MC9S12XD256CAL

MC9S12XD256CAL is a Freescale/NXP 16‑bit HCS12XD family microcontroller intended for automotive and industrial control. It combines a 16‑bit HCS12X CPU core with on‑chip flash and memory.
Key points
- Core and performance: HCS12X 16‑bit core (Harvard architecture) with operation in the tens of MHz range.
- Memory: 256 KB on‑chip flash for program code; about 12 KB RAM (plus options for small EEPROM in some variants).
- Peripherals: multiple serial interfaces (SCI/UART), SPI, I2C; 12‑bit ADC with several channels; multiple 16‑bit timers and PWM outputs; watchdog and COP; clock/power management features.
- Debug/boot: in‑circuit debugging support (BDM/Background Debug) and on‑chip boot/boot loader options.
- Package/grade: available in automotive/industrial packages; CAL suffix indicates a specific grade/packaging per the datasheet (verify exact details in the datasheet).
- Development: supported by CodeWarrior for HCS12 and other toolchains; refer to the MC9S12XD256CAL datasheet and reference manuals for exact memory map, registers, and pinout.
For precise specs, memory sizes, and pinout, consult the official datasheet and reference manual.

MC9S12XD256CAL features (highlights):
- 16‑bit HCS12 core with XGATE co‑processor for real‑time ISR offload
- 256 KB flash program memory with in‑system programming and boot options
- On‑chip RAM (dense memory for data and stack)
- Automotive CAL variant (industrial/automotive‑grade) with extended temperature capability
- Peripherals: CAN 2.0B, SCI/UARTs, SPI, I2C
- A/D: 12‑bit ADC with multiple channels
- Timers and PWM channels (multiple 16‑bit timers)
- DMA controller for high‑speed data transfers
- Memory protection/BDM (Background Debug Mode) support
- Flexible clocking: internal oscillator/PLL options, multiple low‑power modes
- In‑system programming and boot/bootloader support
Note: exact RAM size and peripheral counts can vary by package; consult the datasheet for precise specs.

MC9S12XD256CAL is available in a 100‑pin LQFP (Plastic Leaded Quad Flat Pack), approximately 14×14 mm, RoHS‑compliant.

- Pin count: 144-pin LQFP package (MC9S12XD256CAL).
- Function: 16‑bit HCS12X microcontroller with 256 KB on‑chip flash (and on‑chip RAM and peripherals) for embedded control applications.

- Manufacturer: NXP Semiconductors (the product line originated with Freescale Semiconductor; Freescale was acquired by NXP in 2015).
- What kind of company: A global semiconductor company that designs and manufactures embedded processors and microcontrollers (plus analog, sensors, and networking solutions) for automotive, industrial, consumer, and communications markets.

MC9S12XD256CAL is a high-performance 16‑bit MCU suitable for automotive and industrial control. Typical applications include automotive ECUs (engine, transmission, chassis, instrument clusters, body electronics), motor control and power electronics, industrial automation and data acquisition, programmable logic controllers, and embedded instrumentation in HVAC and consumer appliances. It features on-chip flash (256 KB), multiple timers and PWM, ADCs, and CAN/SPI/I2C/UART interfaces, with automotive-grade robustness for harsh environments.