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NXP Semiconductors MC68HC11E0CFN2
- Part No.:
- MC68HC11E0CFN2
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
MC68HC11E0CFN2.pdf
- Description:
- IC MCU 8BIT ROMLESS 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,991
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Product details
Overview
MC68HC11E0CFN2 from Freescale Semiconductor is an 8-bit microcontroller featuring 512 bytes of on-chip RAM, 256 bytes of EEPROM, and 512 bytes of EPROM. It integrates a 16-bit timer subsystem with input capture/output compare, 8-channel 8-bit ADC, dual serial interfaces (SCI and SPI), and parallel I/O ports. Designed for embedded control in automotive sensors and industrial motor controllers, it operates at up to 2 MHz bus speed with single-chip mode execution.
For engineers reviewing the MC68HC11E0CFN2 datasheet, MC68HC11E0CFN2 pinout, MC68HC11E0CFN2 application, or MC68HC11E0CFN2 equivalent, key selection criteria include its integrated EPROM/EEPROM memory architecture, 52-pin PLCC package, bootstrap programming capability, and support for COP watchdog and real-time interrupt functions in resource-constrained systems.
Technical Context
The MC68HC11E0CFN2 implements the M68HC11 CPU core with Harvard architecture, supporting single-chip and expanded modes via STRA/AS and STRB/R/W control signals. Its memory map includes fixed register space, configurable RAM/I/O mapping, and non-volatile program storage with EPROM programming via on-chip control logic.
Timing is derived from an external crystal (1–4 MHz) or ceramic resonator driving the XTAL/EXTAL pins, generating an internal E-clock synchronized to the bus frequency. The device supports wait/stop low-power modes and features a programmable computer operating properly (COP) watchdog with timeout options selectable via configuration registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M68HC11 8-bit CISC core with 16-bit address bus and index registers IX/IY |
| Bus Speed | 2 MHz maximum - defines instruction cycle timing and peripheral interface bandwidth |
| On-Chip Memory | 512 B RAM + 256 B EEPROM + 512 B EPROM - enables self-contained firmware execution without external memory |
| ADC | 8-channel 8-bit successive-approximation ADC with software-selectable conversion sequence |
| Serial Interfaces | SCI (asynchronous UART) and SPI (synchronous master/slave) - support sensor interfacing and daisy-chain peripheral control |
| Timer System | 16-bit timer with 4 input capture, 5 output compare channels, pulse accumulator, and RTI - suitable for PWM generation and event timing |
| Supply Voltage | 5.0 V ±10% - compatible with standard TTL/CMOS logic levels and legacy automotive power rails |
Pinout & Package
MC68HC11E0CFN2 is housed in a 52-pin Plastic-Leaded Chip Carrier (PLCC) package per Case 778 mechanical specification, with gull-wing leads and center power/ground pads for thermal stability in industrial environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD/VSS pairs ensure stable core and I/O rail decoupling; required for noise immunity in motor control applications |
| XTAL, EXTAL | Crystal/resonator interface | Drives internal oscillator; supports 1–4 MHz crystals for precise timing control of SCI baud rate and ADC sampling |
| E | External clock output | Provides synchronous E-clock signal for external logic or glueless expansion bus timing coordination |
| RESET | Active-low reset input | Asynchronous hardware reset that initializes CPU registers, disables peripherals, and forces boot vector fetch |
| IRQ, XIRQ/VPPE | Maskable and non-maskable interrupt inputs | Supports priority-based interrupt handling; XIRQ used for critical fault recovery or EPROM programming entry |
| PORT A–E | Configurable parallel I/O | Port A: 8-bit bidirectional; Port B: 8-bit with handshake control; Ports C/D/E: mixed function (ADC, SCI, SPI, timer I/O) |
Key Features
| Feature | Design Value |
|---|---|
| On-chip EPROM programming | Enables field firmware updates using bootstrap mode and standard 5 V supply-no external programmer required |
| EEPROM data retention | 10-year minimum data retention at 85°C-supports calibration storage and configuration persistence across power cycles |
| COP watchdog timer | Programmable timeout (0.5 ms to 1.0 s) with software-reset capability-prevents runaway code in safety-critical control loops |
| Single-chip mode operation | Eliminates need for external address/data bus buffers or latches-reduces BOM count and PCB area in compact designs |
| Bootstrap programming interface | Uses SCI port and predefined memory map to load new firmware via RS-232-enables remote updates in deployed systems |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Controller |
|---|---|
Use Scenario: Real-time monitoring of throttle position, coolant temperature, and crankshaft angle in 4-cylinder engine management. IC Role / Device Role / Timing Role: Central controller executing fuel injection timing, spark advance calculation, and closed-loop idle speed regulation. Use Value: Integrated 8-bit ADC and 16-bit timer with input capture enable precise sensor sampling and ignition timing synchronization within 1 µs resolution. | Use Scenario: Closed-loop speed and torque control of 3-phase AC induction motors in HVAC blowers and conveyor systems. IC Role / Device Role / Timing Role: Pulse-width modulator generator and feedback processor interfacing with Hall-effect sensors and gate drivers. Use Value: Output compare channels produce synchronized PWM signals; SPI interface communicates with isolated current-sense ICs for overcurrent protection. |
| Smart Sensor Node | Legacy Industrial PLC I/O Module |
Use Scenario: Self-contained pressure/temperature transducer with digital output for factory floor instrumentation networks. IC Role / Device Role / Timing Role: Signal conditioner, ADC manager, and RS-485 protocol handler using SCI with address-mark wakeup. Use Value: On-chip EEPROM stores sensor calibration coefficients; COP watchdog ensures reliable operation during network polling intervals. | Use Scenario: Retrofit digital I/O expansion module for aging Allen-Bradley SLC-500 PLC systems requiring discrete input scanning and relay drive outputs. IC Role / Device Role / Timing Role: Parallel port aggregator translating 24 VDC field signals into 5 V logic levels and driving opto-isolated outputs. Use Value: PORT B handshake protocol enables deterministic scan-cycle timing; 52-pin PLCC fits existing socket footprints in legacy backplane designs. |
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 and peripheral set but with 512 B EPROM only (no EEPROM); requires external NV memory for data logging | Lacks on-chip EEPROM-unsuitable for applications requiring persistent parameter storage without external components | Select when firmware size exceeds 512 B and external memory is already present in system architecture |
| MC68HC11F1CFN2 | Enhanced variant with 2 KB ROM, 256 B RAM, and added CAN 2.0A controller; pin-compatible in 52-pin PLCC package | Includes native CAN interface-required for J1939 or ISO 11898-compliant vehicle networks where MC68HC11E0CFN2 lacks bus support | Choose when upgrading from legacy designs needing CAN connectivity while retaining identical PCB layout and power delivery |
Compared with MC68HC11E0CFN2, the MC68HC11E9CP sacrifices data retention capability for lower cost in fixed-function firmware deployments, while the MC68HC11F1CFN2 extends functionality with CAN without altering mechanical fit-making it ideal for automotive network integration where bus communication is mandatory.
Availability
MC68HC11E0CFN2 is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drives, smart sensor nodes, and legacy PLC I/O modules requiring stable component supply and long-term obsolescence management.
Supply support for MC68HC11E0CFN2 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 for automotive, industrial, and networking markets.
The MC68HC11E family was engineered for cost-sensitive, real-time control applications demanding integrated memory, robust I/O, and field-programmability-targeting engine management, appliance control, and industrial automation systems.
FAQ
What is the maximum operating frequency of the MC68HC11E0CFN2?
The MC68HC11E0CFN2 supports a maximum bus frequency of 2 MHz, derived from an external crystal or resonator connected to XTAL/EXTAL pins. This corresponds to a 4 MHz oscillator input with internal divide-by-two, enabling instruction execution at approximately 500 ns per cycle. The E-clock output reflects this timing and must be used for synchronous peripheral interfacing.
Does the MC68HC11E0CFN2 support in-system programming?
Yes, the MC68HC11E0CFN2 supports in-system programming via its bootstrap mode, which uses the built-in SCI interface to receive new firmware over RS-232. This eliminates the need for external EPROM programmers and allows field updates using standard PC tools like PCbug11, provided the security features have not been enabled.
What memory types are integrated into the MC68HC11E0CFN2?
The MC68HC11E0CFN2 integrates 512 bytes of EPROM for program storage, 256 bytes of EEPROM for non-volatile data storage, and 512 bytes of RAM for runtime variables and stack operations. All memory blocks are mapped into a unified 64 KB address space with dedicated control registers for read/write/erase access.
How does the COP watchdog function in the MC68HC11E0CFN2?
The COP watchdog in the MC68HC11E0CFN2 is a free-running timer that resets the device if not cleared by software within a programmable window (0.5 ms to 1.0 s). It is enabled via the COPCTL register and requires periodic writes to the $FF09 address to prevent timeout-ensuring system recovery from software hangs in safety-critical applications.
Is the MC68HC11E0CFN2 pin-compatible with other members of the M68HC11E family?
Yes, the MC68HC11E0CFN2 shares identical pinout and electrical characteristics with other 52-pin PLCC variants in the M68HC11E family, including the MC68HC11E9CP and MC68HC11F1CFN2. This allows direct substitution in existing designs when memory or peripheral requirements change, provided firmware and configuration registers are updated accordingly.
MC68HC11E0CFN2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 52-LCC (J-Lead)
- Series:
- HC11
- Packaging:
- Tube
- 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:
MC68HC11E0CFN2 FAQ
1.How can I place an order for MC68HC11E0CFN2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC11E0CFN2 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 MC68HC11E0CFN2 reliable?
The price and inventory of MC68HC11E0CFN2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC11E0CFN2 is usually 5 days.
3.What payment methods are accepted for MC68HC11E0CFN2?
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4.How is shipping managed for MC68HC11E0CFN2?
MC68HC11E0CFN2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC11E0CFN2 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 MC68HC11E0CFN2?
For technical support, including MC68HC11E0CFN2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC11E0CFN2 requirements.
6.How does Aetrix verify that MC68HC11E0CFN2 is sourced from the original manufacturer or authorized distributors?
All MC68HC11E0CFN2 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 MC68HC11E0CFN2 meets industry standards.
7.What is the process for return or replacement of MC68HC11E0CFN2?
All MC68HC11E0CFN2 units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC11E0CFN2, 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 MC68HC11E0CFN2 part is unused and in its original packaging.
Return procedure for MC68HC11E0CFN2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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