NXP Semiconductors FS32K146HAT0MMHT

Overview

FS32K146HAT0MMHT from NXP Semiconductors is an automotive-grade 32-bit Arm Cortex-M4F microcontroller designed for real-time control in safety-critical ECUs. It operates at up to 112 MHz (HSRUN mode), features 2 MB program flash with ECC, 256 KB SRAM with ECC, and supports -40 °C to +125 °C ambient operation. Used in body control modules, battery management systems, and motor control units requiring ASIL-B compliance.

For engineers reviewing the FS32K146HAT0MMHT datasheet, FS32K146HAT0MMHT pinout, FS32K146HAT0MMHT application, or FS32K146HAT0MMHT equivalent, this page delivers verified specifications, package mapping, functional alternatives, and design-critical timing/security constraints - including mandatory RUN-mode execution for CSEc and EEPROM operations.

Technical Context

The FS32K146HAT0MMHT implements a dual-core capable architecture with Arm Cortex-M4F core (Armv7, Thumb-2 ISA) and integrated DSP, FPU, and NVIC. Its clock system includes SPLL (up to 112 MHz), FIRC (48 MHz), SIRC (8 MHz), LPO (128 kHz), and RTC_CLKIN (32 kHz), enabling precise low-power and high-performance mode switching.

Power management is handled by the PMC supporting five modes: HSRUN, RUN, STOP, VLPR, VLPS - with strict operational restrictions: CSEc cryptographic operations and FlexNVM EEPROM emulation are prohibited in HSRUN mode and require transition to 80 MHz RUN mode. Memory subsystem includes ECC-protected flash/SRAM, QuadSPI with HyperBus™ support, and FlexRAM configurable as SRAM or EEPROM emulation.

Key Specifications

Pinout & Package

FS32K146HAT0MMHT is packaged in a 100-pin LQFP (14 × 14 mm, 0.5 mm pitch), pin-compatible with other S32K14x devices in the same package variant. This package supports full peripheral availability including three FlexCAN interfaces (with CAN-FD), dual 12-bit ADCs (32-channel total), and 156 GPIOs (pin-count dependent on package).

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K144HAT0MLHT, FS32K146HAT0MMHT delivers 1 MB more flash and 64 KB more SRAM for complex firmware and logging - while FS32K148HAT0MLHT adds Ethernet/SAI at higher cost and power. FS32K146HAT0MMHT remains the preferred choice for ASIL-B control units needing headroom without over-engineering.

Availability

FS32K146HAT0MMHT is available at Aetrix Electronics and suitable for body control modules, battery management systems, and electric power steering applications requiring stable component supply across automotive production lifecycles.

Supply support for FS32K146HAT0MMHT 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 Arm-based MCUs and functional safety.

The S32K1xx family - including FS32K146HAT0MMHT - was engineered specifically for automotive electronic control units demanding ASIL-B compliance, robust security, and real-time determinism in harsh environments.

FAQ

What is the maximum operating frequency of the FS32K146HAT0MMHT, and under what conditions is it valid?

The FS32K146HAT0MMHT achieves up to 112 MHz in HSRUN mode, validated across -40 °C to +125 °C ambient temperature. However, this frequency is restricted: CSEc cryptographic operations and FlexNVM EEPROM emulation are disabled in HSRUN mode and require switching to 80 MHz RUN mode. The device must be configured accordingly in software to avoid error flag assertion during security or data storage routines.

Does the FS32K146HAT0MMHT support CAN-FD, and how many interfaces are available?

Yes, the FS32K146HAT0MMHT integrates three FlexCAN modules, each supporting CAN-FD per ISO 11898-1 CD, with bit rates up to 5 Mbps in FD mode. All three interfaces are fully accessible in the 100-pin LQFP package and support message filtering, FIFO buffering, and loopback self-test - essential for domain controller and gateway applications requiring high-bandwidth inter-domain communication.

What safety certifications and hardware features does the FS32K146HAT0MMHT include for ASIL-B compliance?

The FS32K146HAT0MMHT includes hardware-enforced safety mechanisms required for ASIL-B: System MPU for memory region protection, ECC on 2 MB flash and 256 KB SRAM, CRC acceleration module, dual watchdogs (WDOG and EWM), and lockstep-capable peripherals. It is qualified per AEC-Q100 Grade 1 and supports ISO 26262 tool qualification documentation - enabling certified safety element out of context (SEooC) integration into larger automotive systems.

Can the FS32K146HAT0MMHT execute secure boot and firmware updates, and what cryptographic capabilities are built-in?

Yes, the FS32K146HAT0MMHT includes the Cryptographic Services Engine (CSEc), compliant with the SHE specification. It supports AES-128 encryption/decryption, SHA-256 hashing, true random number generation (TRNG), and secure key storage. These capabilities enable authenticated secure boot, encrypted firmware updates, and runtime attestation - all executed in hardware without exposing keys to software, ensuring robust protection against cloning and tampering.

What is the supported voltage range and power mode behavior of the FS32K146HAT0MMHT?

The FS32K146HAT0MMHT operates from 2.7 V to 5.5 V, compatible with 12 V automotive battery systems including cranking conditions. It supports five power modes: HSRUN (112 MHz), RUN (80 MHz), STOP, VLPR, and VLPS. Notably, CSEc and EEPROM operations are prohibited in HSRUN mode and require explicit transition to RUN mode - a hardware-enforced constraint documented in the datasheet to prevent concurrent high-speed execution and memory write conflicts.