NXP Semiconductors MCF51MM128CLK

Overview

MCF51MM128CLK from NXP Semiconductors (formerly Freescale) is a 32-bit ColdFire V1 microcontroller featuring a 128 KB Flash/32 KB RAM architecture, 100-pin LQFP package, and integrated measurement engine including 16-bit SAR ADC, 12-bit DAC, dual OPAMPs, and dual TRIAMPs. It operates up to 40 MHz at 2.1 V and supports ultra-low-power stop modes with 6 µs wake-up time, targeting handheld metering and portable industrial sensors.

For engineers reviewing the MCF51MM128CLK datasheet, MCF51MM128CLK pinout, MCF51MM128CLK application, or MCF51MM128CLK equivalent, key selection criteria include its dual-oscillator clock system (XOSC1 for TOD, XOSC2 for USB/CPU), on-chip USB OTG transceiver with internal 3.3 V regulator, Mini-FlexBus interface for external memory expansion, and hardware CRC acceleration for firmware integrity verification.

Technical Context

The MCF51MM128CLK implements the ColdFire Instruction Set Revision C (ISA_C) with 32-bit MAC support for signed/unsigned integer and fractional arithmetic. Its Multipurpose Clock Generator (MCG) integrates both PLL and FLL, enabling CPU frequencies from 4 kHz to 50 MHz with ±0.5% to –1% deviation over temperature and voltage.

System-level timing includes dedicated Time-of-Day (TOD) counter with ultra-low-power 1/4 sec resolution and external 32.768 kHz crystal support, plus dual SPI interfaces (SPI1 with 32-bit FIFO, SPI2 without FIFO), two UARTs (SCI1/SCI2) with stop3 wake-up capability, and dual 4-channel Timer/PWM Modules supporting edge- and center-aligned PWM.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (14 mm × 14 mm), RoHS-compliant, lead-free, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Kinetis K22F51212 and MCF52259, the MCF51MM128CLK provides tighter analog-digital integration for sensor-centric designs, lower active and stop-mode power consumption, and native USB OTG connectivity-reducing component count and simplifying certification for portable medical and industrial devices.

Availability

MCF51MM128CLK is available at Aetrix Electronics and suitable for smart energy metering, portable gas detection, industrial remote control, and medical point-of-care sensor hub applications requiring stable component supply and long-term lifecycle support.

Supply support for MCF51MM128CLK 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 company delivering secure, scalable solutions for automotive, industrial, IoT, and mobile applications.

The MCF51MM128CLK belongs to the ColdFire V1 microcontroller family, designed specifically for low-cost, low-power, high-precision handheld metering and portable sensor applications with integrated analog front-end and USB connectivity.

FAQ

What is the maximum operating frequency of the MCF51MM128CLK and under what voltage conditions?

The MCF51MM128CLK achieves a maximum operating frequency of 40 MHz when supplied with ≥2.1 V across the full industrial temperature range (–40°C to 105°C). At 2.4 V or higher, it supports up to 50.33 MHz, but this higher speed is not guaranteed for the MCF51MM128CLK variant per the documented feature table and electrical specifications in Rev. 5 of the MCF51MM256/128 datasheet. The MCF51MM128CLK is characterized and specified for 40 MHz operation at 2.1 V minimum.

Does the MCF51MM128CLK support USB device, host, and OTG modes simultaneously?

Yes, the MCF51MM128CLK implements a dual-role USB On-The-Go (OTG) controller compliant with USB Specification 2.0. It supports device, host, and OTG configurations dynamically through software control, with an on-chip transceiver and integrated 3.3 V regulator eliminating external components. The USB_ID pin detects role negotiation, and USB_VBUSVLD/USB_SESSVLD signals manage session validity per OTG protocol requirements.

How many analog input channels does the MCF51MM128CLK's 16-bit ADC support, and are they usable in low-power modes?

The MCF51MM128CLK's 16-bit SAR ADC supports up to four differential channels (eight inputs) and eight single-ended channels. All ADC functions-including range compare, hardware trigger selection, and result buffering-are fully operational in stop3 mode, enabling precise periodic sampling while maintaining ultra-low power consumption. The ADC operates across the full 1.8 V to 3.6 V supply range, with specified performance down to 1.8 V.

What packaging options are available for the MCF51MM128CLK, and which one is documented in the official datasheet?

The MCF51MM128CLK is documented in the official Freescale MCF51MM256/128 datasheet (Rev. 5, 07/2012) for the 100-pin LQFP (14 mm × 14 mm) package. While the family includes variants in 80-pin LQFP, 81-pin MAPBGA, and 104-pin MAPBGA, the MCF51MM128CLK part number specifically corresponds to the 100-pin LQFP configuration as confirmed in Table 1 (Features by MCU and Package) and Figure 3 (100-Pin LQFP).

Can the MCF51MM128CLK generate precise infrared carrier signals for remote control applications?

Yes, the MCF51MM128CLK includes a dedicated Carrier Modulator Timer (CMT) with integrated carrier generator, modulator, and driver for infrared output. The IRO pin provides high-current sink capability optimized for driving IR LEDs directly. The CMT supports programmable carrier frequency and duty cycle, and operates in stop3 mode, allowing ultra-low-power wake-up and transmission-making it ideal for battery-operated remote control units.