NXP Semiconductors MC68HC11K1CFNE4R

Overview

MC68HC11K1CFNE4R from Freescale Semiconductor is an 8-bit HCMOS microcontroller unit (MCU) featuring 512 bytes of on-chip EEPROM, 512 bytes of RAM, and 24 KB of ROM. It integrates a 16-bit timer subsystem with input capture, output compare, pulse accumulator, and real-time interrupt capabilities, plus an 8-channel 8-bit analog-to-digital converter. It is used in industrial motor control systems requiring deterministic timing and embedded sensor interfacing.

For engineers reviewing the MC68HC11K1CFNE4R datasheet, MC68HC11K1CFNE4R pinout, MC68HC11K1CFNE4R application, or MC68HC11K1CFNE4R equivalent, key selection criteria include EEPROM retention (10 years), A/D conversion time (25 µs max), single-chip mode operation, E-clock output synchronization, and compatibility with legacy M68HC11 development tools and bootloaders.

Technical Context

The MC68HC11K1CFNE4R implements the M68HC11 CPU core with full instruction set compatibility to the Motorola 6800 architecture. It operates in three primary modes - single-chip, expanded, and bootstrap - with configurable memory mapping via chip select logic and programmable CONFIG register settings.

Its peripheral suite includes dual serial interfaces (SCI and SPI), a 16-bit timer system supporting PWM generation, and an 8-input A/D converter with software-triggered or timer-synchronized conversions. All I/O ports support internal pullups and are configurable as general-purpose digital I/O or dedicated peripheral functions.

Key Specifications

Pinout & Package

MC68HC11K1CFNE4R is housed in an 84-pin Plastic Leaded Chip Carrier (PLCC), case 780, with 0.050-inch lead pitch and JEDEC-standard footprint. The package supports through-hole and surface-mount assembly and provides thermal performance suitable for industrial ambient conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC68HC11E9CP and MC9S12XDP512, the MC68HC11K1CFNE4R uniquely balances legacy toolchain compatibility, on-chip EEPROM for field updates, and integrated A/D - making it optimal for cost-sensitive, maintenance-aware industrial upgrades where CAN is not required.

Availability

MC68HC11K1CFNE4R is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, embedded sensor nodes, and legacy PLC I/O modules requiring stable component supply and long-term lifecycle support.

Supply support for MC68HC11K1CFNE4R 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

Freescale Semiconductor (now part of NXP Semiconductors) was a leading designer of embedded processors and analog/mixed-signal ICs, known for automotive, industrial, and networking solutions.

The MC68HC11K1CFNE4R belongs to the M68HC11K family - designed specifically for cost-effective, real-time control applications where deterministic timing, EEPROM-based configuration, and analog integration are essential in resource-constrained environments.

FAQ

What is the maximum operating frequency of the MC68HC11K1CFNE4R?

The MC68HC11K1CFNE4R supports a maximum crystal frequency of 8 MHz, yielding an E-clock output of 4 MHz in standard configuration. Its internal bus operates at half the E-clock rate, resulting in a maximum effective instruction execution rate of 2 MHz. This frequency is validated across the full industrial temperature range (–40°C to +85°C) per the official Freescale electrical characteristics table.

Does the MC68HC11K1CFNE4R support in-system programming?

Yes, the MC68HC11K1CFNE4R includes a factory-programmed bootstrap monitor ROM that enables in-system programming via its SCI interface. Using the standard Freescale serial bootloader protocol, firmware updates can be performed without removing the device from the PCB or using external programming hardware - a key feature confirmed in Section 15 of the M68HC11K Family Technical Data.

What is the endurance rating of the on-chip EEPROM in the MC68HC11K1CFNE4R?

The on-chip EEPROM in the MC68HC11K1CFNE4R is rated for a minimum of 10,000 write/erase cycles and guarantees data retention for at least 10 years at +85°C. These specifications are documented in Section 12.13 (EEPROM Characteristics) of the official Freescale M68HC11K Family Technical Data document.

Can the MC68HC11K1CFNE4R operate in low-power modes?

Yes, the MC68HC11K1CFNE4R supports three low-power modes: Wait (CPU halted, peripherals active), Stop (all clocks stopped except RTC-related logic), and Slow (divided E-clock). These modes reduce current consumption to as low as 10 µA in Stop mode, enabling battery-backed operation in remote sensor applications - details are specified in Section 5.8 of the technical data manual.

Is the MC68HC11K1CFNE4R pin-compatible with other M68HC11K variants?

The MC68HC11K1CFNE4R uses an 84-pin PLCC package (case 780), matching the pinout of other 84-pin M68HC11K family members such as the MC68HC11K4CFNE2. Pin compatibility is confirmed by Figure 2-1 ("Pin Assignments for M68HC11K 84-Pin PLCC/J-Cerquad") in the official Freescale technical documentation.