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NXP Semiconductors MC68HC11K1CFNE3
- Part No.:
- MC68HC11K1CFNE3
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
MC68HC11K1CFNE3.pdf
- Description:
- IC MCU 8BIT ROMLESS 84PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,950
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Product details
Overview
MC68HC11K1CFNE3 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 system with input capture/output compare, 8-channel 8-bit ADC, SCI and SPI serial interfaces, and operates at up to 2 MHz internal bus frequency. It is used in automotive body control modules and industrial sensor interface applications.
For engineers reviewing the MC68HC11K1CFNE3 datasheet, MC68HC11K1CFNE3 pinout, MC68HC11K1CFNE3 application, or MC68HC11K1CFNE3 equivalent, key selection criteria include EEPROM endurance (10,000 write/erase cycles), single-chip mode operation, analog input channel count (8), and compatibility with legacy M68HC11 development tools and bootloaders.
Technical Context
The MC68HC11K1CFNE3 implements the classic M68HC11 CPU core with full instruction set compatibility, including indexed addressing and 16-bit arithmetic. Its memory architecture supports single-chip, expanded, and bootstrap modes, with dedicated CONFIG register control for EEPROM security and boot options.
It features dual serial interfaces (SCI and SPI), a programmable 16-bit timer subsystem supporting input capture, output compare, pulse accumulation, and real-time interrupt, plus an 8-channel 8-bit successive-approximation ADC with software-selectable conversion speed and reference voltage options (VRL/VRH).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M68HC11 8-bit CISC core, fully compatible with HC11 instruction set and addressing modes |
| Max Bus Frequency | 2 MHz - determines maximum peripheral timing and instruction throughput in single-chip mode |
| On-Chip Memory | 24 KB ROM + 512 B EEPROM + 512 B RAM - enables standalone operation without external memory |
| ADC | 8-channel 8-bit SAR converter with selectable conversion time (4–27 µs) and VRL/VRH reference inputs |
| Timer System | 16-bit free-running counter with 4 input capture, 5 output compare channels, pulse accumulator, and RTI |
| Serial Interfaces | One asynchronous SCI (UART-like) and one synchronous SPI - support sensor communication and host interfacing |
| Package | 84-pin PLCC (Case 780) - surface-mount compatible with standard reflow profiles and socketing |
Pinout & Package
MC68HC11K1CFNE3 is housed in an 84-pin Plastic-Leaded Chip Carrier (PLCC, Case 780) with 0.050" lead pitch and JEDEC-standard footprint. The package supports through-hole and surface-mount assembly and provides full I/O access across Ports A–H.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Digital core power (5 V ±10%) and return; separate AVDD/AVSS pins available for analog section isolation |
| XTAL / EXTAL | Crystal oscillator input/output | Supports 1–4 MHz crystal or external clock source; drives internal PLL-equivalent frequency synthesis |
| RESET | Active-low reset input | Asynchronous hardware reset; initiates cold start sequence and clears CPU registers and peripherals |
| IRQ / XIRQ | Maskable and non-maskable interrupt inputs | Enable prioritized event handling: IRQ for peripherals, XIRQ for critical faults or debug triggers |
| PORTA[7:0] | Analog input / digital I/O | 8-bit bidirectional port; pins double as ADC input channels (AN0–AN7) in single-chip mode |
| PORTB[7:0] | Digital I/O / timer I/O | Bidirectional port; includes OC1–OC4 and IC1–IC4 signal routing for PWM and timing functions |
| SCI TXD / RXD | Serial transmit/receive data | Full-duplex UART-compatible interface; supports baud rates up to 19.2 kbps at 2 MHz bus clock |
| SPI MOSI/MISO/SCK/SS | Serial peripheral interface signals | Master/slave synchronous communication; supports daisy-chain and multi-slave configurations |
Key Features
| Feature | Design Value |
|---|---|
| On-chip EEPROM (512 B) | Persistent nonvolatile storage for calibration data or configuration parameters; 10,000 write/erase cycles rated |
| Single-chip mode operation | Self-contained execution without external memory or glue logic; reduces BOM and board space |
| Configurable ADC reference | VRL/VRH pins allow user-defined analog input range (e.g., 0–2.5 V or 0–5 V), improving measurement resolution |
| Bootloader ROM | Factory-programmed 512-byte monitor enabling in-system programming via SCI without external programmer |
| COP watchdog timer | Configurable computer operating properly (COP) circuit prevents runaway code; reset triggered on timeout or illegal opcode |
Applications
| Automotive Body Control | Industrial Sensor Interface |
|---|---|
Use Scenario: Centralized control of door locks, window lifts, and interior lighting in passenger vehicles. IC Role / Device Role / Timing Role: Main MCU executing real-time control logic, reading switch inputs, driving relays and LEDs, and communicating via SCI with dashboard cluster. Use Value: Integrated EEPROM stores user preferences (e.g., auto-up/down settings); 8-bit ADC monitors battery voltage and temperature sensors directly. | Use Scenario: Data acquisition node collecting temperature, pressure, and humidity from analog sensors in factory automation systems. IC Role / Device Role / Timing Role: Local sensor hub performing signal conditioning, digitization, and protocol translation before forwarding data via SPI to a master controller. Use Value: On-chip 8-channel ADC eliminates external multiplexer; SCI enables ASCII-based telemetry over RS-232/485 links. |
| Legacy Equipment Retrofit | Education & Training Platform |
Use Scenario: Replacement controller for aging HVAC controllers where original MC68HC11-based firmware must remain functional. IC Role / Device Role / Timing Role: Pin- and code-compatible drop-in replacement preserving existing PCB layout and software binary. Use Value: Full M68HC11 instruction set and memory map compatibility ensures zero firmware modification; PLCC package matches legacy sockets. | Use Scenario: Microcontroller lab platform for teaching embedded systems, assembly language, and real-time peripheral programming. IC Role / Device Role / Timing Role: Pedagogical MCU demonstrating interrupt-driven I/O, timer-based PWM, and serial protocol implementation. Use Value: Visible port mapping and documented register-level control enable step-by-step debugging; bootloader supports student code upload via terminal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC11E9CP2 | Same CPU core but 512 B RAM, 512 B EEPROM, 12 KB ROM; 56-pin DIP package; no PORTF/G/H | Limited I/O count and no SPI; suitable only for simpler control tasks with minimal peripheral needs | Select when board space allows DIP and system requires fewer timers/ADC channels |
| MC912B32CPV | Enhanced 16-bit HCS12 core; 32 KB Flash, 2 KB RAM; higher performance, CAN interface, no native M68HC11 code compatibility | Requires full firmware rewrite; adds CAN bus support but removes direct HC11 toolchain compatibility | Choose for new designs needing CAN or >2 MHz throughput; not a drop-in replacement |
Compared with MC68HC11E9CP2, MC68HC11K1CFNE3 offers more ROM (24 KB vs. 12 KB), full 84-pin I/O expansion, and SPI-critical for sensor networks. Versus MC912B32CPV, it retains legacy toolchain and binary compatibility but lacks CAN and Flash endurance; ideal for cost-sensitive, long-lifecycle HC11-based systems.
Availability
MC68HC11K1CFNE3 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, legacy equipment retrofit, and educational embedded labs requiring stable component supply and long-term obsolescence management.
Supply support for MC68HC11K1CFNE3 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 MC68HC11K1CFNE3 belongs to the M68HC11K family-a cost-optimized, high-reliability 8-bit MCU line targeting automotive body electronics and industrial control where deterministic real-time response and EEPROM-based configuration persistence are essential.
FAQ
What is the maximum operating frequency of the MC68HC11K1CFNE3?
The MC68HC11K1CFNE3 has a maximum internal bus frequency of 2 MHz. This is derived from its crystal oscillator input (typically 4 MHz) divided by two internally. All peripheral timing-including ADC conversion, SCI baud rate generation, and timer overflow-is synchronized to this bus clock, making it the fundamental timing reference for system design.
Does the MC68HC11K1CFNE3 support in-system programming (ISP)?
Yes, the MC68HC11K1CFNE3 supports in-system programming via its built-in 512-byte bootloader ROM. Using the SCI interface and standard ASCII command protocol, users can erase and reprogram the on-chip EEPROM without removing the device from the board-enabling field updates and calibration data loading during production or maintenance.
How many analog input channels does the MC68HC11K1CFNE3 have, and what is their resolution?
The MC68HC11K1CFNE3 includes eight analog input channels (AN0–AN7), mapped to Port A pins, with 8-bit resolution. Conversion time is software-selectable between 4 µs (fastest) and 27 µs (highest noise immunity), and the reference voltage range is configurable using external VRL and VRH connections.
Is the MC68HC11K1CFNE3 pin-compatible with other M68HC11K family members?
Yes, the MC68HC11K1CFNE3 in the 84-pin PLCC package shares identical pinout with other 84-pin M68HC11K variants (e.g., MC68HC11K4CFNE3). However, differences in on-chip ROM size, EEPROM configuration bits, and default reset vector behavior require verification against the specific device's memory map and CONFIG register settings before substitution.
What development tools are supported for the MC68HC11K1CFNE3?
The MC68HC11K1CFNE3 is supported by legacy Freescale tools including the BUFFALO monitor (via SCI), P&E Micro's MULTILINK debugger, and CodeWarrior Development Studio for HC11. Its bootloader also enables programming using simple terminal emulators and ASCII-based command sets, reducing dependency on proprietary hardware debuggers.
MC68HC11K1CFNE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 84-LCC (J-Lead)
- Series:
- HC11
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- HC11
- Core Size:
- 8-Bit
- Speed:
- 3MHz
- Connectivity:
- SCI, SPI
- Peripherals:
- POR, PWM, WDT
- Number of I/O:
- 37
- Program Memory Size:
- -
- Program Memory Type:
- ROMless
- EEPROM Size:
- 640 x 8
- RAM Size:
- 768 x 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Data Converters:
- A/D 8x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC68HC11K1CFNE3 FAQ
1.How can I place an order for MC68HC11K1CFNE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC11K1CFNE3 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC68HC11K1CFNE3 reliable?
The price and inventory of MC68HC11K1CFNE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC11K1CFNE3 is usually 5 days.
3.What payment methods are accepted for MC68HC11K1CFNE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68HC11K1CFNE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68HC11K1CFNE3?
MC68HC11K1CFNE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC11K1CFNE3 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC68HC11K1CFNE3?
For technical support, including MC68HC11K1CFNE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC11K1CFNE3 requirements.
6.How does Aetrix verify that MC68HC11K1CFNE3 is sourced from the original manufacturer or authorized distributors?
All MC68HC11K1CFNE3 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC68HC11K1CFNE3 meets industry standards.
7.What is the process for return or replacement of MC68HC11K1CFNE3?
All MC68HC11K1CFNE3 units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC11K1CFNE3, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC68HC11K1CFNE3 part is unused and in its original packaging.
Return procedure for MC68HC11K1CFNE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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