NXP Semiconductors FS32K146HAT0VMHR

Overview

FS32K146HAT0VMHR 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 supports CAN-FD, FlexCAN, LPUART/LIN, LPSPI, LPI2C, FlexIO, and dual 12-bit ADCs - deployed in vehicle body control modules requiring ASIL-B functional safety compliance.

For engineers reviewing the FS32K146HAT0VMHR datasheet, FS32K146HAT0VMHR pinout, FS32K146HAT0VMHR application, or FS32K146HAT0VMHR equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options for automotive ECU design, safety-critical firmware development, and secure over-the-air update implementation.

Technical Context

The FS32K146HAT0VMHR implements a dual-core execution environment via Arm Cortex-M4F (primary) and M0+ (auxiliary) with tightly coupled FPU, DSP extensions, and configurable NVIC. Its clock architecture integrates SPLL (up to 112 MHz), FIRC (48 MHz), SIRC (8 MHz), and LPO (128 kHz), enabling dynamic mode switching between HSRUN, RUN, STOP, VLPR, and VLPS.

Power management relies on the PMC with hardware-enforced mode transitions, while memory protection uses NXP's system MPU at the AXBS-Lite crossbar level - not Arm Core MPU - granting per-master access rights to flash, SRAM, and peripheral regions. CSEc cryptographic operations and EEPROM emulation require explicit transition from HSRUN (112 MHz) to RUN (80 MHz) mode.

Key Specifications

Pinout & Package

FS32K146HAT0VMHR is packaged in a 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) with exposed thermal pad. This package supports full I/O availability (up to 89 GPIOs), all three FlexCAN channels, dual ADC modules, and Ethernet interface signals when configured.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K148HAT0VLHR, FS32K146HAT0VMHR trades Ethernet/audio capability for extended temperature range (+125 °C vs. +105 °C) and integrated CSEc - making it preferred for under-hood applications needing security but not networking. Against FS32K144HAT0VLHR, it provides 2× flash, 33% more SRAM, and certified cryptographic services - critical for ASIL-B-compliant designs with field-upgradable firmware.

Availability

FS32K146HAT0VMHR is available at Aetrix Electronics and suitable for automotive body control, electric power steering, ADAS sensor hubs, and on-board charger controllers requiring stable component supply across extended temperature and long product lifecycles.

Supply support for FS32K146HAT0VMHR 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 MCU design.

The S32K1xx family - including FS32K146HAT0VMHR - was engineered specifically for ASIL-B automotive electronic control units, integrating safety mechanisms, security engines, and robust analog/mixed-signal peripherals into a scalable 32-bit Arm platform.

FAQ

What is the maximum operating frequency of the FS32K146HAT0VMHR and under which conditions?

The FS32K146HAT0VMHR operates at up to 112 MHz in HSRUN mode and 80 MHz in RUN mode. HSRUN mode requires VDD ≥ 2.7 V and ambient temperature ≤ +105 °C; RUN mode supports the full −40 °C to +125 °C range. CSEc security operations and EEPROM emulation must occur in RUN mode only - attempting them in HSRUN triggers error flags.

Does the FS32K146HAT0VMHR support CAN-FD, and how many CAN interfaces does it include?

Yes, the FS32K146HAT0VMHR includes three FlexCAN modules, each supporting CAN-FD per ISO 11898-1 with bit-rate switching up to 5 Mbps. All three channels are accessible in the 100-pin LQFP package and support loopback, self-test, and message RAM with hardware acceptance filtering.

What safety certifications and hardware features make the FS32K146HAT0VMHR suitable for ASIL-B applications?

The FS32K146HAT0VMHR incorporates ECC on flash and SRAM, system-level MPU with crossbar master access control, dual independent watchdogs (WDOG and EWM), CRC module, and lockstep-capable peripherals. These features collectively support ISO 26262 ASIL-B compliance when implemented per NXP's safety manual and S32K1xx Functional Safety Package.

How does the CSEc (Cryptographic Services Engine) function in the FS32K146HAT0VMHR, and what algorithms does it support?

The CSEc in FS32K146HAT0VMHR implements SHE-compliant cryptographic functions including AES-128 encryption/decryption, SHA-256 hashing, true random number generation (TRNG), and secure key provisioning. It operates independently of the CPU core and requires explicit mode transition to RUN (80 MHz) - it cannot execute in HSRUN (112 MHz) mode.

What is the pin-compatible upgrade path from the FS32K146HAT0VMHR to a higher-memory variant?

The FS32K148HAT0VLHR is pin-compatible with FS32K146HAT0VMHR in the 100-pin LQFP package and shares identical peripheral signal mapping. It upgrades flash to 2 MB (same as FS32K146HAT0VMHR) but doubles SRAM to 512 KB and adds 10/100 Mbps Ethernet MAC and dual SAI interfaces - ideal for future-proofing networked ECU designs.