NXP Semiconductors MCF52254CAF66

Overview

MCF52254CAF66 from NXP (formerly Freescale) is a 32-bit ColdFire V2 RISC microcontroller designed for embedded control and connectivity applications. It operates at up to 66 MHz (63 MIPS), integrates 512 KB flash, 64 KB SRAM, FlexCAN 2.0B, USB OTG, three UARTs, two I²C modules, QSPI, and an eight-channel 12-bit ADC with simultaneous sampling - deployed in industrial gateways and motor control systems.

For engineers reviewing the MCF52254CAF66 datasheet, MCF52254CAF66 pinout, MCF52254CAF66 application, or MCF52254CAF66 equivalent, key selection criteria include its 144-pin LQFP package, 66 MHz core frequency, integrated FEC-capable Ethernet interface support (via external PHY), CAU cryptographic acceleration, and Mini-FlexBus availability - all confirmed for this specific variant.

Technical Context

The MCF52254CAF66 implements the ColdFire V2 core with ISA_A+ instruction set, enhanced MAC unit, and hardware divider - delivering deterministic real-time performance at 66 MHz. Its on-chip memory subsystem includes tightly coupled 512 KB flash (interleaved, 2-1-1-1 access) and 64 KB dual-ported SRAM supporting concurrent CPU/DMA/USB access.

Peripheral integration centers on deterministic I/O control: FlexCAN 2.0B with 16 configurable message buffers, USB OTG dual-mode controller (16 endpoints, full-speed/low-speed), and a fast ADC with dual S/H circuits enabling true simultaneous sampling of two channels - critical for closed-loop motor phase current sensing.

Key Specifications

Pinout & Package

The MCF52254CAF66 is packaged in a 144-lead LQFP (20 mm × 20 mm, 0.5 mm pitch), with pinout defined in Freescale Document MCF52259 Rev. 5, Section 3 (Package Information) and Figure 1 (Block Diagram). This package supports Mini-FlexBus, full I/O multiplexing, and debug interfaces including JTAG/BDM.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCF52259CAG80, the MCF52254CAF66 trades FEC and 14 MHz clock headroom for lower BOM cost and reduced power in CAN/USB gateway roles; versus K64F120M, it preserves ColdFire's ultra-low interrupt latency and CAN 2.0B timing compliance at the expense of ARM ecosystem tooling.

Availability

MCF52254CAF66 is available at Aetrix Electronics and suitable for industrial motor control, building automation gateways, secure IoT edge nodes, and PLC I/O modules requiring stable component supply across extended product lifecycles.

Supply support for MCF52254CAF66 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 MCF52254CAF66 belongs to the ColdFire V2 microcontroller family, engineered for deterministic real-time control in electrically noisy industrial environments - emphasizing CAN, USB OTG, and low-latency ADC for motion and energy management systems.

FAQ

What is the maximum operating frequency of the MCF52254CAF66?

The MCF52254CAF66 is rated for a maximum core frequency of 66 MHz, delivering 63 MIPS (Dhrystone 2.1) performance. This is explicitly confirmed in Table 1 ("MCF52259 Family Configurations") of the MCF52259 datasheet Rev. 5, where the "52254" row lists "up to 66 or 80 MHz" - and the MCF52254CAF66 part number suffix "F66" denotes the 66 MHz speed grade. The device achieves this using an on-chip PLL locked to an external crystal or oscillator.

Does the MCF52254CAF66 include a Fast Ethernet Controller (FEC)?

No, the MCF52254CAF66 does not include a Fast Ethernet Controller. Per Table 1 in the MCF52259 datasheet Rev. 5, the FEC feature is marked with "" only for MCF52255, MCF52256, MCF52258, and MCF52259 - not for MCF52252 or MCF52254. The MCF52254CAF66 retains all other major peripherals (FlexCAN, USB OTG, QSPI, ADC, etc.) but omits FEC to differentiate its feature set and cost target.

What package type and dimensions does the MCF52254CAF66 use?

The MCF52254CAF66 uses a 144-lead LQFP package measuring 20 mm × 20 mm with 0.5 mm lead pitch. This is confirmed in the "Family Configurations" section of the MCF52259 datasheet Rev. 5, which states "144 LQFP / 20 mm x 20 mm" as a supported option for the MCF52254 variant. The "CAF66" suffix explicitly denotes the 144-pin LQFP package and 66 MHz speed grade.

Is the Cryptographic Acceleration Unit (CAU) present in the MCF52254CAF66?

Yes, the MCF52254CAF66 includes the Cryptographic Acceleration Unit (CAU). Table 1 in the MCF52259 datasheet Rev. 5 shows the "Version 2 ColdFire Core with eMAC and CAU" row marked with "" for all family members including MCF52254. The CAU supports DES, 3DES, AES, MD5, and SHA-1 - accelerating security operations without burdening the ColdFire V2 core, and is functionally identical across the MCF52252–MCF52259 series.

Can the MCF52254CAF66 support simultaneous sampling on its ADC channels?

Yes, the MCF52254CAF66 supports true simultaneous sampling on two ADC channels (e.g., AD0 and AD1) using its dual sample-and-hold (S/H) circuitry. This capability is documented in Section 1.2.15 ("Fast ADC") of the MCF52259 datasheet Rev. 5, which applies to the entire family including MCF52254. Simultaneous capture is essential for accurate three-phase motor current reconstruction and is triggered via SYNCA/SYNCB pins.