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NXP Semiconductors MC68HC11K1CFUE4
- Part No.:
- MC68HC11K1CFUE4
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 80-QFP
- Datasheet:
-
MC68HC11K1CFUE4.pdf
- Description:
- IC MCU 8BIT ROMLESS 80QFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,267
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Product details
Overview
MC68HC11K1CFUE4 from Freescale Semiconductor is an 8-bit HCMOS microcontroller unit (MCU) featuring 512 bytes of EEPROM, 512 bytes of RAM, and 24 KB of on-chip ROM. It integrates a 16-bit timer system with input capture, output compare, pulse accumulator, and real-time interrupt functions, plus an 8-channel 8-bit analog-to-digital converter. It is used in industrial control modules requiring deterministic timing, sensor interfacing, and embedded firmware execution.
For engineers reviewing the MC68HC11K1CFUE4 datasheet, MC68HC11K1CFUE4 pinout, MC68HC11K1CFUE4 application, or MC68HC11K1CFUE4 equivalent, key selection criteria include its 84-pin PLCC package, single-chip mode operation, on-chip COP watchdog, SCI/SPI serial interfaces, and EEPROM retention over 10 years at 25°C.
Technical Context
The MC68HC11K1CFUE4 implements the M68HC11 CPU core with 64 KB address space, supporting single-chip, expanded, and bootstrap operating modes. Its memory subsystem includes mask-programmed 24 KB ROM, user-programmable 512-byte EEPROM, and 512-byte RAM - all mapped into a unified address space with configurable chip selects for external expansion.
Peripherals include a full-duplex Serial Communications Interface (SCI), synchronous Serial Peripheral Interface (SPI), 16-bit timer with four input capture/compare channels, 8-channel 8-bit A/D converter with multiplexer, and programmable pulse-width modulation outputs. All are controlled via dedicated memory-mapped registers accessible in both single-chip and expanded modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M68HC11 8-bit CISC architecture with 64 KB address space and 2 MHz–4 MHz bus clock support |
| ROM Size | 24 KB mask-programmed ROM containing monitor firmware and application code storage |
| EEPROM | 512 bytes with >100,000 write/erase cycles and >10-year data retention at 25°C |
| RAM | 512 bytes static RAM for stack, variables, and temporary data buffering |
| A/D Converter | 8-channel, 8-bit successive-approximation ADC with software-selectable conversion time (8–16 µs) |
| Timer System | 16-bit free-running counter with 4 input capture, 5 output compare, pulse accumulator, and RTI channels |
| Serial Interfaces | One asynchronous SCI (UART-compatible) and one synchronous SPI master/slave interface |
| Operating Voltage | 5.0 V ±10% supply; supports extended temperature range (–40°C to +85°C) |
Pinout & Package
MC68HC11K1CFUE4 is housed in an 84-pin Plastic-Leaded Chip Carrier (PLCC) package per Motorola case number 780, with 0.050-inch lead pitch and JEDEC-standard footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Digital core power (5 V) and return; separate AVDD/AVSS pins provided for analog section isolation |
| XTAL, EXTAL | Clock oscillator inputs | Drive internal crystal oscillator or accept external clock source up to 4 MHz |
| RESET | Active-low reset input | Asynchronous hardware reset; initiates cold start sequence and register initialization |
| IRQ, XIRQ | Interrupt request inputs | Maskable (IRQ) and non-maskable (XIRQ) level-sensitive interrupt triggers |
| PORTA–PORTH | Multi-function I/O ports | Eight bidirectional ports (A–H); Port A includes A/D input channels; Port D supports SPI signals |
| SCI1_TXD, SCI1_RXD | Serial transmit/receive | Asynchronous full-duplex UART interface with programmable baud rate generator |
| MISO, MOSI, SCK, SS | SPI interface signals | Master In Slave Out, Master Out Slave In, Serial Clock, and Slave Select for synchronous peripheral communication |
| E | External clock output | Provides synchronized E-clock (½ bus clock) for external logic timing coordination |
Key Features
| Feature | Design Value |
|---|---|
| On-chip COP watchdog | Configurable computer operating properly timer prevents runaway code via automatic reset if not serviced within timeout window |
| Memory security | CONFIG register enables EEPROM/RAM lock bits to prevent unauthorized read/write access during debug or field operation |
| Low-power modes | Wait, Stop, and Slow modes reduce current consumption to <10 µA (Stop) for battery-backed applications |
| Bootloader ROM | Pre-programmed 512-byte monitor in ROM supports in-system programming via SCI without external programmer |
| Hardware PWM | Four independent PWM channels with programmable period, duty cycle, polarity, and prescaler for motor/servo control |
| Real-time interrupt | Programmable RTI generates periodic interrupts at intervals from 4.096 ms to 262.144 ms using internal timer prescaler |
Applications
| Industrial Motor Control | Automotive Body Controller |
|---|---|
Use Scenario: Closed-loop DC motor speed regulation in conveyor systems using tachometer feedback and PWM drive. IC Role / Device Role / Timing Role: MCU executes PID algorithm, reads A/D tach signal, updates PWM duty cycle, and manages fault detection via IRQ/XIRQ. Use Value: On-chip 8-bit A/D, 4-channel PWM, and real-time interrupt enable deterministic 10 ms control loop timing without external components. | Use Scenario: Centralized lighting, wiper, and door lock control in legacy automotive platforms with minimal BOM cost. IC Role / Device Role / Timing Role: Main controller executing CAN-adjacent discrete I/O logic, managing timed relay actuation, and monitoring switch inputs. Use Value: 84-pin PLCC provides sufficient I/O (Port A–H) for 32+ discrete signals; EEPROM stores calibration and configuration across ignition cycles. |
| Smart Sensor Transmitter | Legacy Industrial PLC I/O Module |
Use Scenario: 4–20 mA current-loop transmitter for pressure/temperature sensors with digital compensation and diagnostics. IC Role / Device Role / Timing Role: Signal conditioner and protocol handler: digitizes sensor output, applies linearization, and drives analog output stage via DAC-equivalent PWM + filter. Use Value: Integrated 8-channel A/D, programmable gain (via external op-amp config), and EEPROM store sensor-specific coefficients persistently. | Use Scenario: DIN-rail mounted digital input/output expansion module for Modbus RTU networks in factory automation. IC Role / Device Role / Timing Role: Protocol bridge and I/O manager: parses Modbus frames via SCI, updates Port B/C/D states, and reports status via RS-485 transceiver. Use Value: Single-chip mode eliminates external memory, reducing PCB area; SCI supports half-duplex RS-485 with hardware flow control via RTS pin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC11E9CP | Same CPU core but 512-byte RAM, 2 KB EEPROM, no on-chip ROM; requires external program memory | Suitable for designs needing field-upgradable firmware stored in external EPROM/Flash | Select when boot flexibility and external memory expansion outweigh integrated ROM convenience |
| MC912B32CPVE | Enhanced 68HC12 core, 32 KB Flash, 2 KB RAM, CAN 2.0B interface, higher clock speed (8 MHz) | Required for CAN-based vehicle networks or applications demanding larger code space and faster throughput | Choose for new designs needing CAN connectivity or >24 KB program memory; not pin-compatible |
Compared with MC68HC11E9CP and MC912B32CPVE, the MC68HC11K1CFUE4 offers fixed 24 KB ROM for secure, tamper-resistant firmware deployment and lower BOM count, while trading off field upgradeability and CAN capability - making it optimal for cost-sensitive, function-stable embedded controllers.
Availability
MC68HC11K1CFUE4 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, smart sensor transmitters, and legacy PLC I/O modules requiring stable component supply and long-lifecycle support.
Supply support for MC68HC11K1CFUE4 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, analog, and mixed-signal ICs for automotive, industrial, and consumer markets.
The MC68HC11K1CFUE4 belongs to the M68HC11K family - a line of cost-optimized, EEPROM-equipped microcontrollers targeting deterministic real-time control in resource-constrained environments.
FAQ
What is the maximum operating frequency of the MC68HC11K1CFUE4?
The MC68HC11K1CFUE4 operates with a maximum bus clock frequency of 4 MHz, derived from an external crystal (up to 4 MHz) or ceramic resonator connected to XTAL/EXTAL pins. Its internal CPU core runs at this bus clock rate, enabling instruction execution at approximately 1 million instructions per second (MIPS) under typical conditions. The E-clock output is phase-locked to half the bus clock for synchronous peripheral timing.
Does the MC68HC11K1CFUE4 support in-system programming (ISP)?
Yes, the MC68HC11K1CFUE4 supports in-system programming via its built-in 512-byte bootloader ROM. Using the SCI interface and Freescale's BUFFALO monitor protocol, users can download and program the on-chip EEPROM without removing the device from the circuit. This capability enables field firmware updates and eliminates the need for external EPROM programmers during development or maintenance.
What are the memory protection features of the MC68HC11K1CFUE4?
The MC68HC11K1CFUE4 implements memory security through the CONFIG register, which controls EEPROM and RAM lock bits. When enabled, these bits prevent read access to protected memory regions during background debug mode and inhibit write operations to EEPROM unless explicitly unlocked via a specific register sequence. This protects firmware IP and calibrated parameters from accidental or malicious overwrite.
Can the MC68HC11K1CFUE4 operate in low-power modes for battery-powered applications?
Yes, the MC68HC11K1CFUE4 supports three low-power modes: Wait, Stop, and Slow. In Stop mode, current consumption drops below 10 µA while retaining RAM and register contents, making it suitable for intermittent wake-up applications like sensor polling. Wake-up sources include RESET, IRQ, XIRQ, and RTI - allowing precise event-driven operation without continuous CPU activity.
Is the MC68HC11K1CFUE4 pin-compatible with other M68HC11K family members?
The MC68HC11K1CFUE4 uses the 84-pin PLCC (case 780) package, matching pinouts with other 84-pin variants in the M68HC11K family such as the MC68HC11K4CFUE4. However, it is not pin-compatible with 68-pin or 80-pin derivatives (e.g., MC68HC11KS2) due to differing pin counts and signal allocations. Always verify package dimensions and pin assignments against the specific device's mechanical drawing before PCB layout.
MC68HC11K1CFUE4 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:
- 4MHz
- 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:
MC68HC11K1CFUE4 FAQ
1.How can I place an order for MC68HC11K1CFUE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC11K1CFUE4 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 MC68HC11K1CFUE4 reliable?
The price and inventory of MC68HC11K1CFUE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC11K1CFUE4 is usually 5 days.
3.What payment methods are accepted for MC68HC11K1CFUE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68HC11K1CFUE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68HC11K1CFUE4?
MC68HC11K1CFUE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC11K1CFUE4 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 MC68HC11K1CFUE4?
For technical support, including MC68HC11K1CFUE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC11K1CFUE4 requirements.
6.How does Aetrix verify that MC68HC11K1CFUE4 is sourced from the original manufacturer or authorized distributors?
All MC68HC11K1CFUE4 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 MC68HC11K1CFUE4 meets industry standards.
7.What is the process for return or replacement of MC68HC11K1CFUE4?
All MC68HC11K1CFUE4 units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC11K1CFUE4, 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 MC68HC11K1CFUE4 part is unused and in its original packaging.
Return procedure for MC68HC11K1CFUE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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