NXP Semiconductors S912XEQ384F1VAGR

Overview

S912XEQ384F1VAGR from NXP Semiconductors (formerly Freescale) is a 16-bit automotive microcontroller featuring the CPU12X core, 384 KB on-chip Flash memory with ECC, 24 KB RAM, and integrated MSCAN, XGATE co-processor, and enhanced ATD. It delivers deterministic real-time control in body electronics modules requiring CAN/LIN communication, PWM-driven actuators, and sensor signal acquisition at -40°C to 125°C ambient.

For engineers reviewing the S912XEQ384F1VAGR datasheet, S912XEQ384F1VAGR pinout, S912XEQ384F1VAGR application, or S912XEQ384F1VAGR equivalent, key selection criteria include its 144-pin LQFP package, dual ATD converters (8/10/12-bit, 16-channel), 6 MSCAN modules, XGATE coprocessor running at 100 MIPS, and Memory Protection Unit (MPU) for ASIL-B–capable system integrity.

Technical Context

The S912XEQ384F1VAGR implements a 16-bit CPU12X core with full MC9S12 instruction set compatibility (excluding five fuzzy instructions), 50 MHz bus frequency, and supervisor/user mode execution control. Its MPU defines eight address regions with 8-byte granularity, enforcing no-write/no-execute attributes and triggering non-maskable interrupts on violations.

System timing relies on an IPLL with spread-spectrum capability and an OSC_LCP supporting 4–16 MHz crystals; the XGATE co-processor operates at 100 MHz, independently servicing MSCAN, SCI, and SPI modules to offload the CPU. The device supports FULL-CAN operation via XGATE-managed mailbox handling and LIN master/slave functionality using integrated SCI peripherals.

Key Specifications

Pinout & Package

144-pin LQFP package (case no 918-03), 20 mm × 20 mm body, 0.5 mm pitch, exposed thermal pad. Pinout validated per MC9S12XE Data Sheet Rev. 7 and Freescale Application Note AN3802.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S912XEQ384F1VAGR, MC9S12XEP100MAG offers greater memory and I/O but requires board-level redesign, while S912XEQ512F1VAGR provides seamless Flash scalability within the same footprint and toolchain.

Availability

S912XEQ384F1VAGR is available at Aetrix Electronics and suitable for automotive body control modules, vehicle gateways, seat/mirror ECUs, and roof module controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for S912XEQ384F1VAGR 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 highly integrated solutions.

The S12XE family was designed specifically for automotive body electronics demanding ASIL-B–level system integrity, combining 16-bit efficiency with 32-bit-like peripheral richness and robust memory protection-exemplified by the S912XEQ384F1VAGR.

FAQ

What is the maximum bus frequency supported by the S912XEQ384F1VAGR?

The S912XEQ384F1VAGR supports a maximum CPU bus frequency of 50 MHz and an XGATE bus frequency of 100 MHz. This allows deterministic real-time execution of safety-critical tasks while enabling high-throughput peripheral handling via the co-processor. The IPLL clock generator provides stable multiplication without external components, and the CRG module supports spread-spectrum modulation to reduce EMC emissions. All timing specifications are validated across the full -40°C to 125°C operating range.

Does the S912XEQ384F1VAGR include hardware memory protection?

Yes, the S912XEQ384F1VAGR integrates a Memory Protection Unit (MPU) that defines up to eight address regions with 8-byte granularity. Each region supports no-write and no-execute attributes, and violations trigger a non-maskable interrupt-enabling ASIL-B–compliant partitioning of safety-critical and non-critical software tasks. This MPU is active in both supervisor and user modes and is initialized at reset using Flash-based option bits, ensuring consistent behavior across power cycles.

How many CAN interfaces does the S912XEQ384F1VAGR support, and what protocol versions are implemented?

The S912XEQ384F1VAGR supports six MSCAN modules compliant with CAN 2.0A and 2.0B protocols, including standard and extended identifier frames and programmable bit rates up to 1 Mbps. Each module includes five receive buffers with FIFO storage, three prioritized transmit buffers, and flexible acceptance filtering (2×32-bit, 4×16-bit, or 8×8-bit). FULL-CAN operation is enabled when used with the XGATE co-processor, allowing autonomous mailbox management and zero-CPU-intervention message handling.

What analog-to-digital capabilities does the S912XEQ384F1VAGR provide?

The S912XEQ384F1VAGR integrates two independent ATD converters with 8/10/12-bit resolution, a 16-channel analog multiplexer, and 3 µs 10-bit conversion time. Each converter supports left/right-aligned and signed/unsigned results, external/internal trigger sources, and wake-up from STOP mode on analog comparison events. Internal oscillator support enables conversion during low-power states, and the dual-converter architecture allows simultaneous sampling of critical sensor pairs (e.g., voltage and current) for real-time diagnostics.

Is the S912XEQ384F1VAGR pin-compatible with other S12XE family members?

The S912XEQ384F1VAGR is pin-compatible with other 144-pin LQFP variants in the S12XE family-including S912XEQ512F1VAGR and S912XET256F1VAGR-sharing identical mechanical dimensions, pinout, and power/ground assignments. Peripheral mapping (e.g., MSCAN, SCI, ATD) remains consistent across these derivatives, enabling hardware reuse and firmware scalability. However, it is not pin-compatible with 208-pin MAPBGA or 112-pin LQFP variants due to differing package footprints and I/O allocations.