NXP Semiconductors MC68HCP11E1CFNE3

Overview

MC68HCP11E1CFNE3 from NXP Semiconductors (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 8-channel 8-bit ADC, SCI, SPI, and a 16-bit timer system. It operates at up to 2 MHz bus frequency and supports single-chip and expanded modes for embedded control in industrial sensors and motor controllers.

For engineers reviewing the MC68HCP11E1CFNE3 datasheet, MC68HCP11E1CFNE3 pinout, MC68HCP11E1CFNE3 application, or MC68HCP11E1CFNE3 equivalent, key selection criteria include EPROM-based firmware persistence, on-chip A/D conversion for analog sensor interfacing, and compatibility with legacy HC11 development tools and bootstrap programming workflows.

Technical Context

The MC68HCP11E1CFNE3 implements the M68HC11 CPU core with full instruction set compatibility to the Motorola 6800 architecture. Its memory subsystem includes 12 KB of user-programmable EPROM, 512 bytes of static RAM, and 256 bytes of EEPROM for nonvolatile configuration storage.

Peripherals are tightly coupled to the CPU via internal address/data bus: the 8-channel ADC supports software- or timer-triggered conversions; the SCI provides asynchronous serial communication with idle-line and address-mark wakeup; the SPI supports master/slave operation with programmable clock polarity and phase; and the 16-bit timer includes four input capture and five output compare channels with real-time interrupt capability.

Key Specifications

Pinout & Package

MC68HCP11E1CFNE3 is housed in a 52-pin PLCC (Plastic Leaded Chip Carrier) package with J-lead geometry, designed for surface-mount reflow assembly and socketed prototyping. Pinout follows the standard M68HC11E1 footprint defined in Freescale Document M68HC11E Family Data Sheet, Rev. 5.1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC68HCP11E1CFNE3, the MC68HC11E9CP trades EPROM for larger EEPROM and removes field-programmability, while the MC68HC11A8CP replaces EPROM with mask ROM and adds built-in monitor firmware-both require hardware or workflow changes for firmware update and lack the same level of field-serviceable code storage.

Availability

MC68HCP11E1CFNE3 is available at Aetrix Electronics and suitable for industrial motor control, legacy automotive sensor interface, embedded HVAC controller, and test equipment firmware loader applications requiring stable component supply and long-term obsolescence management.

Supply support for MC68HCP11E1CFNE3 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 company formed from the spin-off of Philips' semiconductor division, now specializing in secure connectivity solutions and embedded processing.

The M68HC11 product line was originally developed by Motorola and later maintained by Freescale before NXP's acquisition; it targets cost-sensitive, reliability-critical embedded control applications where long-lifecycle support and deterministic real-time behavior are essential.

FAQ

What is the maximum operating frequency of the MC68HCP11E1CFNE3?

The MC68HCP11E1CFNE3 has a maximum bus frequency of 2 MHz, derived from its internal clock generator and external crystal oscillator circuit. This frequency governs instruction execution speed, peripheral timing, and ADC conversion rate. The device does not support higher frequencies due to internal timing constraints of the M68HC11E1 core and EPROM access latency. Operating above 2 MHz may result in undefined behavior or memory corruption.

Does the MC68HCP11E1CFNE3 support in-circuit programming?

Yes, the MC68HCP11E1CFNE3 supports in-circuit EPROM programming via bootstrap mode using the on-chip serial monitor. When held in bootstrap mode at power-on, it accepts firmware images over the SCI interface using tools like PCBUG11. This eliminates the need for external EPROM programmers and allows field updates. Programming requires a valid checksum and adheres to timing specifications in Section 2.4 of the M68HC11E Family Data Sheet, Rev. 5.1.

What package type is used for the MC68HCP11E1CFNE3?

The MC68HCP11E1CFNE3 is packaged in a 52-pin Plastic Leaded Chip Carrier (PLCC) with J-leads, designated as "FNE3" in the part number suffix. This surface-mount package supports reflow soldering and is socket-compatible with standard 52-pin PLCC sockets for prototyping and testing. Mechanical dimensions and lead pitch conform to JEDEC MS-026 standards, and thermal characteristics are specified in Chapter 11 of the M68HC11E Family Data Sheet.

Can the MC68HCP11E1CFNE3 operate in low-power modes?

Yes, the MC68HCP11E1CFNE3 supports two low-power modes: Wait and Stop. In Wait mode, the CPU halts while peripherals remain active; in Stop mode, both CPU and most peripherals halt, reducing current consumption to approximately 10 µA. These modes are entered via SWI or STOP instructions and exited by reset or interrupt. The real-time interrupt (RTI) module can wake the device from Wait mode at programmable intervals, enabling energy-efficient sensor polling.

Is the MC68HCP11E1CFNE3 pin-compatible with other M68HC11E family members?

Yes, the MC68HCP11E1CFNE3 shares identical pinout and electrical characteristics with other 52-pin PLCC variants in the M68HC11E family, including the MC68HC11E9CP and MC68HC11A8CP. This allows direct substitution in existing designs provided that firmware and memory mapping are verified for functional equivalence. However, differences in on-chip memory type (EPROM vs. ROM vs. EEPROM) and security features require software-level validation before replacement.