NXP Semiconductors S912XET256J2CAL

Overview

S912XET256J2CAL from NXP Semiconductors (formerly Freescale) is a 16-bit HCS12X microcontroller featuring a 256 KB on-chip flash memory, 14 KB RAM, and an S12X CPU core running at up to 50 MHz. It integrates dual CAN 2.0B controllers, 12-bit ADC with 16 channels, 8-channel PWM, and XGATE co-processor for offloading real-time tasks. Designed for automotive body electronics and industrial control systems requiring deterministic timing and functional safety support.

For engineers reviewing the S912XET256J2CAL datasheet, S912XET256J2CAL pinout, S912XET256J2CAL application, or S912XET256J2CAL equivalent, this page delivers verified technical context, package mapping, validated pin functions, and real-world use cases aligned with S12XE family documentation Rev. 1.25 and Freescale ordering information.

Technical Context

The S912XET256J2CAL implements the S12X CPU12XV2 core with enhanced instruction set, 24-bit addressing, and background debug module (BDM) support. It uses a modular peripheral architecture including ECT, TIM, MSCAN, SPI, SCI, IIC, and ADC12B16C modules-all documented in the MC9S12XE-Family Reference Manual Rev. 1.25.

It supports multiple clock sources: internal VCO-based PLL (up to 50 MHz), external crystal (1–32 MHz), and RC oscillator. Memory protection unit (MPU), voltage regulator (3.3 V), and security features (flash protection, BDM disable) are integrated per S12XE derivative specifications.

Key Specifications

Pinout & Package

Package: 112-pin LQFP (16 × 16 mm, 0.4 mm pitch), thermally enhanced with exposed thermal pad (EP). Pinout conforms to S12XE family standard layout as defined in Appendix B (Package Information) and Section 1.2.1 (Device Pinout) of MC9S12XE-Family Reference Manual Rev. 1.25.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S12XEP100MAL, the S912XET256J2CAL provides 2.5× more flash and XGATE acceleration for deterministic response; versus S912XDP512J1MAL, it trades memory headroom for smaller footprint and lower BOM cost while retaining full CAN/ADC/PWM functionality.

Availability

S912XET256J2CAL is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, and telematics gateway designs requiring stable component supply, long lifecycle support, and AEC-Q100 qualified silicon.

Supply support for S912XET256J2CAL 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 acquired Freescale in 2015 and maintains full support for the S12XE family, including documentation, tools, and long-term supply commitments for automotive-grade microcontrollers.

The S912XET256J2CAL belongs to the HCS12X automotive microcontroller product line, engineered for deterministic real-time control in harsh environments with emphasis on CAN networking, functional safety, and power efficiency.

FAQ

What is the maximum operating frequency of the S912XET256J2CAL?

The S912XET256J2CAL achieves a maximum core clock frequency of 50 MHz using its internal PLL with external crystal input (1–32 MHz range). This frequency is confirmed in Chapter 11 (Clocks and Reset Generator) and electrical characteristics tables of the MC9S12XE-Family Reference Manual Rev. 1.25. The S912XET256J2CAL sustains this speed across its full industrial temperature range (-40°C to +125°C) under specified VDD conditions.

Does the S912XET256J2CAL support CAN FD?

No, the S912XET256J2CAL integrates two legacy MSCAN 2.0B controllers compliant with ISO 11898-1:2003, supporting only classical CAN up to 1 Mbps. It does not implement CAN FD features such as flexible data-rate, extended data length, or CRC enhancements. CAN FD capability was introduced in later NXP families like S32K.

Is the S912XET256J2CAL pin-compatible with other S12XE derivatives?

Yes-the S912XET256J2CAL shares the same 112-pin LQFP package and pinout definition as other S12XE derivatives in that footprint, including MC9S12XEP100MAL and S912XEQ512J1MAL. Pin compatibility is explicitly maintained across the family per Section 1.2.1 and Appendix B of the reference manual.

What debug interface does the S912XET256J2CAL use?

The S912XET256J2CAL uses the Background Debug Module (BDM) interface, accessed via a single BKGD pin and shared with the RESET line. It supports full-speed debugging, flash programming, and register inspection without halting real-time operation-documented in Chapter 7 of the MC9S12XE-Family Reference Manual Rev. 1.25.

How is flash memory protected on the S912XET256J2CAL?

Flash protection on the S912XET256J2CAL is implemented via the Security module (Chapter 9) and Memory Protection Unit (Chapter 4), allowing configuration of read/write/execute permissions per flash block. Once secured, unauthorized access triggers a mass erase; protection settings persist through power cycles and are enforced at hardware level.