MCF51AC256ACFUE

MCF51AC256ACFUE is a Freescale/NXP ColdFire-based microcontroller (MCU) in the MCF51AC family. It combines a 32‑bit ColdFire CPU core with on‑chip flash memory (256 KB) and RAM, plus a broad set of peripherals for embedded applications.
Key points
- Core: ColdFire 32-bit CPU, designed for efficient embedded performance.
- Memory: 256 KB on‑chip flash; RAM size varies by variant.
- Peripherals: GPIO, multiple timers, analog-to-digital converters, serial interfaces (UARTs, SPI, I2C), and other on‑chip modules; some packages include USB or other features depending on the variant.
- Package/variant: The “UE” suffix indicates a specific package and temperature rating for this device variant.
- Use case: Suitable for mid‑range embedded systems requiring integrated peripherals and moderate performance.
Getting started
- Refer to the official datasheet and user manual for exact pinout, memory map, and peripheral counts.
- Development tools: Freescale/NXP toolchains (CodeWarrior, IAR, GCC) and standard on‑chip programming/debug interfaces as described in the docs.

Key features of MCF51AC256ACFUE:
- ColdFire 32-bit CPU core (up to ~40 MHz)
- 256 KB on-chip flash with protection and in-circuit programming
- On-chip RAM for data and stack
- Peripherals: multiple UARTs, SPI, I2C
- Analog: 12-bit ADC with multiple channels
- Timers and PWM outputs for timing/control
- DMA and advanced interrupt controller
- On-chip debugging and in-system programming support
- Low-power modes with fast wake-up
- Suitable for automotive/industrial sensing and control applications

Pin count: 144 pins (LQFP package, part code ends with UE).
Function: Freescale/NXP MCF51AC256ACFUE is a ColdFire 32‑bit microcontroller with 256 KB flash (and typically ~16 KB RAM), plus integrated peripherals (USART/SPI/I2C, CAN, timers, ADC, etc.) for general embedded control.

- Manufacturer: NXP Semiconductors (current owner). The MCF51AC256ACFUE is from Freescale’s ColdFire MCU line, and Freescale was acquired by NXP in 2015.
- Company type: Dutch multinational semiconductor company that designs and manufactures integrated circuits, microcontrollers, and embedded processors for automotive, industrial, and consumer electronics.

Key application areas for MCF51AC256ACFUE (ColdFire MCU):
- Automotive body electronics and gateways
- Industrial automation and machine control
- Home appliances and consumer electronics
- Portable/medical instrumentation and devices
- Building automation, energy management, metering
- Embedded control systems and data acquisition interfaces
These areas leverage its 256 KB flash, mixed-signal peripherals, and robust embedded processing for compact, cost-effective controllers.

LQFP-144 (144-pin thin quad flat package).