NXP Semiconductors MCHC11F1CFNE2R

Overview

MCHC11F1CFNE2R from NXP Semiconductors (formerly Freescale) is an 8-bit microcontroller unit (MCU) based on the MC68HC11 architecture, featuring 512 bytes of RAM, 2 KB of EEPROM, and 12 KB of on-chip ROM. It supports single-chip and expanded operating modes, includes a 10-bit ADC with 8 channels, dual serial interfaces (SCI and SPI), and a 16-bit timer system with input capture/output compare. It is used in industrial control panels requiring deterministic real-time I/O handling.

For engineers reviewing the MCHC11F1CFNE2R datasheet, MCHC11F1CFNE2R pinout, MCHC11F1CFNE2R application, or MCHC11F1CFNE2R equivalent, key selection criteria include on-chip EEPROM retention, SCI/SPI coexistence, STOP/WAIT low-power modes, and compatibility with legacy HC11 toolchains and assembly codebases.

Technical Context

The MCHC11F1CFNE2R implements the classic MC68HC11 CPU core with full instruction set compatibility, including indexed, extended, and relative addressing modes. It integrates a 16-bit timer subsystem with four input capture and five output compare channels, plus pulse accumulator and real-time interrupt capabilities.

Its memory architecture includes 12 KB of mask-programmed ROM for bootloader and fixed firmware, 2 KB of EEPROM for nonvolatile data storage (100K write/erase cycles, >10-year retention), and 512 bytes of static RAM. The device supports both internal crystal oscillator (1–4 MHz) and external clock input, with E-clock derivation and 4×E-clock output for synchronized multi-MCU systems.

Key Specifications

Pinout & Package

This device is packaged in an 80-pin QFP (Quad Flat Package) with 0.65 mm lead pitch, compliant with JEDEC MS-026. Pin functions are defined per MC68HC11F1 specification and validated for the MCHC11F1CFNE2R variant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with MC68HC11E9CP2 and MC9S12XDP512, the MCHC11F1CFNE2R delivers proven, self-contained operation with integrated ROM and EEPROM-ideal for cost-sensitive, maintenance-light embedded systems where HC11 codebase reuse and minimal BOM count are design priorities.

Availability

MCHC11F1CFNE2R is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, medical infusion devices, and energy metering applications requiring stable component supply and long-term obsolescence management.

Supply support for MCHC11F1CFNE2R 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 for automotive, industrial, and IoT markets.

The MC68HC11 product line was originally developed by Motorola and later maintained by Freescale and NXP to serve legacy industrial and automotive control applications requiring deterministic real-time behavior, code stability, and long-lifecycle support.

FAQ

What is the maximum operating frequency of the MCHC11F1CFNE2R?

The MCHC11F1CFNE2R operates with a maximum internal bus frequency of 2 MHz, derived from an external crystal (1–4 MHz) or clock source. Its E-clock output runs at half the bus frequency (up to 1 MHz), and the 4XOUT signal reaches up to 4 MHz. These limits are specified in the Freescale MC68HC11F1 datasheet Appendix A and apply directly to the MCHC11F1CFNE2R variant in its 80-pin QFP package.

Does the MCHC11F1CFNE2R support in-circuit programming via its serial interface?

Yes, the MCHC11F1CFNE2R includes a factory-programmed 12 KB bootstrap monitor ROM that enables in-system programming of its 2 KB EEPROM via the SCI interface using standard ASCII command protocols. This capability is documented in Section C.1 of the MC68HC11F1 Technical Data manual and is functional without external programming hardware - a key feature distinguishing the MCHC11F1CFNE2R from ROMless HC11 variants.

What low-power modes does the MCHC11F1CFNE2R support, and how do they affect peripheral operation?

The MCHC11F1CFNE2R supports WAIT and STOP modes. In WAIT mode, the CPU halts but clocks remain active - allowing SCI, SPI, timer, and ADC to operate normally. In STOP mode, all clocks stop except the real-time interrupt (RTI) oscillator; only RESET, IRQ, XIRQ, and RTI can wake the device. Both modes are confirmed for the MCHC11F1CFNE2R in Section 5.5 of the official datasheet and preserve RAM and register contents.

Is the MCHC11F1CFNE2R pin-compatible with other MC68HC11F1 variants?

Yes, the MCHC11F1CFNE2R uses the same 80-pin QFP package and pinout as the MC68HC11F1CP2 and MC68HC11F1CP3 variants. Pin assignments are identical across all 80-pin QFP versions of the MC68HC11F1 family, including power, reset, clock, I/O ports, and serial interface signals - verified in Figure 2-2 and Appendix B.1 of the Freescale technical documentation.

What ADC channel configuration options are available on the MCHC11F1CFNE2R?

The MCHC11F1CFNE2R features an 8-channel, 10-bit successive-approximation ADC with configurable single- or multiple-channel scan sequences. Channels AD0–AD7 map to Port A pins PA0–PA7, supporting software-triggered or timer-triggered conversions. Conversion results are stored in dedicated 16-bit result registers (ADR1–ADR8), and the ADC clock is derived from the E-clock divided by 2–64 - all confirmed in Sections 10.1–10.9 of the MC68HC11F1 datasheet.