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NXP Semiconductors MC68HC11K1CFUE3
- Part No.:
- MC68HC11K1CFUE3
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 80-QFP
- Datasheet:
-
MC68HC11K1CFUE3.pdf
- Description:
- IC MCU 8BIT ROMLESS 80QFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,020
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Product details
Overview
MC68HC11K1CFUE3 from NXP Semiconductors (formerly Freescale/Motorola) is an 8-bit HCMOS microcontroller unit 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 bus frequency in single-chip mode. It is used in automotive body control modules and industrial sensor interface applications.
For engineers reviewing the MC68HC11K1CFUE3 datasheet, MC68HC11K1CFUE3 pinout, MC68HC11K1CFUE3 application, or MC68HC11K1CFUE3 equivalent, key selection criteria include EEPROM endurance (10,000 write/erase cycles), guaranteed operation over –40°C to +85°C, and compatibility with legacy M68HC11 development tools and assembly-language firmware.
Technical Context
The MC68HC11K1CFUE3 implements the classic M68HC11 CPU core with full instruction set compatibility, including indexed, extended, and relative addressing modes. Its memory architecture supports single-chip, expanded, and bootstrap operating modes, with on-chip ROM mapped at $E000–$FFFF and EEPROM at $D000–$D1FF.
Peripheral integration includes a 16-bit timer subsystem with four input capture registers, three output compare channels, pulse accumulator, real-time interrupt, and PWM capability - all clocked from the internal E-clock derived from the crystal oscillator or external source via XTAL/EXTAL pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M68HC11 8-bit CISC core with 16-bit address bus and 8-bit data bus |
| Max Bus Frequency | 2 MHz - determines maximum instruction throughput and peripheral timing margins |
| On-Chip Memory | 24 KB ROM, 512 B EEPROM (10k cycle endurance), 512 B RAM |
| ADC | 8-channel 8-bit successive-approximation converter with software-triggered conversion |
| Serial Interfaces | SCI (asynchronous UART) and SPI (synchronous master/slave) both fully register-mapped |
| Operating Temp | –40°C to +85°C - validated for under-hood automotive and industrial ambient conditions |
| Supply Voltage | 5.0 V ±10% - compatible with standard TTL logic families and legacy power rails |
Pinout & Package
MC68HC11K1CFUE3 is housed in an 84-pin Plastic-Leaded Chip Carrier (PLCC) package (Case 780), with lead finish SnPb and JEDEC-standard footprint. Pin assignments follow the M68HC11K family layout defined in Section 2 of the technical data manual.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Digital core power (VDD) and return (VSS); separate AVDD/AVSS pins provided for analog section isolation |
| XTAL / EXTAL | Clock input pair | Crystal oscillator connection (XTAL) or external clock source (EXTAL); enables precise timing control for all peripherals |
| RESET | Active-low reset input | Asynchronous hardware reset; initiates cold start sequence and clears CPU registers and peripheral control bits |
| PORT A (PA0–PA7) | 8-bit bidirectional I/O port | Configurable as general-purpose I/O or dedicated ADC input channels (PA0–PA7) |
| PORT B (PB0–PB7) | 8-bit bidirectional I/O port | Supports timer input capture (IC1–IC4), output compare (OC1–OC3), and pulse accumulator functions |
| SCI TXD / RXD | Serial transmit/receive | Full-duplex asynchronous communication using NRZ format; 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 4-wire mode with programmable clock polarity and phase |
Key Features
| Feature | Design Value |
|---|---|
| On-chip EEPROM | 512 bytes with 10,000 write/erase cycles - enables field-upgradable calibration data storage without external memory |
| Single-chip mode | Self-contained operation with no external bus interface required - reduces BOM count and PCB area |
| Computer Operating Properly (COP) watchdog | Programmable timeout (0.5 ms to 1.0 s) with independent clock source - prevents runaway code in safety-critical systems |
| Low-power stop/wait modes | Current draw <100 µA in stop mode - extends battery life in portable or energy-constrained sensor nodes |
| Hardware PWM generation | Four independent PWM channels with programmable period and duty cycle - eliminates need for external timers in motor control or LED dimming |
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 state-machine logic, polling switches, driving relays/LEDs, and communicating via SCI with dashboard cluster. Use Value: On-chip EEPROM stores user preferences (e.g., auto-up/down window position); COP watchdog ensures fail-safe lock actuation during voltage transients. | Use Scenario: Analog sensor signal conditioning and digital reporting in factory-floor temperature/humidity monitors. IC Role / Device Role / Timing Role: ADC digitizes sensor outputs; SCI transmits readings to PLC over RS-232; timer triggers periodic sampling every 500 ms. Use Value: Integrated 8-channel ADC eliminates external multiplexer; 5 V tolerance simplifies interface with legacy 4–20 mA transmitters. |
| Legacy Equipment Retrofit | Education & Training Platform |
Use Scenario: Replacement controller for discontinued OEM HVAC controllers requiring drop-in compatibility. IC Role / Device Role / Timing Role: Pin- and firmware-compatible upgrade path for M68HC11E9-based designs; retains same memory map and interrupt vectors. Use Value: 24 KB ROM provides space for enhanced diagnostics and bootloader; same PLCC-84 footprint avoids PCB redesign. | Use Scenario: Microcontroller lab curriculum teaching assembly programming, peripheral configuration, and real-time interrupt handling. IC Role / Device Role / Timing Role: Instructional MCU demonstrating memory-mapped I/O, SCI echo loopback, and timer-driven LED blinking with precise 1 Hz period. Use Value: Full documentation, free assembler toolchain (HC11ASM), and widely available evaluation boards lower barrier to entry for embedded learning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC11E9CP2 | Same core, 512 B RAM, 512 B EEPROM, but 512 B ROM only; requires external memory expansion for larger code | Limited to smaller firmware footprints; lacks integrated 24 KB ROM | Select when cost-sensitive and code size ≤512 B; verify external memory interface design |
| MC9S12XDP512 | 16-bit HCS12X core, 512 KB flash, CAN interface, higher performance; not binary-compatible | Requires full firmware rewrite; adds CAN bus support for distributed systems | Select for new designs needing CAN, larger memory, or higher throughput; not a drop-in replacement |
Compared with MC68HC11E9CP2, MC68HC11K1CFUE3 offers 24× more on-chip ROM for standalone operation; compared with MC9S12XDP512, it provides proven reliability in legacy environments but lacks modern peripherals like CAN and flash security features.
Availability
MC68HC11K1CFUE3 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, legacy equipment retrofit, and educational embedded systems requiring stable component supply across long product lifecycles.
Supply support for MC68HC11K1CFUE3 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 and later acquisition of Freescale Semiconductor, with deep heritage in automotive and industrial microcontrollers.
The MC68HC11K1CFUE3 belongs to the M68HC11K family, designed specifically for cost-sensitive, high-reliability embedded control applications where deterministic real-time response, EEPROM-based configuration storage, and long-term supply stability are critical.
FAQ
What is the maximum operating frequency of the MC68HC11K1CFUE3?
The MC68HC11K1CFUE3 supports a maximum bus frequency of 2 MHz, derived from its internal clock generator. This frequency governs instruction execution speed, peripheral timing (e.g., SCI baud rate generation), and ADC conversion time. Operation above this limit is not guaranteed and may result in undefined behavior or data corruption.
Does the MC68HC11K1CFUE3 include a hardware watchdog timer?
Yes, the MC68HC11K1CFUE3 includes a Computer Operating Properly (COP) watchdog timer with programmable timeout ranging from 0.5 ms to 1.0 s. It uses an independent RC oscillator and must be serviced by firmware writes to the arm/reset register; failure to do so triggers a hardware reset. This feature is documented in Section 5.3.3 of the M68HC11K Family Technical Data.
How much EEPROM memory does the MC68HC11K1CFUE3 have, and what is its endurance?
The MC68HC11K1CFUE3 contains 512 bytes of on-chip EEPROM, rated for a minimum of 10,000 write/erase cycles per location. This memory retains data without power and is commonly used for storing calibration constants, device IDs, or user settings. Endurance is specified under standard operating conditions (5 V, 25°C) per Freescale's M68HC11K Family datasheet Section 12.13.
Is the MC68HC11K1CFUE3 pin-compatible with other M68HC11 variants?
The MC68HC11K1CFUE3 in the 84-pin PLCC package shares identical pinout with other M68HC11K-series devices in the same package variant (e.g., MC68HC11K4CFUE3), including power, clock, reset, and peripheral signal assignments. However, it is not pin-compatible with 68-pin or 80-pin variants due to differing pin counts and signal mappings.
What development tools support the MC68HC11K1CFUE3?
The MC68HC11K1CFUE3 is supported by legacy Freescale tools including the BUFFALO monitor (bootloader), HI-TECH C compiler, and ASM11 assembler. Hardware debuggers such as the P&E Micro USB-ML-12 and TURBO-PROG programmers provide in-circuit programming and debugging via the MODA/MODB pins. Documentation and toolchains remain publicly archived by NXP.
MC68HC11K1CFUE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 80-QFP
- Series:
- HC11
- Packaging:
- Tray
- 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:
MC68HC11K1CFUE3 FAQ
1.How can I place an order for MC68HC11K1CFUE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC11K1CFUE3 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 MC68HC11K1CFUE3 reliable?
The price and inventory of MC68HC11K1CFUE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC11K1CFUE3 is usually 5 days.
3.What payment methods are accepted for MC68HC11K1CFUE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68HC11K1CFUE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68HC11K1CFUE3?
MC68HC11K1CFUE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC11K1CFUE3 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 MC68HC11K1CFUE3?
For technical support, including MC68HC11K1CFUE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC11K1CFUE3 requirements.
6.How does Aetrix verify that MC68HC11K1CFUE3 is sourced from the original manufacturer or authorized distributors?
All MC68HC11K1CFUE3 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 MC68HC11K1CFUE3 meets industry standards.
7.What is the process for return or replacement of MC68HC11K1CFUE3?
All MC68HC11K1CFUE3 units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC11K1CFUE3, 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 MC68HC11K1CFUE3 part is unused and in its original packaging.
Return procedure for MC68HC11K1CFUE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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