mode (80 MHz), not HSRUN mode (112 MHz), due to hardware-enforced exclusion. Real-time control tasks running at 112 MHz must pause or migrate to lower-priority contexts during security operations, requiring careful scheduling in safety-critical firmware.

What is the GPIO count and analog input capability of FS32K142MRT0CLHR in its 48-pin LQFP package?

In the 48-pin LQFP package, FS32K142MRT0CLHR provides 43 GPIOs with interrupt capability. It supports up to 32 analog input channels across two independent 12-bit SAR ADC modules (ADC0 and ADC1), each capable of 1 Msps sampling with hardware triggers from LPIT or PDB - sufficient for multi-sensor acquisition in automotive body control applications.