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NXP Semiconductors MC68HC11E0CFNE2R
- Part No.:
- MC68HC11E0CFNE2R
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
MC68HC11E0CFNE2R.pdf
- Description:
- IC MCU 8BIT ROMLESS 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,219
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Product details
Overview
MC68HC11E0CFNE2R from NXP (formerly Freescale) is an 8-bit CISC microcontroller in the M68HC11E family, featuring 512 bytes of on-chip RAM, 12 KB of EPROM, 512 bytes of EEPROM, and integrated peripherals including a 8-channel 8-bit ADC, SCI, SPI, and a 16-bit timer system with input capture/output compare. It operates at up to 2 MHz bus frequency and supports single-chip and expanded modes for embedded control in automotive and industrial systems.
For engineers reviewing the MC68HC11E0CFNE2R datasheet, MC68HC11E0CFNE2R pinout, MC68HC11E0CFNE2R application, or MC68HC11E0CFNE2R equivalent, key selection criteria include its EPROM-based non-volatile program storage, on-chip EEPROM for data retention, bootstrap mode for in-system programming, and compatibility with legacy HC11 development tools and debuggers like PCbug11 and EVBU.
Technical Context
The MC68HC11E0CFNE2R implements the classic M68HC11 CPU core with full instruction set compatibility, supporting both single-chip mode (internal memory only) and expanded mode (external memory interface via AS/RW/STRA/STRB). Its memory map includes dedicated register space, RAM, EPROM, and EEPROM segments mapped to fixed addresses.
Peripherals are memory-mapped and controlled via dedicated registers: the SCI supports asynchronous serial communication with baud rate generation and wakeup features; the SPI provides synchronous master/slave communication; and the 16-bit timer subsystem enables precise timing, pulse width measurement, and waveform generation through four input capture and five output compare channels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M68HC11 8-bit CISC architecture with 64-pin instruction set and full backward compatibility with earlier HC11 variants. |
| Bus Frequency | Up to 2 MHz - determines maximum instruction execution rate and peripheral timing margins in single-chip mode. |
| On-Chip Memory | 12 KB EPROM (program storage), 512 bytes EEPROM (non-volatile data storage), 512 bytes RAM (volatile working memory). |
| ADC | 8-channel 8-bit successive-approximation ADC with programmable conversion sequence and 25 µs typical conversion time per channel. |
| Timer System | 16-bit free-running counter with 4 input capture and 5 output compare channels, enabling PWM generation, event timing, and quadrature decoding. |
| Serial Interfaces | One full-duplex SCI (asynchronous UART) and one synchronous SPI (master/slave), both memory-mapped and interrupt-capable. |
| Operating Voltage | 4.5 V to 5.5 V - standard TTL-compatible supply range; not rated for extended voltage (3.0–5.5 V) operation. |
Pinout & Package
MC68HC11E0CFNE2R is housed in a 52-pin PLCC (Plastic Leaded Chip Carrier) package with J-lead configuration, designed for surface-mount assembly and socketed prototyping. Pinout follows the M68HC11E family standard layout defined in Section 1.4 of the Rev. 5.1 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power pins for noise isolation; require local decoupling (0.1 µF ceramic + 10 µF tantalum) near device. |
| XTAL / EXTAL | Crystal oscillator input/output | Drives internal oscillator circuit; supports 1–4 MHz crystal or external clock source for system timing. |
| E | System clock output | Provides buffered E-clock (½ bus frequency) for synchronizing external logic or peripherals. |
| RESET | Active-low reset input | Asynchronous reset signal; must be held low ≥ 2 E-cycles to initiate hardware reset sequence. |
| XIRQ | Non-maskable interrupt input | Edge-triggered NMI used for critical fault handling or EPROM programming entry (VPPE function). |
| PORT A–E | Programmable I/O ports | Five bidirectional ports (A: 8-bit, B: 8-bit, C: 8-bit, D: 6-bit, E: 8-bit); each with direction control and pull-up options. |
Key Features
| Feature | Design Value |
|---|---|
| Bootstrap Mode | Enables in-system programming via SCI using PCbug11 host software without external EPROM programmer. |
| On-Chip EEPROM | 512 bytes of electrically erasable memory for calibration data, configuration settings, or runtime logging with 10⁵ write cycles. |
| Hardware COP Watchdog | Configurable computer operating properly (COP) timer prevents runaway code by forcing reset if not serviced within timeout window. |
| Real-Time Interrupt (RTI) | Programmable periodic interrupt sourced from internal prescaler chain, usable for task scheduling or low-power wakeups. |
| Security Lock | EEPROM/EPROM security bit prevents unauthorized readout of program memory after programming, protecting firmware IP. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Controller |
|---|---|
Use Scenario: Monitoring engine RPM, throttle position, and coolant temperature while generating spark timing signals. IC Role / Device Role / Timing Role: Central controller executing real-time closed-loop control algorithms using ADC inputs and timer-based PWM outputs. Use Value: On-chip EPROM stores calibrated fuel maps; EEPROM retains adaptive learning parameters across power cycles. | Use Scenario: Regulating speed and direction of DC or stepper motors in factory automation equipment. IC Role / Device Role / Timing Role: Pulse accumulator and output compare channels measure encoder feedback and generate precise motor drive waveforms. Use Value: Integrated 16-bit timer with input capture enables accurate RPM measurement; SPI interfaces with external gate drivers. |
| Legacy Instrumentation System | Embedded Data Logger |
Use Scenario: Replacing obsolete controllers in analog panel meters and process indicators with digital display and analog output. IC Role / Device Role / Timing Role: Reads analog sensor inputs via 8-bit ADC, drives 7-segment displays via Port B/C, and communicates via SCI to HMI. Use Value: Single-chip mode eliminates external memory, reducing BOM cost and board space in space-constrained enclosures. | Use Scenario: Capturing environmental sensor data (temperature, humidity) at fixed intervals and storing locally before upload. IC Role / Device Role / Timing Role: RTI triggers periodic sampling; EEPROM stores timestamped readings; SCI transmits logs to PC over RS-232. Use Value: No external non-volatile memory required - all data retained in on-chip EEPROM with guaranteed 10-year data retention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC11E9CP | Same core and peripheral set, but uses OTPROM instead of EPROM; no UV-erasable window; higher production yield. | Lacks field-reprogrammability - suitable for volume production where firmware is finalized and unchanging. | Select MC68HC11E9CP when firmware stability and cost-per-unit outweigh need for field updates. |
| MC68HC11A8CP | Enhanced variant with 20 KB ROM, added SSI interface, and improved COP watchdog; requires different reset initialization sequence. | Supports more complex protocols and larger code footprints; not binary-compatible due to memory map changes. | Choose MC68HC11A8CP only when migrating legacy designs requiring expanded memory or SSI peripheral support. |
Compared with MC68HC11E9CP and MC68HC11A8CP, the MC68HC11E0CFNE2R offers field-erasable EPROM for iterative development and debugging, making it uniquely suited for prototyping and low-volume embedded control where firmware updates are frequent.
Availability
MC68HC11E0CFNE2R is available at Aetrix Electronics and suitable for automotive engine management, industrial motor control, legacy instrumentation, and embedded data logging applications requiring stable component supply and long-term obsolescence support.
Supply support for MC68HC11E0CFNE2R 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 Freescale Semiconductor and Philips' semiconductor division, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The M68HC11E family was designed for cost-sensitive, real-time embedded control applications requiring high reliability, low power consumption, and robust peripheral integration - particularly in automotive subsystems and industrial equipment.
FAQ
What is the maximum bus frequency supported by the MC68HC11E0CFNE2R?
The MC68HC11E0CFNE2R supports a maximum bus frequency of 2 MHz. This corresponds to a 4 MHz crystal (or external clock) driving the internal oscillator, as the bus clock is derived as half the oscillator frequency. Operation above this limit violates AC timing specifications and may cause undefined behavior in memory access and peripheral register reads/writes. The MC68HC11E0CFNE2R does not support higher-frequency derivatives like the 4 MHz bus versions found in later HC11 variants.
Does the MC68HC11E0CFNE2R support in-system programming, and how is it performed?
Yes, the MC68HC11E0CFNE2R supports in-system programming via Bootstrap Mode. This is initiated by holding MODA and MODB low during reset, then using the SCI interface to download code from a host PC running PCbug11 or compatible software. The MC68HC11E0CFNE2R's on-chip EPROM is programmed directly through this serial path without requiring UV erasure or external programmers, enabling rapid firmware iteration during development.
What are the key differences between the EPROM and EEPROM memory blocks in the MC68HC11E0CFNE2R?
The MC68HC11E0CFNE2R contains 12 KB of EPROM for program storage - UV-erasable, non-volatile, and intended for firmware code that changes infrequently. Its 512-byte EEPROM is electrically erasable in-system, optimized for data storage such as calibration constants or runtime variables. Unlike EPROM, EEPROM supports byte-level writes and has a 10⁵ endurance rating, making it suitable for frequent updates without full chip erasure - a critical distinction for applications requiring persistent state across power cycles.
Can the MC68HC11E0CFNE2R operate from a 3.3 V supply?
No, the MC68HC11E0CFNE2R is specified for operation only within the 4.5 V to 5.5 V supply range. It is not compatible with 3.3 V logic systems. Attempting to power the MC68HC11E0CFNE2R at 3.3 V will result in improper CPU operation, unreliable peripheral function, and potential failure to meet timing specifications. For 3.3 V designs, engineers should consider modern NXP Kinetis or S32K families, not the legacy HC11 platform.
How is the security feature implemented on the MC68HC11E0CFNE2R, and what does it protect?
The MC68HC11E0CFNE2R implements security via a programmable CONFIG register bit that, once set, disables external read access to EPROM and EEPROM contents. This prevents unauthorized firmware extraction via parallel or serial interfaces. Security activation is irreversible - clearing the bit requires full chip erase, which also wipes all program and data memory. The feature protects intellectual property in deployed units but must be enabled only after final firmware validation, as debugging becomes impossible afterward.
MC68HC11E0CFNE2R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 52-LCC (J-Lead)
- Series:
- HC11
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- HC11
- Core Size:
- 8-Bit
- Speed:
- 2MHz
- Connectivity:
- SCI, SPI
- Peripherals:
- POR, WDT
- Number of I/O:
- 38
- Program Memory Size:
- -
- Program Memory Type:
- ROMless
- EEPROM Size:
- -
- RAM Size:
- 512 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:
MC68HC11E0CFNE2R FAQ
1.How can I place an order for MC68HC11E0CFNE2R through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC11E0CFNE2R 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 MC68HC11E0CFNE2R reliable?
The price and inventory of MC68HC11E0CFNE2R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC11E0CFNE2R is usually 5 days.
3.What payment methods are accepted for MC68HC11E0CFNE2R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68HC11E0CFNE2R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68HC11E0CFNE2R?
MC68HC11E0CFNE2R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC11E0CFNE2R 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 MC68HC11E0CFNE2R?
For technical support, including MC68HC11E0CFNE2R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC11E0CFNE2R requirements.
6.How does Aetrix verify that MC68HC11E0CFNE2R is sourced from the original manufacturer or authorized distributors?
All MC68HC11E0CFNE2R 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 MC68HC11E0CFNE2R meets industry standards.
7.What is the process for return or replacement of MC68HC11E0CFNE2R?
All MC68HC11E0CFNE2R units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC11E0CFNE2R, 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 MC68HC11E0CFNE2R part is unused and in its original packaging.
Return procedure for MC68HC11E0CFNE2R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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