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NXP Semiconductors MC68HC11E1CFN2R2
- Part No.:
- MC68HC11E1CFN2R2
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
MC68HC11E1CFN2R2.pdf
- Description:
- IC MCU 8BIT ROMLESS 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,262
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Product details
Overview
MC68HC11E1CFN2R2 from Freescale Semiconductor is an 8-bit microcontroller in the M68HC11E family, featuring 512 bytes of on-chip RAM, 2 KB of EPROM, 256 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 sensors and industrial motor controllers.
For engineers reviewing the MC68HC11E1CFN2R2 datasheet, MC68HC11E1CFN2R2 pinout, MC68HC11E1CFN2R2 application, or MC68HC11E1CFN2R2 equivalent, key selection criteria include EPROM programmability, on-chip EEPROM retention (100 years), COP watchdog reliability, and compatibility with legacy HC11 development tools like EVBU and PCbug11.
Technical Context
The MC68HC11E1CFN2R2 implements the Motorola 68HC11 CPU core with full instruction set compatibility to the 6805, supporting inherent, immediate, direct, extended, indexed, and relative addressing modes. Its memory map includes fixed ROM/EPROM at $E000–$FFFF, configurable RAM/I/O space, and dedicated register pages for peripheral control.
Peripheral subsystems are tightly coupled to the CPU via dedicated control/status registers: the A/D converter uses a 4-bit multiplexer with software-triggered conversions; the SCI supports asynchronous full-duplex communication with idle-line and address-mark wakeup; and the SPI operates in master/slave mode with programmable clock polarity and phase.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 8-bit M68HC11 with 6805 instruction set compatibility and 16-bit index registers - enables legacy code porting and deterministic real-time execution. |
| Memory | 2 KB on-chip EPROM (user-programmable), 512 B RAM, 256 B EEPROM - supports field-upgradable firmware without external memory. |
| ADC | 8-channel 8-bit successive-approximation ADC with 25 µs conversion time - suitable for sensor signal acquisition in closed-loop motor control. |
| Timers | Two 16-bit timer modules: one with 4 input-capture/1 output-compare channels, another with 3 output-compare channels - enables precise PWM generation and pulse-width measurement. |
| Serial Interfaces | SCI (asynchronous UART) + SPI (synchronous master/slave) - provides dual-protocol connectivity for diagnostics and peripheral expansion. |
| Supply Voltage | 5.0 V ±10% (standard voltage range) - compatible with legacy 5 V industrial logic families and simplifies power design. |
| Operating Temperature | –40°C to +85°C - qualified for under-hood automotive and factory-floor industrial environments. |
Pinout & Package
MC68HC11E1CFN2R2 is housed in a 52-pin Plastic-Leaded Chip Carrier (PLCC) package (Case 778), with 40 general-purpose I/O pins distributed across Ports A–E, plus dedicated control, clock, reset, and power terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Primary 5 V DC power domain; decoupling required within 1 cm for stable operation at 2 MHz bus speed. |
| RESET | Active-low reset input | Asynchronous hardware reset; initiates cold start sequence including COP disable and memory initialization. |
| XTAL / EXTAL | Crystal oscillator input/output | Supports 1–4 MHz crystal or external clock source; determines E-clock frequency (½ crystal frequency). |
| E | System clock output | Provides buffered 2 MHz E-clock for synchronous peripheral timing and external device synchronization. |
| IRQ / XIRQ | Maskable and non-maskable interrupt inputs | IRQ supports priority-based vectored interrupts; XIRQ provides highest-priority NMI for critical fault handling. |
| PORT A (PA0–PA7) | 8-bit bidirectional I/O port | Configurable as general-purpose I/O or dedicated A/D channel inputs (PA0–PA7 map to AD0–AD7). |
| PORT C (PC0–PC7) | 8-bit bidirectional I/O port | Includes SCI transmit/receive pins (PC0/PC1) and SPI signals (PC2–PC5) - enables shared pin functionality. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip EPROM programming | Field-programmable via bootstrap mode using standard 5 V VPP - eliminates need for external EPROM programmer. |
| EEPROM data retention | Guaranteed 100-year data retention at +85°C - ensures long-term calibration storage in unattended systems. |
| COP watchdog timer | Programmable timeout (0.4 ms to 1.0 s) with independent clock source - prevents runaway code in safety-critical applications. |
| Single-chip mode operation | Full functionality with no external memory or glue logic - reduces BOM count and PCB area in cost-sensitive designs. |
| Security lock feature | EEPROM-configurable memory protection - prevents unauthorized readout of firmware during debugging or field service. |
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 OBD-II diagnostics via SCI. Use Value: Integrated ADC and timer capture/compare enable sub-microsecond event synchronization without external timing ICs. |
Use Scenario: Closed-loop speed regulation of 3-phase AC induction motors using hall-effect feedback and PWM output. IC Role / Device Role / Timing Role: Main motion controller generating 16 kHz PWM gate drive signals and sampling current feedback at 10 kHz. Use Value: Dual 16-bit timers with output compare allow simultaneous PWM generation and precise current-sampling window control. |
| Medical Infusion Pump | Building Automation Sensor Node |
Use Scenario: Dose accuracy verification and alarm management in hospital-grade IV pumps with flow and pressure sensing. IC Role / Device Role / Timing Role: Safety-critical controller managing stepper motor sequencing, pressure transducer ADC reads, and audible/visual alerts. Use Value: COP watchdog and EEPROM-stored calibration coefficients ensure compliance with IEC 62304 Class B software requirements. |
Use Scenario: Wireless HVAC node collecting temperature, humidity, and occupancy data for centralized building management. IC Role / Device Role / Timing Role: Edge intelligence unit performing local sensor fusion and SPI-based RF module control before data transmission. Use Value: Low-power wait/stop modes reduce average current to <100 µA during sensor polling intervals, extending battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC11A8CP | 8 KB ROM (mask-programmed), no EPROM or EEPROM; identical pinout and peripheral set. | Fixed firmware only - unsuitable for field updates or prototyping requiring reprogrammability. | Select when production volume justifies mask ROM NRE costs and firmware is fully validated. |
| MC912B32CPVE | Enhanced 16-bit HCS12 core, 32 KB Flash, CAN interface, higher clock speed (25 MHz). | Requires PCB redesign (80-pin LQFP); adds CAN bus support but increases complexity and cost. | Select for new designs needing CAN connectivity or >2x performance headroom; not drop-in compatible. |
Compared with MC68HC11A8CP and MC912B32CPVE, the MC68HC11E1CFN2R2 uniquely balances field-programmable EPROM, on-chip EEPROM for calibration storage, and proven 5 V industrial robustness - making it optimal for legacy system maintenance and low-volume embedded upgrades where toolchain continuity matters.
Availability
MC68HC11E1CFN2R2 is available at Aetrix Electronics and suitable for automotive engine control, industrial motor drives, medical infusion pumps, and building automation sensor nodes requiring stable component supply across extended product lifecycles.
Supply support for MC68HC11E1CFN2R2 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 MC68HC11E1CFN2R2 belongs to the M68HC11E microcontroller family, designed specifically for cost-sensitive, real-time control applications requiring high reliability, on-chip nonvolatile memory, and backward compatibility with legacy 6805/68HC11 toolchains.
FAQ
What is the maximum bus frequency supported by the MC68HC11E1CFN2R2?
The MC68HC11E1CFN2R2 supports a maximum E-clock frequency of 2 MHz, derived from a 4 MHz crystal or external clock source (E-clock = ½ oscillator frequency). This defines the instruction execution rate and peripheral timing boundaries; exceeding this limit risks undefined behavior and violates the device's AC specifications per Section 10.9 of the datasheet.
Does the MC68HC11E1CFN2R2 support in-system programming of its EPROM?
Yes, the MC68HC11E1CFN2R2 supports in-system EPROM programming via bootstrap mode using only VDD and VPP (12 V) applied to designated pins - no external programmer is required. Programming is performed through the SCI interface using host commands defined in AN1060, and requires the device to be in single-chip mode with proper timing per Section 2.4.1.
How is EEPROM protected against accidental overwrite in the MC68HC11E1CFN2R2?
The MC68HC11E1CFN2R2 uses a dedicated EEPROM programming control register (EECR) with write-enable bits and a 3-byte security sequence. Writes require both correct timing (minimum 10 µs between setup and strobe) and the exact byte sequence 0x55 → 0xAA → 0xF0 - preventing spurious writes from noise or software errors per Section 2.5.1.2.
Can the MC68HC11E1CFN2R2 operate in low-power modes, and how deep is stop mode current draw?
Yes, the MC68HC11E1CFN2R2 supports Wait and Stop modes. In Stop mode (enabled via STOP instruction), current consumption drops to ≤10 µA at 5 V and 25°C per Section 5.6.2 - ideal for battery-powered applications requiring periodic wake-up via IRQ or XIRQ. Real-time interrupt (RTI) is disabled in Stop mode but resumes upon wake-up.
What development tools are officially supported for the MC68HC11E1CFN2R2?
Officially supported tools include the MC68HC11EVBU evaluation board, SPGMR11 serial programmer, and PCbug11 debugger software. These enable full bootstrap programming, real-time register inspection, and COP watchdog testing per Appendix A and EB296 application notes - ensuring compatibility with the MC68HC11E1CFN2R2's specific memory map and security features.
MC68HC11E1CFN2R2 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:
- 3MHz
- 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:
MC68HC11E1CFN2R2 FAQ
1.How can I place an order for MC68HC11E1CFN2R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC11E1CFN2R2 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 MC68HC11E1CFN2R2 reliable?
The price and inventory of MC68HC11E1CFN2R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC11E1CFN2R2 is usually 5 days.
3.What payment methods are accepted for MC68HC11E1CFN2R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68HC11E1CFN2R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68HC11E1CFN2R2?
MC68HC11E1CFN2R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC11E1CFN2R2 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 MC68HC11E1CFN2R2?
For technical support, including MC68HC11E1CFN2R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC11E1CFN2R2 requirements.
6.How does Aetrix verify that MC68HC11E1CFN2R2 is sourced from the original manufacturer or authorized distributors?
All MC68HC11E1CFN2R2 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 MC68HC11E1CFN2R2 meets industry standards.
7.What is the process for return or replacement of MC68HC11E1CFN2R2?
All MC68HC11E1CFN2R2 units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC11E1CFN2R2, 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 MC68HC11E1CFN2R2 part is unused and in its original packaging.
Return procedure for MC68HC11E1CFN2R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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