S912XD64F2VAA
S912XD64F2VAA - 80MHz S12X MCU, 64KB Flash | NXP | Automotive
The NXP Semiconductors S912XD64F2VAA is a 16-bit HCS12X automotive-qualified microcontroller operating at up to 80 MHz, with 64 KB of flash program memory and 59 I/O pins in an 80-pin QFP package. Its -40°C to +105°C temperature range and integrated CAN bus, I²C, SCI, SPI, PWM, watchdog, low-voltage detection, and power-on reset peripherals suit demanding automotive and industrial-control systems.
A microcontroller is an integrated semiconductor device that executes firmware, reads sensor inputs, controls actuators, and coordinates communication between electronic subsystems. The HCS12X architecture remains upward-compatible with the HCS12 instruction set while adding enhanced indexed addressing, an enhanced instruction set, interrupt stacking, and a programmer's model compatible with HCS12. Within the system hierarchy, this MCU combines real-time control, data processing, and serial communications in one device.
The principal verified features are an 80 MHz maximum clock, 64 KB x 8 flash memory, 59 I/O pins, and an 80-pin QFP package. The listed connectivity includes CANbus, I²C, SCI, and SPI, while the peripheral set includes pulse-width modulation, a watchdog timer, low-voltage detection, and power-on reset. These resources reduce the need for external interface devices in body, vehicle, and industrial-control designs.
Its 16-bit HCS12X core is designed for embedded control rather than host-class computing. The 64 KB flash budget provides room for application firmware, while 1 KB of EEPROM supports nonvolatile data storage. The MCU's mix of serial interfaces supports sensor networking, actuator control, diagnostics, and communication with external transceivers or modules.
Typical uses include automotive body and chassis control, engine-adjacent control systems, industrial automation equipment, CAN-connected controllers, data-acquisition systems, and embedded motor-control platforms. The -40°C to +105°C range is especially relevant where components must operate across extended automotive thermal conditions.
Designers should verify clock, memory, peripheral, reset, and pin assignments against the manufacturer datasheet before schematic capture. QFP-80 assembly also requires adequate PCB routing space, pin-1 identification, solderability planning, and thermal-conduction design. Because NXP identifies the part as end of life, long-term availability and legacy-system continuity should be confirmed before new production commitments.
This page consolidates the verified manufacturer and distributor findings, distinguishes lifecycle risk from electrical suitability, and provides engineering-oriented selection guidance. It does not infer missing electrical limits or claim an unverified drop-in replacement where the available cross-reference evidence does not establish pin compatibility.
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