NXP Semiconductors MCF51JE256CLL

Overview

MCF51JE256CLL from NXP Semiconductors (formerly Freescale) is a 32-bit ColdFire V1 microcontroller featuring a 50.33 MHz CPU, 256 KB on-chip Flash, 32 KB RAM, USB On-The-Go interface, and integrated 12-bit ADC/DAC - designed for low-power industrial control and embedded connectivity applications requiring real-time processing and peripheral integration.

For engineers reviewing the MCF51JE256CLL datasheet, MCF51JE256CLL pinout, MCF51JE256CLL application, or MCF51JE256CLL equivalent, key selection considerations include its dual-oscillator clock architecture (XOSC1 for TOD, XOSC2 for system/USB), ultra-low-power stop3 mode with 6 µs wake-up, Mini-FlexBus expansion capability, and hardware CRC acceleration for firmware integrity verification.

Technical Context

The MCF51JE256CLL 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 modes, enabling precise CPU frequency synthesis up to 50 MHz with ±0.5% to –1% deviation over –40°C to 105°C.

Peripherals are tightly coupled to power management: the Programmable Delay Block (PDB) triggers ADC sampling sequences; PRACMP and ADC operate in stop3 mode; and the Carrier Modulator Timer (CMT) drives infrared output via dedicated IRO pin with high-current sink capability - all coordinated through the System Integration Module (SIM) and interrupt controller (INTC).

Key Specifications

Pinout & Package

Package: 100-pin LQFP (14 mm × 14 mm), surface-mount, with exposed thermal pad per Freescale Package Drawing 98ASB17750D.

Key Features

Applications

Equivalent & Alternatives

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

Compared with K22FN512VLH12 and MCF52259CAG80, the MCF51JE256CLL delivers optimal balance of ultra-low-power operation, integrated IR modulation, and USB OTG PHY - making it uniquely suited for compact, battery-sensitive devices requiring both connectivity and sensor interface without external timing or signal conditioning components.

Availability

MCF51JE256CLL is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, portable medical devices, and building automation sensors requiring stable component supply and long-term lifecycle support.

Supply support for MCF51JE256CLL 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 acquired Freescale in 2015 and continues development and support of the ColdFire microcontroller family, focusing on industrial, automotive, and IoT applications with emphasis on security, low power, and real-time performance.

The MCF51JE256CLL belongs to the ColdFire V1 microcontroller product line, engineered for cost-sensitive, low-power embedded systems requiring USB connectivity, analog signal acquisition, and deterministic real-time control - especially where infrared communication and robust firmware update capability are essential.

FAQ

What is the maximum operating frequency of the MCF51JE256CLL and under what voltage conditions?

The MCF51JE256CLL achieves up to 50.33 MHz at supply voltages above 2.4 V, 40 MHz above 2.1 V, and 20 MHz above 1.8 V - all across the full industrial temperature range of –40°C to 105°C. This voltage-frequency scaling is enforced by internal regulators and verified in the DC Characteristics table (Table 9) of the Rev. 4 datasheet.

Does the MCF51JE256CLL support USB device, host, and OTG modes simultaneously?

Yes, the MCF51JE256CLL implements full USB On-The-Go (OTG) functionality per USB Specification 2.0. It supports device, host, and OTG roles dynamically, with integrated transceiver and 3.3 V regulator - enabling seamless role switching based on ID pin state and VBUS detection without external components.

How many analog input channels does the 12-bit ADC in the MCF51JE256CLL support?

The MCF51JE256CLL features a 12-bit Successive Approximation Register (SAR) ADC with up to 12 single-ended input channels (ADP[11:0]), plus internal bandgap reference and VREFH/VREFL inputs. All channels remain functional down to 1.8 V supply and operate in stop3 mode for low-power sensing.

What is the purpose of the IRO pin on the MCF51JE256CLL and how is it driven?

The IRO (Infrared Output) pin on the MCF51JE256CLL is a dedicated high-current sink output driven by the Carrier Modulator Timer (CMT). It generates modulated infrared carrier signals for remote control applications - configured via CMT registers to set carrier frequency, duty cycle, and burst patterns without CPU intervention.

Can the MCF51JE256CLL execute code from Flash while programming another Flash block?

Yes, the MCF51JE256CLL's 256 KB Flash is split into two independent 128 KB arrays, allowing concurrent read and program/erase operations. This enables interrupt service routines and real-time tasks to execute from one array while firmware updates or data logging occur in the other - confirmed in Section 1.2 "On-Chip Memory" of the datasheet.