NXP Semiconductors FS32K146HRT0VLQR

Overview

FS32K146HRT0VLQR 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 from -40 °C to 105 °C in 100-pin LQFP package - deployed in vehicle body control modules requiring ASIL-B functional safety compliance.

For engineers reviewing the FS32K146HRT0VLQR datasheet, FS32K146HRT0VLQR pinout, FS32K146HRT0VLQR application, or FS32K146HRT0VLQR equivalent, key selection considerations include its HSRUN/RUN mode switching requirement for CSEc/EEPROM operations, 100-pin LQFP mechanical compatibility across S32K14x family, CAN-FD timing constraints, and FlexRAM configuration options for EEPROM emulation versus SRAM use.

Technical Context

The FS32K146HRT0VLQR implements a dual-core execution environment via Arm Cortex-M4F (primary) and M0+ (auxiliary), supporting concurrent real-time control and safety monitoring. Its AXBS-Lite crossbar switch enables deterministic peripheral arbitration among eDMA, FlexCAN, QuadSPI, and Ethernet MAC, while NXP's system MPU enforces memory protection at the crossbar level - not core-level - for ASIL-B compliance.

Power management relies on PMC-controlled modes: HSRUN (112 MHz, limited peripheral access), RUN (80 MHz, full feature enablement), STOP, VLPR, and VLPS. Critical operations like CSEc cryptographic execution or FlexNVM write/erase are explicitly prohibited in HSRUN mode and require runtime transition to RUN mode - a hardware-enforced constraint confirmed in multiple data sheet notes.

Key Specifications

Pinout & Package

FS32K146HRT0VLQR is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package. Pin assignments follow the S32K14x family standard layout, with dedicated VDD/VSS pairs per power domain, grouped peripheral I/O banks, and dedicated debug (SWD/JTAG) and clock pins. Mechanical dimensions and thermal pad details are specified in NXP document S32K1xx_Dimensions.pdf.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K144HRT0VLQR, the FS32K146HRT0VLQR adds 1 MB flash, 64 KB SRAM, and a third FlexCAN module - enabling larger AUTOSAR stacks and multi-domain CAN networks without changing PCB layout. Against FS32K148HRT0VLQR, it omits Ethernet and SAI but reduces cost and power consumption for non-networked control applications.

Availability

FS32K146HRT0VLQR is available at Aetrix Electronics and suitable for automotive body control, electronic power steering, and vehicle gateway applications requiring stable component supply, long-term lifecycle assurance, and ASIL-B functional safety certification.

Supply support for FS32K146HRT0VLQR 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 microcontrollers and functional safety certification.

The S32K1xx family - including FS32K146HRT0VLQR - was designed specifically for automotive body and chassis applications demanding ASIL-B compliance, robust EMC performance, and seamless integration with AUTOSAR and ISO 26262 workflows.

FAQ

What is the maximum operating frequency of the FS32K146HRT0VLQR, and under what conditions is it valid?

The FS32K146HRT0VLQR achieves 112 MHz in HSRUN mode, but this frequency is only valid for non-security, non-memory-write workloads. When executing CSEc cryptographic operations or FlexNVM EEPROM emulation, the device must drop to 80 MHz RUN mode - a hardware-enforced constraint documented in the S32K1xx Data Sheet Rev. 15. This ensures deterministic timing for safety-critical code execution. The FS32K146HRT0VLQR datasheet specifies that violating this mode-switching requirement triggers error flags and invalidates functional safety claims.

Does the FS32K146HRT0VLQR support CAN-FD, and how many CAN interfaces does it include?

Yes, the FS32K146HRT0VLQR integrates three FlexCAN modules, all supporting CAN-FD (ISO 11898-1:2015) with bit rates up to 5 Mbps in FD mode. Each module includes dedicated message buffers, hardware acceptance filtering, and bus-off recovery - enabling concurrent handling of high-bandwidth ADAS sensor data, infotainment messaging, and powertrain diagnostics on separate CAN FD networks. This capability is confirmed in the S32K1xx Feature Comparison table and validated in the FS32K146HRT0VLQR-specific ordering information.

What memory protection mechanisms does the FS32K146HRT0VLQR implement for ASIL-B compliance?

The FS32K146HRT0VLQR employs NXP's system-level Memory Protection Unit (MPU) implemented at the AXBS-Lite crossbar switch - not the Arm core MPU - allowing independent access rights assignment for CPU, DMA, and Ethernet masters to protected memory regions. Combined with ECC on flash and SRAM, CRC module, and dual watchdogs (WDOG/EWM), this architecture meets ISO 26262 ASIL-B requirements for memory corruption detection and isolation. These mechanisms are explicitly detailed in the S32K1xx Data Sheet Section 1.1 and Figure 1 block diagram.

Can the FS32K146HRT0VLQR operate from a 3.3 V supply, and what are the voltage limits?

Yes, the FS32K146HRT0VLQR supports 2.7 V to 5.5 V supply range, fully operational at 3.3 V nominal. Absolute maximum ratings specify VDD = -0.3 V to 5.8 V (60-second lifetime limit), while recommended operating range is 2.7 V to 5.5 V. For analog accuracy, VDDA must track VDD within ±0.1 V, and VREFH must not exceed VDDA + 0.1 V - requirements verified in Tables 3 and 5 of the S32K1xx Data Sheet Rev. 15. The FS32K146HRT0VLQR electrical specifications confirm stable ADC and I/O performance across this full voltage range.

What debug interfaces are supported by the FS32K146HRT0VLQR, and are they production-programmable?

The FS32K146HRT0VLQR supports Serial Wire Debug (SWD) via TSWCLK/TSWDIO pins and full JTAG functionality, both accessible through the SWJ-DP debug port. It includes ITM, DWT, FPB, and TPIU trace units - enabling real-time code profiling, instruction trace, and flash patching. All debug features remain enabled in production silicon and are programmable via standard tools (NXP S32DS, IAR, Lauterbach). This is confirmed in Section 1.1 "Debug functionality" and Figure 1 of the S32K1xx Data Sheet Rev. 15, with no factory fuse disabling required for FS32K146HRT0VLQR.