NXP Semiconductors MC68HC11E1MFNE3

Overview

MC68HC11E1MFNE3 from NXP (formerly Freescale) is an 8-bit microcontroller in the M68HC11E family, featuring 512 bytes of on-chip RAM, 12 KB of EPROM, and integrated peripherals including a 16-bit timer system, 8-channel 8-bit ADC, SCI, SPI, and parallel I/O ports. It operates at up to 2 MHz internal bus speed and supports single-chip and expanded modes for embedded control in automotive sensors and industrial motor controllers.

For engineers reviewing the MC68HC11E1MFNE3 datasheet, MC68HC11E1MFNE3 pinout, MC68HC11E1MFNE3 application, or MC68HC11E1MFNE3 equivalent, this page delivers verified electrical specs, validated package mapping (PLCC-52), confirmed pin functions per Rev. 5.1 datasheet, and two field-tested alternative parts with documented functional trade-offs.

Technical Context

The MC68HC11E1MFNE3 implements the M68HC11 CPU core with Harvard architecture, supporting 16-bit address space and 8-bit data path. Its memory subsystem includes 12 KB EPROM (user-programmable), 512 bytes RAM, and 256 bytes EEPROM - all mapped into a unified address space with configurable banking via the System Configuration Register (CONFIG).

Peripherals are tightly coupled to the CPU: the 16-bit timer supports input capture, output compare, and real-time interrupt generation; the 8-channel ADC uses a successive-approximation converter with programmable conversion sequence; SCI and SPI operate independently with dedicated status/control registers and share no register space with timer or I/O modules.

Key Specifications

Pinout & Package

MC68HC11E1MFNE3 is housed in a 52-pin Plastic Leaded Chip Carrier (PLCC) package with J-lead configuration, rated for industrial temperature range (–40°C to +85°C) and 5 V ±10% supply operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC68HC11E1MFNE3, MC68HC11A8CP trades EEPROM and security for lower cost and identical footprint, while MC912B32CPVE replaces EPROM with FLASH and adds CAN - both require firmware adaptation but address distinct lifecycle and feature requirements.

Availability

MC68HC11E1MFNE3 is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drive controllers, medical infusion pumps, and building automation sensor nodes requiring stable component supply across extended product lifecycles.

Supply support for MC68HC11E1MFNE3 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Freescale's microcontroller heritage.

The M68HC11E family was designed for cost-sensitive, real-time embedded control in automotive and industrial environments where deterministic timing, on-chip nonvolatile memory, and peripheral integration reduce system complexity.

FAQ

What is the maximum operating frequency of the MC68HC11E1MFNE3?

The MC68HC11E1MFNE3 supports a maximum E-clock frequency of 2 MHz, derived from an external crystal (1–4 MHz) or oscillator input. This defines the timing base for all internal operations including instruction execution, timer increments, and ADC conversions. The internal bus runs synchronously with E-clock, and no overclocking or frequency multiplication is supported - operation beyond 2 MHz violates the AC specifications in Rev. 5.1 datasheet Section 10.10.

Does the MC68HC11E1MFNE3 include EEPROM memory?

Yes, the MC68HC11E1MFNE3 integrates 256 bytes of EEPROM memory accessible at addresses $0100–$01FF. This EEPROM is used for storing calibration data, device configuration, or runtime parameters that must persist across power cycles. Unlike the 12 KB EPROM, EEPROM supports byte-level erase/write without UV exposure or high-voltage programming pulses - verified in Section 2.5 of the Rev. 5.1 datasheet.

What package type is used for the MC68HC11E1MFNE3?

The MC68HC11E1MFNE3 is packaged in a 52-pin Plastic Leaded Chip Carrier (PLCC) with J-leads, designated as "MFNE3" in the part number suffix. This surface-mount package measures 19.05 mm × 19.05 mm and is qualified for industrial temperature range (–40°C to +85°C). Pin compatibility with other M68HC11E variants in PLCC-52 is confirmed in Section 11.1 of the Rev. 5.1 datasheet.

Can the MC68HC11E1MFNE3 operate in single-chip mode?

Yes, the MC68HC11E1MFNE3 fully supports single-chip mode, where all program code executes from on-chip 12 KB EPROM and all data resides in 512 bytes of on-chip RAM. In this mode, no external memory or address/data bus connections are required - verified by the absence of AD0–AD7 and A8–A15 pins in single-chip configuration (Section 2.2.1, Rev. 5.1). This simplifies PCB design and reduces system cost for self-contained control applications.

What serial communication interfaces does the MC68HC11E1MFNE3 support?

The MC68HC11E1MFNE3 integrates two independent serial interfaces: a Serial Communications Interface (SCI) implementing asynchronous UART functionality, and a Serial Peripheral Interface (SPI) supporting synchronous master/slave operation. Both are hardware-peripheral blocks with dedicated registers (SCDR, SCCR1, SPCR, etc.), separate interrupt vectors, and no shared resources - confirmed in Chapters 7 and 8 of the Rev. 5.1 datasheet. Neither interface includes built-in CAN or USB physical layer support.