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NXP Semiconductors MC68HC11E1CFN2
- Part No.:
- MC68HC11E1CFN2
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
MC68HC11E1CFN2.pdf
- Description:
- IC MCU 8BIT ROMLESS 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,789
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Product details
Overview
MC68HC11E1CFN2 from Freescale Semiconductor is an 8-bit 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, two 16-bit timer modules (with input capture/output compare), SCI and SPI serial interfaces, and parallel I/O ports. It operates at up to 2 MHz bus speed and supports single-chip and expanded modes for embedded control in automotive and industrial systems.
For engineers reviewing the MC68HC11E1CFN2 datasheet, MC68HC11E1CFN2 pinout, MC68HC11E1CFN2 application, or MC68HC11E1CFN2 equivalent, this page provides verified functional specifications, package mapping to the 52-pin PLCC (Case 778), confirmed pin roles per Motorola DS rev.5, and validated alternative parts for legacy design continuity and supply chain resilience.
Technical Context
The MC68HC11E1CFN2 implements the M68HC11 CPU core with Harvard architecture, supporting 16-bit addressing and 56 instruction mnemonics. Its memory subsystem includes mask-programmable EPROM (12 KB), user-programmable EEPROM (512 B), and volatile RAM (512 B), all mapped into a unified 64 KB address space with configurable banking via the System Configuration Register.
Peripherals are tightly coupled to the CPU via dedicated control registers: the 8-channel ADC uses a successive-approximation architecture with programmable conversion time (4–27 µs); dual 16-bit timers support input capture (4 channels), output compare (5 channels), pulse accumulation, and real-time interrupt generation; SCI and SPI operate independently with separate baud rate and clock phase controls.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M68HC11 8-bit CISC core with 16-bit address bus and 56-instruction set |
| EPROM Size | 12 KB on-chip EPROM - non-volatile program storage with UV-erasable windowed ceramic package variant |
| EEPROM Size | 512 bytes on-chip EEPROM - byte-erasable, used for configuration/data retention across power cycles |
| RAM Size | 512 bytes on-chip RAM - volatile data storage for stack, variables, and temporary buffers |
| ADC Resolution | 8-bit successive-approximation ADC with 8 input channels and 4–27 µs conversion time |
| Timer Modules | Dual 16-bit timer systems: Timer 1 (4 input capture/5 output compare) and Timer 2 (pulse accumulator + RTI) |
| Serial Interfaces | SCI (asynchronous UART) and SPI (synchronous master/slave) with independent clocking and status registers |
| Bus Speed | Max 2 MHz E-clock - determines instruction execution rate and peripheral timing margins |
Pinout & Package
This device is packaged in a 52-pin Plastic-Leaded Chip Carrier (PLCC), Case 778, with J-lead profile and 0.050" lead pitch. The package is surface-mount compatible and rated for industrial temperature range (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power Supply | +5 V DC main supply for core and I/O; requires local decoupling per datasheet Section 10.5 |
| VSS | Ground Reference | Digital ground return path; separate analog ground not provided - shared reference for ADC and digital logic |
| RESET | Active-Low Reset Input | Asynchronous reset assertion clears CPU registers and initializes memory map to single-chip mode |
| XTAL / EXTAL | Crystal Oscillator Input/Output | Drives internal oscillator circuit; supports 1–4 MHz crystal or external clock source on EXTAL |
| E | System Clock Output | Outputs synchronized E-clock (½ oscillator frequency) for timing external logic and peripherals |
| IRQ | Maskable Interrupt Request | Level-sensitive input triggering highest-priority maskable interrupt vector (0xFFFE–0xFFFF) |
| XIRQ/VPPE | Non-Maskable Interrupt / EPROM Programming Voltage | Active-low NMI input; also supplies VPP during EPROM programming (12.5 V required) |
| PORT A (PA0–PA7) | 8-bit Bidirectional I/O Port | Configurable as general-purpose I/O or special function pins (e.g., AD0–AD7 for ADC inputs) |
| PORT B (PB0–PB7) | 8-bit Bidirectional I/O Port | Supports handshake protocol (STRA/STRB) and timer I/O functions (OC1–OC5, IC1–IC4) |
| PORT C (PC0–PC7) | 8-bit Bidirectional I/O Port | SCI (TXD/RXD), SPI (MISO/MOSI/SCK/SS), and system control signals (MODA/MODB) |
| PORT D (PD0–PD7) | 8-bit Bidirectional I/O Port | Primary expansion bus interface: AS, R/W, BA, BD0–BD7 for external memory/mapping |
| PORT E (PE0–PE7) | 8-bit Bidirectional I/O Port | Includes IRQ, XIRQ, RESET, E, XTAL, EXTAL, and VRL/VRH for ADC reference voltage selection |
Key Features
| Feature | Design Value |
|---|---|
| On-chip EPROM + EEPROM | 12 KB EPROM for firmware and 512 B EEPROM for field-updatable calibration/data without external memory |
| Integrated 8-channel ADC | Hardware-synchronized sampling with programmable conversion time enables deterministic sensor acquisition in motor control loops |
| Dual 16-bit timer subsystem | Input capture (4 channels) and output compare (5 channels) support precise PWM generation and encoder position tracking |
| SCI and SPI coexistence | Independent serial controllers allow simultaneous communication with UART-based diagnostics and SPI-connected sensors/peripherals |
| Single-chip and expanded modes | Configurable memory mapping supports compact standalone operation or external memory expansion up to 64 KB address space |
| COP watchdog and RTI | Computer Operating Properly timer prevents runaway code; Real-Time Interrupt provides accurate periodic servicing at 0.5–128 ms intervals |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Controller |
|---|---|
Use Scenario: Real-time monitoring of throttle position, coolant temperature, and crankshaft position in 4-cylinder gasoline engines. IC Role / Device Role / Timing Role: Central controller executing fuel injection timing, spark advance calculation, and closed-loop idle speed regulation using ADC inputs and timer-based PWM outputs. Use Value: On-chip EPROM stores calibrated lookup tables; 8-bit ADC resolves sensor signals within ±1 LSB; dual timers generate synchronized 10 kHz injector pulses and 500 Hz ignition triggers. |
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: Executes field-oriented control (FOC) algorithms using ADC feedback from current shunts and encoder quadrature signals processed via input capture. Use Value: 16-bit timer input capture measures encoder edge timing with 500 ns resolution; SPI interfaces with isolated gate drivers; EEPROM retains motor tuning parameters across power loss. |
| Legacy Industrial PLC I/O Module | Medical Infusion Pump Controller |
Use Scenario: Modular digital I/O expansion for DIN-rail mounted programmable logic controllers handling discrete sensor inputs and relay outputs. IC Role / Device Role / Timing Role: Manages opto-isolated inputs, drives transistor arrays for 24 V DC outputs, and communicates via RS-232 (SCI) to PLC master CPU. Use Value: PORT D expansion bus connects to external latch-based I/O; COP watchdog ensures fail-safe shutdown on firmware hang; EEPROM stores module identification and calibration offsets. |
Use Scenario: Precision volumetric delivery of IV fluids with flow rate accuracy ≤ ±2% and occlusion detection via pressure transducer. IC Role / Device Role / Timing Role: Reads analog pressure signal via ADC, controls stepper motor via timer-generated step/direction pulses, and logs event history to EEPROM. Use Value: 8-bit ADC digitizes 0–5 V pressure range with 19.6 mV/LSB resolution; output compare generates microstepping waveforms; RTI provides 10 ms control loop timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC11E9CP | Same M68HC11E core, but with 512 B EPROM (not 12 KB) and no on-chip EEPROM; uses 52-pin ceramic windowed PLCC (Case 778B) | Limited program storage and no non-volatile data memory - suitable only for fixed-function designs with external EEPROM or ROM | Select when UV-erasable prototyping is required and firmware size ≤ 512 B; not drop-in compatible due to memory architecture differences |
| MC68HC11F1CFN2 | Pin-compatible 52-pin PLCC variant with 12 KB flash memory instead of EPROM; retains same RAM, EEPROM, ADC, and timer resources | Eliminates need for UV eraser and EPROM programmer; supports in-system reprogramming via bootstrap loader | Preferred for production where field firmware updates are needed; identical pinout and register map enable PCB reuse with flash programming infrastructure |
Compared with MC68HC11E1CFN2, the MC68HC11E9CP offers UV-erasable prototyping but lacks EEPROM and scalable program memory, while the MC68HC11F1CFN2 delivers identical functionality with modern flash technology - enabling faster development cycles and eliminating EPROM programming infrastructure.
Availability
MC68HC11E1CFN2 is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drive controllers, and legacy industrial PLC I/O modules requiring stable component supply and long-term obsolescence management.
Supply support for MC68HC11E1CFN2 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 devices, founded in 2004 as a spin-off from Motorola's semiconductor division.
The M68HC11E family was engineered for cost-sensitive, real-time control applications in automotive, industrial, and appliance markets - emphasizing on-chip integration, low-power operation, and robust peripheral sets for deterministic embedded execution.
FAQ
What is the maximum operating frequency of the MC68HC11E1CFN2?
The MC68HC11E1CFN2 supports a maximum E-clock frequency of 2 MHz, derived from an external crystal or oscillator connected to XTAL/EXTAL pins. This corresponds to a 4 MHz oscillator input (since E-clock = ½ oscillator frequency). Bus timing, instruction execution, and peripheral operation are all synchronized to this E-clock, and all DC and AC electrical characteristics in the datasheet assume operation within this limit.
Does the MC68HC11E1CFN2 include on-chip EEPROM, and how is it accessed?
Yes, the MC68HC11E1CFN2 integrates 512 bytes of on-chip EEPROM mapped at addresses $0100–$02FF. It is accessed via dedicated EEPROM programming control registers (EECR) and supports byte, row, and bulk erase operations. Unlike EPROM, EEPROM can be electrically erased and rewritten in-system without UV exposure, making it suitable for storing calibration data, device IDs, or runtime configuration parameters that must persist across power cycles.
How is EPROM programming performed on the MC68HC11E1CFN2?
EPROM programming for the MC68HC11E1CFN2 requires applying 12.5 V to the XIRQ/VPPE pin while executing specific write sequences to EPROM address locations. This high-voltage programming mode is enabled only when the chip is in bootstrap mode and the NOCOP bit is cleared. Programming must be done with certified hardware (e.g., M68HC11PGMR) and follows strict timing and voltage sequencing defined in Section 2.4 of the datasheet Rev. 5.
What are the key differences between single-chip and expanded modes on the MC68HC11E1CFN2?
In single-chip mode, the MC68HC11E1CFN2 uses its on-chip memory (EPROM, EEPROM, RAM) and I/O ports exclusively - no external bus activity occurs. In expanded mode, the device asserts AS, R/W, and BA signals to drive an external 64 KB address/data bus via PORT D and selected PORT B/C pins, enabling connection to external RAM, ROM, or peripherals. Mode selection is controlled by MODA/MODB pins at reset.
Can the MC68HC11E1CFN2 operate from a 3.3 V supply?
No - the MC68HC11E1CFN2 is specified for 5.0 V ±10% operation only (4.5 V to 5.5 V), as confirmed by DC Electrical Characteristics tables in Section 10.5 of the datasheet. It is not compatible with 3.3 V logic families or supply rails. For 3.3 V operation, designers should consider the MC68HC11L series (e.g., MC68HC11L6), which is explicitly rated for 3.0–5.5 V operation and shares the same instruction set and peripheral register map.
MC68HC11E1CFN2 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:
- 512 x 8
- 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:
MC68HC11E1CFN2 FAQ
1.How can I place an order for MC68HC11E1CFN2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC11E1CFN2 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 MC68HC11E1CFN2 reliable?
The price and inventory of MC68HC11E1CFN2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC11E1CFN2 is usually 5 days.
3.What payment methods are accepted for MC68HC11E1CFN2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68HC11E1CFN2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68HC11E1CFN2?
MC68HC11E1CFN2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC11E1CFN2 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 MC68HC11E1CFN2?
For technical support, including MC68HC11E1CFN2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC11E1CFN2 requirements.
6.How does Aetrix verify that MC68HC11E1CFN2 is sourced from the original manufacturer or authorized distributors?
All MC68HC11E1CFN2 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 MC68HC11E1CFN2 meets industry standards.
7.What is the process for return or replacement of MC68HC11E1CFN2?
All MC68HC11E1CFN2 units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC11E1CFN2, 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 MC68HC11E1CFN2 part is unused and in its original packaging.
Return procedure for MC68HC11E1CFN2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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