NXP Semiconductors FS32K146HRT0VMHT

Overview

FS32K146HRT0VMHT from NXP Semiconductors is an automotive-grade 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 ECC-protected flash, 256 KB SRAM with ECC, and supports -40 °C to 125 °C ambient operation. It integrates FlexCAN with optional CAN-FD, LPUART/LIN, LPSPI, and CSEc cryptographic engine - deployed in body control modules and battery management systems.

For engineers reviewing the FS32K146HRT0VMHT datasheet, FS32K146HRT0VMHT pinout, FS32K146HRT0VMHT application, or FS32K146HRT0VMHT equivalent, key selection criteria include ASIL-B capable power modes (HSRUN/RUN/STOP/VLPR/VLPS), dual 12-bit ADCs with 32-channel support, FlexTimer channel count (up to 64), CSEc security execution constraints, and package-specific I/O availability (100-pin LQFP).

Technical Context

The FS32K146HRT0VMHT implements a dual-core-capable architecture with Arm Cortex-M4F core (Armv7, Thumb-2 ISA) and integrated DSP/FPU, enabling deterministic real-time signal processing. Its clock system includes SOSC (4–40 MHz), FIRC (48 MHz), SIRC (8 MHz), LPO (128 kHz), and SPLL supporting up to 112 MHz - with strict mode-dependent frequency limits: HSRUN mode disables CSEc and EEPROM operations, requiring switch to 80 MHz RUN mode for secure writes.

Power management relies on the PMC with five low-power modes and hardware-enforced memory protection via NXP's system MPU (not Arm Core MPU), which enforces access rights per master (Core, DMA, Ethernet) at the AXBS-Lite crossbar level. Analog subsystems include two 12-bit SAR ADCs (1 Msps), one CMP with 8-bit DAC, and dedicated TRGMUX for precise peripheral synchronization.

Key Specifications

Pinout & Package

FS32K146HRT0VMHT is packaged in a 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments are defined in the S32K1xx Reference Manual IO Signal Description sheets; this package supports up to 81 GPIOs, 3x FlexCAN, 3x LPUART, 3x LPSPI, 2x LPI2C, 2x ADC modules, and all core debug interfaces (SWD/JTAG).

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K146HRT0VMHT, S32K148HRT0VMHT adds Ethernet and audio interfaces at identical pinout and thermal rating, while S32K144HRT0VMHT reduces flash/SRAM and removes one ADC - both maintain full CAN-FD, CSEc, and ASIL-B power mode support for seamless integration into existing 100-pin LQFP layouts.

Availability

FS32K146HRT0VMHT is available at Aetrix Electronics and suitable for automotive body control, electric power steering, and battery management systems requiring stable component supply across extended product lifecycles and AEC-Q100-compliant manufacturing.

Supply support for FS32K146HRT0VMHT 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, and IoT applications, delivering secure, energy-efficient, and scalable silicon solutions backed by comprehensive software ecosystems.

The S32K1xx family is NXP's automotive-qualified Arm Cortex-M MCU platform targeting ASIL-B functional safety compliance, with FS32K146HRT0VMHT optimized for mid-tier real-time control in powertrain, chassis, and electrification systems.

FAQ

What is the maximum operating frequency of the FS32K146HRT0VMHT and under what conditions?

The FS32K146HRT0VMHT operates at up to 112 MHz in HSRUN mode, but this mode prohibits CSEc security operations and EEPROM writes/erases. For those functions, the device must switch to RUN mode at 80 MHz. The 112 MHz frequency is validated across -40 °C to +125 °C ambient and requires stable 2.7–5.5 V supply with proper decoupling per AN5032.

Does the FS32K146HRT0VMHT support CAN-FD, and how many instances are available?

Yes, the FS32K146HRT0VMHT integrates three FlexCAN modules, all supporting CAN-FD per ISO 11898-1 CD. Each module is independently configurable for classic CAN or CAN-FD frame formats, with programmable bit rates up to 5 Mbps in FD mode. All three are accessible in the 100-pin LQFP package used by FS32K146HRT0VMHT.

What memory protection mechanisms does the FS32K146HRT0VMHT implement for functional safety?

The FS32K146HRT0VMHT implements NXP's system MPU at the AXBS-Lite crossbar switch level - assigning per-master (CPU, DMA, Ethernet) access rights to memory regions. It also includes ECC on 2 MB flash and 256 KB SRAM, CRC module for data integrity checks, and internal/external watchdogs (WDOG/EWM). These features collectively support ASIL-B compliance per ISO 26262.

Can the FS32K146HRT0VMHT execute cryptographic operations while running at 112 MHz?

No. The FS32K146HRT0VMHT triggers error flags if CSEc (Cryptographic Services Engine) operations are attempted in HSRUN mode (112 MHz). To execute AES, SHA, or secure boot functions, the device must first transition to RUN mode (80 MHz). This restriction is hardware-enforced and documented in the S32K1xx Data Sheet Rev. 15.

What is the ADC resolution and channel count supported by the FS32K146HRT0VMHT?

The FS32K146HRT0VMHT includes two independent 12-bit SAR ADC modules, each supporting up to 32 analog input channels (64 total). Conversion rate is up to 1 Msps per module. Inputs are multiplexed with GPIO and other peripherals; full channel availability depends on pin assignment in the 100-pin LQFP package.