NXP Semiconductors FS32K146UAT0VLLR

Overview

FS32K146UAT0VLLR 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 operation, and integrated CSEc security engine. It features dual 12-bit ADCs (32-channel total), three FlexCAN modules (CAN-FD capable), and operates across -40 °C to +105 °C for body control module and powertrain sensor interface applications.

For engineers reviewing the FS32K146UAT0VLLR datasheet, FS32K146UAT0VLLR pinout, FS32K146UAT0VLLR application, or FS32K146UAT0VLLR equivalent, key selection considerations include its VLLR 100-pin LQFP package, HSRUN/RUN mode switching requirement for CSEc/EEPROM operations, CAN-FD timing compliance, and ASIL-B functional safety capability per ISO 26262.

Technical Context

The FS32K146UAT0VLLR implements a dual-core architecture with Arm Cortex-M4F (primary) and Cortex-M0+ (auxiliary) execution units, supporting concurrent real-time control and safety monitoring. Its clock system integrates SPLL (up to 112 MHz), FIRC (48 MHz), SIRC (8 MHz), and LPO (128 kHz), with configurable phase-locked loop dividers enabling precise timing for CAN-FD bit rate synthesis and RTC synchronization.

Power management includes five operational modes (HSRUN, RUN, STOP, VLPR, VLPS), where HSRUN enables maximum performance at 112 MHz but disables CSEc and EEPROM write/erase - requiring explicit transition to RUN mode (80 MHz) for secure operations. Memory protection uses NXP's system MPU at the crossbar switch level, enforcing access rights for core, DMA, and Ethernet masters independently.

Key Specifications

Pinout & Package

FS32K146UAT0VLLR is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per the S32K14x IO Signal Description multiplexing sheet; all pins support 5 V-tolerant inputs and configurable pull-up/down resistors.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K146UAT0VLLR, S32K148UAT0VLLR adds Ethernet/SAI at higher cost and power, while S32K144UAT0VLLR reduces flash/SRAM and ADC/FlexCAN count - making FS32K146UAT0VLLR the balanced choice for CAN-FD gateways and EPS controllers requiring full 2 MB code space and dual ADC concurrency.

Availability

FS32K146UAT0VLLR is available at Aetrix Electronics and suitable for automotive body control modules, electric power steering systems, battery management units, and zonal gateway applications requiring stable component supply across extended product lifecycles.

Supply support for FS32K146UAT0VLLR 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 certification.

The S32K1xx family targets automotive electronic control units requiring ASIL-B compliance, featuring integrated safety mechanisms, cryptographic acceleration, and robust EMC performance for under-hood deployment.

FAQ

What is the maximum operating frequency of the FS32K146UAT0VLLR and under what conditions?

The FS32K146UAT0VLLR achieves 112 MHz in HSRUN mode with 2.7–5.5 V supply and ambient temperature ≤105 °C. Operation above 80 MHz disables CSEc and EEPROM write/erase functions - these require transition to RUN mode (80 MHz). The device must remain within absolute max ratings (e.g., VDD ≤5.8 V for ≤60 s cumulative) to ensure reliability.

Does the FS32K146UAT0VLLR support CAN-FD, and how many instances are available?

Yes, the FS32K146UAT0VLLR integrates three FlexCAN modules, each supporting CAN-FD per ISO 11898-1 with data phase rates up to 5 Mbps. All three modules are accessible in the 100-pin LQFP package (VLLR), with dedicated TX/RX pins routed to separate CAN transceivers for multi-bus architectures like chassis and powertrain domains.

What memory protection mechanisms does the FS32K146UAT0VLLR implement for functional safety?

The FS32K146UAT0VLLR employs NXP's system MPU at the crossbar switch level, assigning independent read/write/execute permissions to each memory region for core, DMA, and Ethernet masters. Combined with ECC on 2 MB flash and 256 KB SRAM, CRC module, and dual watchdogs (WDOG + EWM), it satisfies ASIL-B requirements per ISO 26262 without external safety monitors.

Can the FS32K146UAT0VLLR execute secure boot and cryptographic operations simultaneously with real-time control tasks?

No - CSEc (Cryptographic Services Engine) operations including secure boot, AES encryption, and key derivation must be executed in RUN mode (80 MHz), not HSRUN mode (112 MHz). Attempting CSEc or EEPROM writes/erase in HSRUN triggers error flags. Real-time control tasks should run in HSRUN, while security operations require coordinated mode switching via PMC registers.

What is the ADC configuration of the FS32K146UAT0VLLR, and how many channels are usable in the 100-pin LQFP package?

The FS32K146UAT0VLLR contains two independent 12-bit SAR ADCs, each supporting up to 16 analog inputs (32 total). In the 100-pin LQFP package, all 32 channels are physically accessible via dedicated ADC input pins or GPIO multiplexing, enabling simultaneous sampling of motor phase currents, battery voltages, and temperature sensors with 1 Msps aggregate throughput.