NXP Semiconductors FS32K146HRT0VLHR

Overview

FS32K146HRT0VLHR from NXP Semiconductors is an automotive-grade Arm Cortex-M4F microcontroller with 2 MB flash, 256 KB SRAM (both with ECC), and dual 12-bit ADCs. It operates at up to 112 MHz in HSRUN mode (−40 °C to +105 °C) and supports CAN-FD, FlexCAN, LPUART/LIN, LPSPI, and CSEc security engine. It is used in body control modules requiring functional safety up to ASIL-B.

For engineers reviewing the FS32K146HRT0VLHR datasheet, FS32K146HRT0VLHR pinout, FS32K146HRT0VLHR application, or FS32K146HRT0VLHR equivalent, key selection considerations include its 100-pin LQFP package, HSRUN/RUN power mode switching for CSEc/EEPROM operations, 156 GPIO capability, IEEE-1588 Ethernet readiness, and ASIL-B–capable system MPU and ECC memory protection.

Technical Context

The FS32K146HRT0VLHR implements a dual-core capable architecture with Arm Cortex-M4F core (112 MHz HSRUN / 80 MHz RUN) and integrated FPU, DSP, NVIC, and debug infrastructure (SWJ-DP, ITM, DWT, TPIU). Its clock system includes SOSC (4–40 MHz), FIRC (48 MHz), SIRC (8 MHz), LPO (128 kHz), and SPLL (up to 112 MHz).

Power management uses PMC with five modes (HSRUN, RUN, STOP, VLPR, VLPS); CSEc or EEPROM writes require explicit transition from HSRUN to RUN mode (80 MHz). Memory subsystem includes 2 MB program flash with ECC, 64 KB FlexNVM with EEPROM emulation, 256 KB SRAM with ECC, and 4 KB FlexRAM configurable as SRAM or EEPROM.

Key Specifications

Pinout & Package

FS32K146HRT0VLHR is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per I/O multiplexing configuration and support up to 156 GPIOs across all package variants - this specific variant implements 100 pins with full peripheral mapping including CAN-FD transceivers, ADC inputs, FlexIO pins, and dedicated debug (SWD) signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K146HRT0VLHR, S32K144HRT0VLHR reduces memory and peripheral count while maintaining pin compatibility for simpler designs, whereas S32K148HRT0VLHR adds Ethernet and SAI but requires larger packaging or different footprint - making FS32K146HRT0VLHR the optimal balance of memory, CAN-FD, safety, and 100-pin LQFP integration for mid-tier automotive ECUs.

Availability

FS32K146HRT0VLHR is available at Aetrix Electronics and suitable for body control modules, electric power steering systems, and ADAS sensor hubs requiring stable component supply, long-term automotive lifecycle support, and ASIL-B compliance.

Supply support for FS32K146HRT0VLHR 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, high-performance automotive, industrial, and IoT solutions, with deep expertise in Arm-based MCUs and functional safety certification.

The S32K1xx family - including FS32K146HRT0VLHR - was designed specifically for automotive electronic control units demanding ASIL-B compliance, robust security (CSEc), and seamless integration of CAN-FD, Ethernet, and mixed-signal peripherals in compact LQFP packages.

FAQ

What is the maximum operating frequency of the FS32K146HRT0VLHR and under which conditions?

The FS32K146HRT0VLHR achieves up to 112 MHz in HSRUN mode, guaranteed over −40 °C to +105 °C ambient temperature. In RUN mode, it operates at up to 80 MHz - required for CSEc cryptographic operations and FlexNVM EEPROM emulation. Both modes support full peripheral functionality except that CSEc and EEPROM writes are prohibited in HSRUN mode per device specification.

Does the FS32K146HRT0VLHR support CAN-FD, and how many instances are available?

Yes, the FS32K146HRT0VLHR integrates three independent FlexCAN modules, all supporting CAN-FD (ISO 11898-1). Each module can operate in classical CAN or CAN-FD mode with programmable bit rates, flexible data payloads, and built-in message filtering. External CAN transceivers are required for physical layer interfacing.

What memory protection mechanisms does the FS32K146HRT0VLHR provide for functional safety?

The FS32K146HRT0VLHR implements a system-level Memory Protection Unit (MPU) at the crossbar switch, enforcing access rights per master (CPU, DMA, Ethernet). It also features Error-Correcting Code (ECC) on both 2 MB flash and 256 KB SRAM to detect and correct single-bit errors - critical for ASIL-B compliance. These mechanisms are hardware-enforced and documented in the S32K1xx Reference Manual.

Is the FS32K146HRT0VLHR pin-compatible with other S32K1xx devices in the same package?

Yes - all S32K1xx devices sharing the 100-pin LQFP package (e.g., S32K144HRT0VLHR, S32K146HRT0VLHR, S32K148HRT0VLHR in 100-pin variant) are pin-to-pin compatible per NXP's documentation. Peripheral availability depends on I/O multiplexing configuration, but pin numbering, power, ground, and debug signals remain identical across the family.

What development tools and IDEs are officially supported for the FS32K146HRT0VLHR?

NXP officially supports FS32K146HRT0VLHR with S32 Design Studio (based on Eclipse and GCC), IAR Embedded Workbench, Green Hills MULTI, Arm Keil MDK, and Lauterbach TRACE32. SDKs include S32 SDK v3.x with drivers, RTOS abstraction (FreeRTOS), and safety libraries certified to ISO 26262 ASIL-B. Hardware tools include S32K146EVB evaluation board and S32DS debugger probes.