S912XET256W1CAL
S912XET256W1CAL - 16-Bit 50MHz 256KB MCU | NXP
The NXP Semiconductors S912XET256W1CAL is a 16-bit S12X microcontroller with a 50 MHz bus, 256 KB of Flash, and a 112-pin LQFP package measuring 20 mm by 20 mm. It is specified for industrial temperature operation from -40 °C to +85 °C and is identified by the verified product data as automotive qualified. The device belongs to the HCS12X family and combines an embedded MCU core with automotive-oriented integration and memory-protection capabilities.
A microcontroller is a programmable semiconductor that integrates a CPU core, Flash program memory, data memory, peripherals, and interface logic into one device. The S12X MCU family is used when a design requires deterministic control, extensive peripheral integration, and a compact single-chip implementation. Its instruction set and bus architecture are intended for embedded control rather than general-purpose computing, making the device suitable for automotive electronics, industrial controllers, and communication modules.
The verified S912XET256W1CAL information identifies a 16-bit CPU operating at 50 MHz, 256 KB Flash organized as 256K x 8, and a 112-LQFP package. The S12X XGATE coprocessor assists virtual-peripheral development and can improve execution throughput for interrupt-driven and signal-processing workloads. The device also includes a memory protection unit, supervisor and user modes, a 12-bit ADC with a stated 3 microsecond conversion time, an enhanced capture timer, periodic interrupt timer, and real-time interrupt timer. Programmable hardware-emulated EEPROM supports designs that require rewriteable nonvolatile data without assigning a separate external EEPROM.
The HCS12X architecture is appropriate for applications needing deterministic interrupt response and broad on-chip integration. Its 256 KB Flash provides room for boot code, application logic, calibration tables, and diagnostics, while the XGATE coprocessor can handle time-critical background tasks. The 12-bit ADC and timer resources reduce the need for separate analog and timing components. The memory protection unit and supervisor/user mode features support controlled software execution and system integrity.
Typical applications include automotive body and chassis control modules, industrial automation controllers, sensor-conditioning equipment, motor-control support circuits, communication gateways, and embedded instrumentation. The verified source data identifies the device as automotive qualified, while the listed -40 °C to +85 °C range covers industrial temperature conditions. Exact peripheral availability, pin multiplexing, memory organization, and electrical limits must be confirmed against the NXP datasheet for the specific design.
When planning a PCB, reserve all 112 LQFP pins and confirm the pin multiplexing requirements before assigning analog, communication, timer, debug, and power functions. Place decoupling and support components close to their associated supply pins, route sensitive analog signals away from fast digital edges, and validate the external clock, reset, programming, and communication interfaces against the manufacturer reference design. The 20 mm by 20 mm LQFP is a relatively large fine-pitch package, so assembly capability and thermal performance should be checked early.
This page combines the verified NXP and distributor product information with an explicit distinction between confirmed specifications and design information that still requires datasheet review. It also records the package, temperature range, qualification claim, Flash capacity, CPU speed, and available alternative information so that engineers can assess fit before beginning schematic capture.
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