NXP Semiconductors MCF52252CAF66

Overview

MCF52252CAF66 from NXP (formerly Freescale) is a 32-bit ColdFire V2 RISC microcontroller designed for industrial control and embedded networking applications. It operates at up to 66 MHz (63 MIPS), integrates 256 KB flash memory and 32 KB SRAM, features FlexCAN 2.0B, three UARTs, two I²C interfaces, QSPI, an 8-channel 12-bit ADC with simultaneous sampling, and supports 100-pin LQFP packaging.

For engineers reviewing the MCF52252CAF66 datasheet, MCF52252CAF66 pinout, MCF52252CAF66 application, or MCF52252CAF66 equivalent, key selection criteria include its 66 MHz ColdFire V2 core with EMAC/CAU acceleration, on-chip Ethernet-ready peripherals (FEC not present in this variant), USB OTG support, and deterministic real-time I/O timing for motor control and protocol gateway designs.

Technical Context

The MCF52252CAF66 implements the ColdFire ISA_A+ instruction set with a dual-pipeline V2 core, including a dedicated Enhanced Multiply-Accumulate (EMAC) unit supporting 16×16→32 and 32×32→48 operations, and a Cryptographic Acceleration Unit (CAU) for DES, 3DES, AES, MD5, and SHA-1. Its clock system combines an on-chip 8 MHz relaxation oscillator, PLL, and external crystal support.

Peripheral integration includes a four-channel DMA controller, four 32-bit input-capture/output-compare timers (DTIMs) with DMA trigger capability, four 16-bit general-purpose timers (GPTs) with PWM/PCM/pulse accumulation modes, and an 8-channel 12-bit ADC with dual sample-and-hold circuits enabling simultaneous sampling of two channels - critical for closed-loop motor control timing.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (14 mm × 14 mm), RoHS-compliant, surface-mount, with 0.5 mm pitch and exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCF52252CAF66, the MCF52254CAF66 offers doubled memory capacity within identical packaging and timing behavior, while the K64F120M shifts to ARM architecture with higher clock rate and integrated Ethernet-but lacks ColdFire's deterministic EMAC/CAU acceleration for legacy real-time control stacks.

Availability

MCF52252CAF66 is available at Aetrix Electronics and suitable for industrial motor control, building automation gateways, secure IoT edge nodes, and medical infusion pump controllers requiring stable component supply and long-term lifecycle assurance.

Supply support for MCF52252CAF66 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 is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT markets, with roots in Freescale's embedded processor heritage.

The MCF52252CAF66 belongs to the ColdFire V2 microcontroller family, engineered for deterministic real-time performance in resource-constrained industrial control systems where low-latency peripheral response and cryptographic acceleration are essential.

FAQ

What is the maximum operating frequency of the MCF52252CAF66?

The MCF52252CAF66 operates at a maximum core frequency of 66 MHz, delivering 63 MIPS (Dhrystone 2.1). This speed is achieved using the on-chip PLL locked to either an external crystal or the internal 8 MHz relaxation oscillator. The peripheral bus runs at 33 MHz or 40 MHz depending on configuration, ensuring deterministic timing for UART, CAN, and ADC subsystems in the MCF52252CAF66.

Does the MCF52252CAF66 include an Ethernet controller?

No, the MCF52252CAF66 does not integrate a Fast Ethernet Controller (FEC). That feature is present only in higher variants of the family (MCF52255, MCF52256, MCF52258, and MCF52259). The MCF52252CAF66 retains all other major peripherals-including FlexCAN 2.0B, USB OTG, QSPI, and dual-sample ADC-but omits FEC to reduce cost and silicon area for non-networked control applications.

What package type is used for the MCF52252CAF66?

The MCF52252CAF66 is packaged in a 100-pin LQFP (14 mm × 14 mm) with 0.5 mm pitch and an exposed thermal pad. This package is distinct from the 144-pin LQFP and 144-ball MAPBGA options used by higher-density variants like the MCF52259. The 100-pin LQFP provides 56 GPIOs and full peripheral signal routing while maintaining compact board area and reflow-compatible assembly for the MCF52252CAF66.

How does the Cryptographic Acceleration Unit (CAU) function in the MCF52252CAF66?

The CAU in the MCF52252CAF66 is a tightly coupled coprocessor that accelerates DES, 3DES, AES, MD5, and SHA-1 operations in hardware, reducing software execution time by up to 70% compared to pure-C implementations. It operates independently of the ColdFire V2 core and uses dedicated registers accessible via memory-mapped I/O. All cryptographic operations in the MCF52252CAF66 are performed without exposing keys to main memory, enhancing side-channel resistance.

Can the MCF52252CAF66 support simultaneous sampling on its ADC channels?

Yes, the MCF52252CAF66 features two independent sample-and-hold (S/H) circuits feeding separate 12-bit ADCs, enabling true simultaneous sampling of two analog channels. This is triggered via dedicated SYNCA and SYNCB pins and is essential for vector-controlled motor drives where phase current measurements must be time-aligned. The MCF52252CAF66 supports both sequential and simultaneous modes, with conversion complete interrupts and configurable threshold-based alerts per channel.