NXP Semiconductors MCF51MM128VMB

Overview

MCF51MM128VMB from NXP Semiconductors (formerly Freescale) is a 32-bit ColdFire V1 microcontroller optimized for low-power handheld metering applications. It integrates 128 KB Flash, 32 KB RAM, a 16-bit SAR ADC with 4 differential/8 single-ended channels, dual 4-channel TPMs, USB On-The-Go, and a Measurement Engine including DAC, OPAMP, TRIAMP, and PDB. It operates up to 50.33 MHz at 2.4 V and supports -40°C to 105°C industrial temperature range.

For engineers reviewing the MCF51MM128VMB datasheet, MCF51MM128VMB pinout, MCF51MM128VMB application, or MCF51MM128VMB equivalent, key selection criteria include its integrated analog front-end (ADC/DAC/OPAMP/TRIAMP), ultra-low-power stop modes with TOD and external oscillator wake-up, Mini-FlexBus expansion capability, and dual-role USB OTG with on-chip transceiver and 3.3 V regulator.

Technical Context

The MCF51MM128VMB implements the ColdFire Instruction Set Revision C (ISA_C) with 32-bit MAC support for signed/unsigned integer and fractional operations. Its Multipurpose Clock Generator (MCG) combines PLL and FLL with internal reference trimming (0.2% resolution, ±0.5% to –1% deviation over voltage/temperature) to generate CPU clocks from 4 kHz to 50 MHz.

System-level protection includes COP watchdog with dedicated 1 kHz clock option, low-voltage detect with configurable trip points and warning interrupt, illegal opcode/address detection, Flash block protection, and hardware CRC. The integrated DEBUG_Rev_B+ interface enables real-time debug via single-wire BDM with 6 hardware breakpoints and on-chip trace buffer.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with K22F51212 and MCF51JM128VFB, the MCF51MM128VMB uniquely integrates TRIAMP, CMT, and Mini-FlexBus in a 100-pin LQFP-enabling single-chip solutions for analog-intensive, expandable, and IR-enabled metering without external signal conditioning or bus controllers.

Availability

MCF51MM128VMB is available at Aetrix Electronics and suitable for smart electricity meters, portable gas detectors, industrial flow meters, energy monitoring gateways, and handheld utility test equipment requiring stable component supply and long-term industrial lifecycle support.

Supply support for MCF51MM128VMB 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 applications.

The MCF51MM128VMB belongs to NXP's ColdFire V1 microcontroller product line, designed specifically for ultra-low-power, analog-rich metering and sensing applications where integrated signal chain peripherals reduce system complexity and bill-of-materials cost.

FAQ

What is the maximum operating frequency of the MCF51MM128VMB and under what voltage conditions?

The MCF51MM128VMB achieves a maximum operating frequency of 50.33 MHz when supplied with ≥2.4 V across the full industrial temperature range (–40°C to 105°C). At ≥2.1 V, it operates up to 40 MHz, and at ≥1.8 V, up to 20 MHz. These specifications are guaranteed per the official Freescale MCF51MM256/128 datasheet Rev. 5 (07/2012), and the MCF51MM128VMB shares identical electrical characteristics with the MCF51MM256 series per Table 1.

Does the MCF51MM128VMB support USB On-The-Go functionality, and what hardware is integrated to enable it?

Yes, the MCF51MM128VMB supports full USB On-The-Go (OTG) functionality compliant with USB Specification 2.0. It integrates an on-chip transceiver and a dedicated 3.3 V voltage regulator (VUSB33), eliminating the need for external PHY or LDO components. This integration reduces system cost and board area while supporting control, bulk, interrupt, and isochronous transfer types in device, host, or OTG configurations.

How many analog input channels does the 16-bit ADC in the MCF51MM128VMB support, and what configuration options are available?

The MCF51MM128VMB features a 16-bit successive approximation ADC (ADC16) supporting up to 4 dedicated differential input channels (each requiring two pins) and 8 single-ended channels. It includes range-compare functionality, internal bandgap reference, temperature sensor (1.7 mV/°C), and operates in stop3 mode. All 12 channels are accessible in the 100-pin LQFP package, as confirmed in Table 1 and Figure 3 of the MCF51MM256/128 datasheet.

What power-saving features does the MCF51MM128VMB offer for battery-powered applications?

The MCF51MM128VMB provides two ultra-low-power stop modes, a Time-of-Day (TOD) counter with up to 64 sec timeout, and an ultra-low-power external oscillator (XOSC1) for accurate wake-up during stop modes. Wake-up from stop3 takes only 6 µs. Peripheral clock enable registers allow selective disabling of unused module clocks, further reducing current draw-making it ideal for multi-year battery life in handheld metering devices.

Is the MCF51MM128VMB pin-compatible with other members of the MCF51MM family, such as the MCF51MM256VMB?

No, the MCF51MM128VMB is not pin-compatible with the MCF51MM256VMB. While both share the same 100-pin LQFP package variant (see Table 1), the MCF51MM256VMB is specified for 104-pin MAPBGA and 100-pin LQFP, whereas the MCF51MM128VMB is documented exclusively for 100-pin LQFP and 80-pin LQFP packages. Pin assignments differ between variants, and Flash size differences do not affect pinout-but package-specific pin mappings must be verified per Figure 3 and Table 3.