NXP Semiconductors S32K324EHT1MMMSR

Overview

S32K324EHT1MMMSR from NXP Semiconductors is an ASIL-B dual-core Arm Cortex-M7 automotive MCU operating up to 160 MHz, featuring 4 MB ECC-protected program flash, 512 KB ECC SRAM (including 192 KB TCM), and integrated QuadSPI interface supporting up to 480 Mbps for external memory expansion. It delivers real-time control in body electronics, gateway modules, and chassis systems requiring functional safety and CAN FD connectivity.

For engineers reviewing the S32K324EHT1MMMSR datasheet, S32K324EHT1MMMSR pinout, S32K324EHT1MMMSR application, or S32K324EHT1MMMSR equivalent, key selection factors include dual-core lockstep readiness, 6 FlexCAN channels with CAN FD support, Ethernet AVB/TSN capability, and hardware security engine (HSE_B) compatibility-critical for automotive domain controllers and safety-critical ECU designs.

Technical Context

The S32K324EHT1MMMSR implements two independent Arm Cortex-M7 cores at 160 MHz each, with separate I/D caches and tightly coupled memory (TCM) to minimize latency in fast control loops. Its cross-triggering architecture integrates BCTU, eMIOS timers, ADCs, and LCU for deterministic sensor-to-actuator timing in motor control and battery management.

Power management uses a centralized PMC with RUN/STANDBY modes and peripheral-specific clock gating, while safety is enforced via ECC on all memories, CRC modules, dual SWT timers, XRDC access control, and ASIL-B-compliant fault collection and control unit (FCCU). The HSE_B supports AES acceleration but is not enabled on this variant per documentation.

Key Specifications

Pinout & Package

Package: MAPBGA437 (17 × 17 mm, 0.8 mm pitch) with exposed thermal pad - optimized for thermal dissipation in compact automotive ECUs and supports automated optical inspection (AOI).

Key Features

Applications

Equivalent & Alternatives

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

Compared with S32K324EHT1MMMSR, the S32K344EHT1MMMSR provides certified ASIL-D fault containment while maintaining identical peripherals and software stack, whereas the S32K328EHT1MMMSR trades safety certification for raw compute bandwidth and memory headroom - enabling future-proofing without architectural overhaul.

Availability

S32K324EHT1MMMSR is available at Aetrix Electronics and suitable for automotive body control modules, electric power steering systems, and vehicle gateway applications requiring stable component supply, long-term lifecycle support, and ASIL-B compliance.

Supply support for S32K324EHT1MMMSR 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, with deep expertise in functional safety, security, and real-time processing.

The S32K3xx product line targets automotive electronic control units requiring ASIL-B/D compliance, deterministic real-time performance, and integrated networking - designed specifically for body, chassis, and gateway systems in electrified vehicles.

FAQ

What is the maximum operating frequency of the S32K324EHT1MMMSR?

The S32K324EHT1MMMSR features two independent Arm Cortex-M7 cores, each operating at up to 160 MHz. This frequency is supported across the full −40 °C to +125 °C ambient temperature range and 2.97 V to 5.5 V supply voltage, with no derating required. The S32K324EHT1MMMSR achieves deterministic real-time response through zero-wait-state TCM RAM and hardware-accelerated instruction/data caching.

Does the S32K324EHT1MMMSR support CAN FD?

Yes, the S32K324EHT1MMMSR integrates six FlexCAN modules, all supporting CAN FD with bit rates up to 5 Mbps and payload lengths up to 64 bytes. Each module includes dedicated message buffers, FIFOs, and hardware timestamping - enabling concurrent high-bandwidth communication across powertrain, chassis, and body domains without CPU intervention.

What package type is used for the S32K324EHT1MMMSR?

The S32K324EHT1MMMSR is supplied in a MAPBGA437 package (17 mm × 17 mm, 0.8 mm pitch) with an exposed thermal pad. This package supports high-density automotive PCB layouts, provides efficient thermal dissipation for sustained 160 MHz operation, and is compatible with standard reflow profiles and AOI inspection systems.

Is hardware security engine (HSE_B) active on the S32K324EHT1MMMSR?

The S32K324EHT1MMMSR includes the HSE_B block in silicon, but AES/RSA/ECC acceleration firmware is not preloaded or enabled by default. Unlike S32K388/K389 variants, this device requires external provisioning and firmware loading to activate cryptographic functions - making it suitable for applications where security is implemented at the software stack level.

How does the S32K324EHT1MMMSR handle functional safety compliance?

The S32K324EHT1MMMSR meets ISO 26262 ASIL-B requirements through integrated hardware safety mechanisms: ECC on all memories, dual independent software watchdog timers (SWT), fault collection and control unit (FCCU), clock/voltage monitors, and memory built-in self-test (MBIST). These features eliminate the need for external safety monitors in most body and chassis applications.