NXP Semiconductors FS32K146HRT0MLLR

Overview

FS32K146HRT0MLLR from NXP Semiconductors is an automotive-grade 32-bit Arm Cortex-M4F microcontroller with 2 MB flash, 256 KB SRAM (both with ECC), 112 MHz HSRUN/80 MHz RUN operation, and integrated CSEc security engine. It features dual 12-bit ADCs (32-channel total), three FlexCAN modules (CAN-FD capable), and operates from -40 °C to +125 °C for engine control unit (ECU) applications.

For engineers reviewing the FS32K146HRT0MLLR datasheet, FS32K146HRT0MLLR pinout, FS32K146HRT0MLLR application, or FS32K146HRT0MLLR equivalent, this page delivers verified specifications, package mapping to 100-pin LQFP, functional pin definitions, safety-critical timing behavior, and validated alternative parts for ASIL-B automotive designs.

Technical Context

The FS32K146HRT0MLLR implements a dual-core execution environment via Arm Cortex-M4F core with FPU and DSP extensions, supporting deterministic real-time control in HSRUN (112 MHz) and energy-efficient RUN (80 MHz) modes. Its clock system integrates SPLL (up to 112 MHz), FIRC (48 MHz), SIRC (8 MHz), and LPO (128 kHz), with configurable gating per peripheral domain.

Memory architecture includes ECC-protected 2 MB program flash, 64 KB FlexNVM (with EEPROM emulation), 256 KB SRAM, and 4 KB FlexRAM - all managed by NXP's system MPU at the AXBS-Lite crossbar level. Safety mechanisms include CRC, WDOG, EWM, and CSEc cryptographic acceleration compliant with SHE specification.

Key Specifications

Pinout & Package

FS32K146HRT0MLLR is packaged in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, with thermal pad exposed on bottom. Pinout supports full I/O multiplexing across 156 GPIOs (package-limited to 100 pins), including dedicated CAN-FD transceiver interfaces, ADC analog inputs, and SWD debug signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K146HRT0MLLR, S32K144HRT0MLLR reduces memory and CAN count for lower-cost ECUs, while S32K148HRT0MLLR adds Ethernet and audio for centralized domain control - neither is pin-compatible without layout revision due to differing peripheral pin allocations in 100-pin LQFP.

Availability

FS32K146HRT0MLLR is available at Aetrix Electronics and suitable for engine control units, brake control modules, electric power steering systems, and battery management systems requiring stable component supply across automotive production lifecycles.

Supply support for FS32K146HRT0MLLR 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 focused on automotive, industrial, IoT, and communication infrastructure solutions, with deep expertise in functional safety and security.

The S32K1xx family is designed specifically for automotive electronic control units requiring ASIL-B compliance, robust EMC performance, and long-term reliability in harsh environments - FS32K146HRT0MLLR represents the mid-tier performance variant optimized for powertrain and chassis applications.

FAQ

What is the maximum operating frequency of the FS32K146HRT0MLLR and under which conditions?

The FS32K146HRT0MLLR achieves 112 MHz in HSRUN mode and 80 MHz in RUN mode. HSRUN requires VDD ≥ 2.7 V and ambient temperature ≤ 105 °C; RUN mode supports full -40 °C to +125 °C range. CSEc security operations and EEPROM writes must occur in RUN mode only, as documented in the S32K1xx Data Sheet Rev. 15.

Does the FS32K146HRT0MLLR support CAN-FD, and how many instances are available?

Yes, the FS32K146HRT0MLLR integrates three independent FlexCAN modules, each supporting CAN-FD per ISO 11898-1 with data rates up to 5 Mbps. All three modules are accessible in the 100-pin LQFP package, with dedicated TX/RX pins mapped to separate port groups for noise isolation in automotive harnesses.

What memory protection mechanisms are implemented in the FS32K146HRT0MLLR?

The FS32K146HRT0MLLR uses NXP's system MPU at the AXBS-Lite crossbar switch level to enforce memory access rights per master (CPU, DMA, Ethernet). It also includes ECC on 2 MB flash and 256 KB SRAM, CRC module for data integrity checks, and a configurable watchdog (WDOG) with windowed mode - all required for ASIL-B compliance.

Can the FS32K146HRT0MLLR execute secure boot and cryptographic operations at full speed?

No - CSEc (Cryptographic Services Engine) operations including secure boot, AES encryption, and key provisioning are prohibited in HSRUN mode (112 MHz). The FS32K146HRT0MLLR must transition to RUN mode (80 MHz) to execute any CSEc command or FlexNVM write/erase, as explicitly stated in multiple sections of the S32K1xx Data Sheet Rev. 15.

What is the ADC configuration supported by the FS32K146HRT0MLLR?

The FS32K146HRT0MLLR includes two independent 12-bit SAR ADC modules, each supporting up to 32 analog input channels (64 total), with 1 Msps conversion rate per module. Each ADC has its own trigger mux (TRGMUX), calibration registers, and supports hardware averaging - enabling synchronous sampling for motor control and engine sensing.