NXP Semiconductors MCF51QE64CLH

Overview

MCF51QE64CLH from NXP Semiconductors (formerly Freescale) is a 32-bit ColdFire V1 microcontroller with 64 KB flash, 8 KB RAM, 70 GPIOs, 24-channel 12-bit ADC, dual analog comparators, dual SCI/LIN interfaces, dual SPI, dual I²C, triple TPM modules, RTC, and rapid GPIO-designed for low-power industrial control and sensor interface applications operating from 1.8 V to 3.6 V.

For engineers reviewing the MCF51QE64CLH datasheet, MCF51QE64CLH pinout, MCF51QE64CLH application, or MCF51QE64CLH equivalent, this page delivers verified electrical specs, package mapping to 80-LQFP, confirmed stop-mode current down to 0.8 µA, real-time counter operation in all power modes, and validated alternative part selection guidance based on Freescale's official MCF51QE128 Series Data Sheet Rev. 7.

Technical Context

The MCF51QE64CLH implements ColdFire Instruction Set Architecture Revision C (ISA_C) with 0.94 Dhrystone MIPS/MHz performance from internal RAM. It integrates an Internal Clock Source (ICS) with FLL-based frequency synthesis, supporting CPU frequencies up to 50.33 MHz above 2.4 V, 40 MHz above 2.1 V, and 20 MHz down to 1.8 V across –40°C to +85°C.

Its system-level architecture includes three distinct stop modes (Stop2/Stop3), a dedicated low-power oscillator (LPO) for RTC and peripheral wake-up, programmable low-voltage detection thresholds (VLVDH/VLVDL), and security circuitry preventing unauthorized access to flash and RAM contents.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (Case 917A, 14 mm² footprint). Pinout validated per Freescale MCF51QE128 Series Data Sheet Rev. 7, Figure 2 and Table 2 - applies identically to MCF51QE64 due to shared pin assignment matrix across the series.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCF51QE64CLH, the MCF51JM128CLK offers drop-in flash expansion while preserving all timing, I/O, and debug behavior; the KL25Z128VLK provides modern ARM toolchain support but requires full architectural re-implementation and lacks ColdFire-specific peripherals like rapid GPIO shadow registers.

Availability

MCF51QE64CLH is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, automotive body electronics, and portable medical diagnostics requiring stable component supply and long-term lifecycle support.

Supply support for MCF51QE64CLH 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 delivering secure, scalable solutions for automotive, industrial, IoT, mobile, and communication infrastructure markets.

The MCF51QE64CLH belongs to the ColdFire Qorivva family - designed specifically for energy-efficient, cost-sensitive embedded control applications demanding deterministic real-time performance and ultra-low standby power.

FAQ

What is the maximum CPU frequency supported by the MCF51QE64CLH across its full operating voltage range?

The MCF51QE64CLH supports up to 50.33 MHz when VDD > 2.4 V, 40 MHz when VDD > 2.1 V, and 20 MHz when VDD > 1.8 V - all guaranteed across the full –40°C to +85°C temperature range per Freescale MCF51QE128 Series Data Sheet Rev. 7 Section 1. The actual achievable frequency depends on bus configuration and clock source selection (XOSC or ICS).

Does the MCF51QE64CLH support operation in Stop3 mode with the ADC and RTC active simultaneously?

Yes, the MCF51QE64CLH supports ADC conversions and RTC counting concurrently in Stop3 mode. The ADC operates fully functional from 3.6 V to 1.8 V in Stop3, and the RTC runs from either the internal 1 kHz low-power oscillator or an external clock source - both explicitly confirmed in the MCF51QE128 Series Data Sheet Rev. 7 Section 1 and Table 10.

What debug interface does the MCF51QE64CLH use, and is it compatible with standard tools?

The MCF51QE64CLH uses a single-wire background debug (BDC) interface via the BKGD/MS pin (PTA4), supporting standard Freescale/CW debugger hardware and software. This interface enables non-intrusive breakpoint setting, memory inspection, and register access without requiring dedicated JTAG pins - and is fully documented in Section 1 of the MCF51QE128 Series Data Sheet Rev. 7.

How many GPIO pins on the MCF51QE64CLH support rapid set/clear/toggle functionality, and which ports are they assigned to?

The MCF51QE64CLH provides 16 bits of Rapid GPIO functionality, shadowed across Port C (PTC0–PTC7) and Port E (PTE0–PTE7). These pins support atomic set, clear, and toggle operations via dedicated CPU-local bus registers - enabling deterministic, cycle-accurate I/O control without read-modify-write overhead, as specified in Section 1 of the MCF51QE128 Series Data Sheet Rev. 7.

Is the MCF51QE64CLH pin-compatible with other members of the MCF51QE128 series, and what package options are available?

Yes, the MCF51QE64CLH is pin-compatible with the MCF51QE128, MCF51QE96, and MCF51QE32 in the 80-pin LQFP (Case 917A) package. It also shares the 64-pin LQFP (Case 840F) footprint with the MCF51QE32 and MCF51QE96 variants - with identical pin assignments per Table 2 and Figures 2–3 in the MCF51QE128 Series Data Sheet Rev. 7.