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NXP Semiconductors MC68HC11F1CFN4R2
- Part No.:
- MC68HC11F1CFN4R2
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 68-LCC (J-Lead)
- Datasheet:
-
MC68HC11F1CFN4R2.pdf
- Description:
- IC MCU 8BIT ROMLESS 68PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,243
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Product details
Overview
MC68HC11F1CFN4R2 from Freescale Semiconductor is an 8-bit microcontroller unit (MCU) with 2 KB of on-chip EEPROM, 256 bytes of RAM, and integrated peripherals including SCI, SPI, timer system, and 8-channel 8-bit ADC. It operates at up to 4 MHz internal bus speed in single-chip mode and targets embedded control in automotive sensors, industrial motor controllers, and legacy instrumentation systems.
For engineers reviewing the MC68HC11F1CFN4R2 datasheet, MC68HC11F1CFN4R2 pinout, MC68HC11F1CFN4R2 application, or MC68HC11F1CFN4R2 equivalent, key selection criteria include its 68-pin PLCC package, non-volatile EEPROM programmability, COP watchdog, and compatibility with HC11 assembly toolchains and legacy development hardware like the M68MMDS11 modular system.
Technical Context
The MC68HC11F1CFN4R2 implements the classic HC11 CPU core with 16-bit index registers (X, Y), 16-bit stack pointer, and condition code register supporting seven status flags. Its memory map includes fixed 2 KB EEPROM (0x0000–0x07FF), 256-byte RAM (0x0000–0x00FF in page zero), and 512-byte bootstrap ROM (0xFF80–0xFFFF).
Peripherals are tightly coupled to the CPU via memory-mapped I/O: Port A–G support configurable digital I/O; SCI supports full-duplex asynchronous communication with baud rate generator; SPI operates in master/slave mode with CPHA/CPOL controls; and the 8-channel ADC uses a successive-approximation architecture with software-triggered or timer-triggered conversions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 8-bit HC11 with 16-bit address bus and 68-instruction set compatible with Motorola 6800 |
| Max Bus Frequency | 4 MHz - determines real-time interrupt latency and instruction throughput in single-chip mode |
| On-Chip Memory | 2 KB EEPROM (reprogrammable in-system), 256 B RAM, 512 B ROM - enables standalone boot without external memory |
| ADC | 8-channel, 8-bit successive-approximation - supports analog sensor interfacing with 25 µs conversion time per channel |
| Serial Interfaces | SCI (asynchronous UART) + SPI (synchronous master/slave) - provides dual protocol flexibility for sensor networks or peripheral expansion |
| Timer System | 16-bit timer with 4 input capture, 5 output compare, RTI, and pulse accumulator - enables precise event timing and PWM generation |
| Power Modes | WAIT and STOP modes with wake-on-interrupt - reduces current draw to 10 µA in STOP for battery-backed applications |
Pinout & Package
MC68HC11F1CFN4R2 is housed in a 68-pin Plastic Leaded Chip Carrier (PLCC) package with J-lead configuration, lead pitch of 0.05 inches, and body size 1.150 × 1.150 inches. The package supports socket-based prototyping and industrial reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power pins ensure stable core voltage (5 V ±10%) and low-noise grounding for analog/digital sections |
| RESET | Active-low reset input | Asynchronous hardware reset that initializes CPU registers, disables peripherals, and forces entry into bootstrap ROM |
| XTAL / EXTAL | Crystal oscillator inputs | Supports fundamental-mode quartz crystals (1–4 MHz) or external clock source for precise timing reference |
| E | System clock output | Provides buffered E-clock (½ bus frequency) for synchronizing external logic or secondary MCUs |
| IRQ / XIRQ | Maskable and non-maskable interrupt inputs | Enable prioritized event handling: IRQ for general-purpose interrupts; XIRQ for critical fault recovery |
| PORT A–G | Multi-function digital I/O ports | Configurable as general-purpose I/O, timer inputs/outputs, serial interface signals, or ADC channel selects |
Key Features
| Feature | Design Value |
|---|---|
| In-system EEPROM programming | Enables field firmware updates without removing the MCU; supports byte/row/bulk erase with CONFIG register control |
| Computer Operating Properly (COP) watchdog | Hardware timer requiring periodic service to prevent system lockup; resets CPU if software hangs or fails to respond |
| Real-Time Interrupt (RTI) | Programmable periodic interrupt sourced from internal timer prescaler - used for OS tick, sampling intervals, or background task scheduling |
| SCI wakeup capability | Supports idle-line and address-mark detection to wake MCU from WAIT/STOP mode upon serial activity - extends battery life in remote nodes |
| Memory protection via BPROT register | Prevents accidental overwrite of EEPROM bootloader or critical configuration data during runtime or debug operations |
Applications
| Automotive Engine Sensor Interface | Industrial Motor Control Panel |
|---|---|
Use Scenario: Reading throttle position, coolant temperature, and oxygen sensor analog outputs in engine management units. IC Role / Device Role / Timing Role: Central MCU executing closed-loop control algorithms, managing ADC sampling, and communicating diagnostic data via SCI. Use Value: On-chip 8-channel ADC eliminates external converter; EEPROM stores calibration tables; COP watchdog ensures fail-safe shutdown under fault conditions. | Use Scenario: Monitoring motor current, temperature, and encoder feedback while driving relay banks and indicator LEDs in HVAC or pump controllers. IC Role / Device Role / Timing Role: Real-time controller coordinating PWM timing, safety interlocks, and HMI updates using timer output compare and port I/O. Use Value: 5 output compare channels generate independent PWM waveforms; PORT A–G provide 40+ GPIOs for discrete I/O; STOP mode reduces standby power to <15 µA. |
| Legacy Industrial Instrumentation | Embedded Data Logger |
Use Scenario: Replacing aging 6805-based panel meters and process monitors where long-term firmware stability and hardware compatibility are critical. IC Role / Device Role / Timing Role: Standalone measurement processor acquiring analog inputs, performing linearization, and displaying results via 7-segment drivers. Use Value: Bootstrap ROM enables reliable cold-start; 2 KB EEPROM retains user calibration and setup across power cycles; HC11 instruction set ensures drop-in replacement for existing codebases. | Use Scenario: Battery-powered environmental monitoring node recording temperature, humidity, and voltage levels at fixed intervals over weeks. IC Role / Device Role / Timing Role: Low-power data acquisition controller using RTI for timed sampling and SCI for periodic upload via RS-232 modem. Use Value: WAIT/STOP modes reduce average current to ~20 µA; internal ADC eliminates external signal conditioning; EEPROM stores logged data without external memory. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC11E9CP2 | Same HC11 core but with 512 B EEPROM, no bootstrap ROM, and 84-pin PGA package | Lacks built-in ROM for self-boot; requires external memory for complex applications; larger footprint limits space-constrained designs | Select when higher pin count and expanded I/O are needed, but accept trade-off in boot flexibility and board area |
| MC9S12XDP512 | 16-bit S12X core, 512 KB Flash, CAN interface, and enhanced debugging - not HC11 binary compatible | Targets modern automotive ECUs requiring CAN FD and advanced diagnostics; incompatible with HC11 toolchains and legacy code | Choose only for new designs requiring CAN, larger memory, or future-proofing - not a drop-in replacement |
Compared with MC68HC11F1CFN4R2, MC68HC11E9CP2 offers more I/O but sacrifices boot autonomy and compact packaging, while MC9S12XDP512 delivers scalability and CAN at the cost of complete architectural divergence and toolchain migration.
Availability
MC68HC11F1CFN4R2 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial motor controllers, legacy instrumentation upgrades, and embedded data loggers requiring stable component supply and long-lifecycle support.
Supply support for MC68HC11F1CFN4R2 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 MC68HC11F1CFN4R2 belongs to the HC11 family - a line of 8-bit microcontrollers engineered for deterministic real-time control in resource-constrained environments with emphasis on EEPROM-based field programmability and robust peripheral integration.
FAQ
What is the maximum operating frequency of the MC68HC11F1CFN4R2?
The MC68HC11F1CFN4R2 has a maximum internal bus frequency of 4 MHz in single-chip mode. This corresponds to a 4 MHz E-clock output and defines the upper limit for instruction execution speed, timer resolution, and ADC sampling rate. External crystal or oscillator sources must be selected accordingly, typically between 1 MHz and 4 MHz for stable operation.
Does the MC68HC11F1CFN4R2 support in-circuit programming of its EEPROM?
Yes, the MC68HC11F1CFN4R2 supports in-system EEPROM programming via its built-in bootstrap ROM and standard HC11 serial monitor commands. Users can erase and reprogram EEPROM bytes, rows, or bulk blocks using the PPROG register and CONFIG register controls without removing the device from the target board.
What package type is used for the MC68HC11F1CFN4R2?
The MC68HC11F1CFN4R2 uses a 68-pin Plastic Leaded Chip Carrier (PLCC) package with J-leads. This surface-mount package is socket-compatible, supports reflow soldering, and is documented in Freescale's Mechanical Data Appendix B with dimensions 1.150 × 1.150 inches and 0.05-inch lead pitch.
Can the MC68HC11F1CFN4R2 operate in low-power modes?
Yes, the MC68HC11F1CFN4R2 supports two low-power modes: WAIT and STOP. In STOP mode, current consumption drops to approximately 10 µA while retaining RAM and register contents; wake-up is possible via RESET, IRQ, XIRQ, or SCI activity. WAIT mode reduces power while keeping the oscillator running for faster wake-up response.
Is the MC68HC11F1CFN4R2 pin-compatible with other HC11 variants?
No, the MC68HC11F1CFN4R2 is not universally pin-compatible with all HC11 devices. While it shares the 68-pin PLCC footprint with some variants like the MC68HC11A8, differences in peripheral mapping, reset behavior, and memory configuration require verification against specific device datasheets before substitution.
MC68HC11F1CFN4R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 68-LCC (J-Lead)
- Series:
- HC11
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- HC11
- Core Size:
- 8-Bit
- Speed:
- 4MHz
- Connectivity:
- SCI, SPI
- Peripherals:
- POR, WDT
- Number of I/O:
- 30
- Program Memory Size:
- -
- Program Memory Type:
- ROMless
- EEPROM Size:
- 512 x 8
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 4.75V ~ 5.25V
- Data Converters:
- A/D 8x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC68HC11F1CFN4R2 FAQ
1.How can I place an order for MC68HC11F1CFN4R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC11F1CFN4R2 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 MC68HC11F1CFN4R2 reliable?
The price and inventory of MC68HC11F1CFN4R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC11F1CFN4R2 is usually 5 days.
3.What payment methods are accepted for MC68HC11F1CFN4R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68HC11F1CFN4R2 transactions.
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4.How is shipping managed for MC68HC11F1CFN4R2?
MC68HC11F1CFN4R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC11F1CFN4R2 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 MC68HC11F1CFN4R2?
For technical support, including MC68HC11F1CFN4R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC11F1CFN4R2 requirements.
6.How does Aetrix verify that MC68HC11F1CFN4R2 is sourced from the original manufacturer or authorized distributors?
All MC68HC11F1CFN4R2 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 MC68HC11F1CFN4R2 meets industry standards.
7.What is the process for return or replacement of MC68HC11F1CFN4R2?
All MC68HC11F1CFN4R2 units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC11F1CFN4R2, 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 MC68HC11F1CFN4R2 part is unused and in its original packaging.
Return procedure for MC68HC11F1CFN4R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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