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NXP Semiconductors MC68HC11D0CFBE2
- Part No.:
- MC68HC11D0CFBE2
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-QFP
- Datasheet:
-
MC68HC11D0CFBE2.pdf
- Description:
- IC MCU 8BIT ROMLESS 44QFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,892
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Product details
Overview
MC68HC11D0CFBE2 from NXP (formerly Freescale) is a ROM-based 8-bit microcontroller unit (MCU) built on the MC68HC11E9 architecture, featuring 4 KB on-chip ROM, 192 bytes of static RAM, a 16-bit programmable timer with input capture/output compare, SCI and SPI serial interfaces, and real-time interrupt capability. It operates at up to 3 MHz bus speed in single-chip mode and supports automotive and industrial control applications requiring deterministic timing and low-power operation.
For engineers reviewing the MC68HC11D0CFBE2 datasheet, MC68HC11D0CFBE2 pinout, MC68HC11D0CFBE2 application, or MC68HC11D0CFBE2 equivalent, key selection criteria include its OTPROM-free ROM configuration, 40-pin DIP package, −40°C to +85°C industrial temperature range, and compatibility with legacy HC11 development toolchains and memory-mapped I/O peripherals.
Technical Context
The MC68HC11D0CFBE2 implements a fully static CPU core derived from the Motorola 6800 instruction set, supporting single-chip, expanded multiplexed, and bootstrap operating modes. Its memory map includes 64 KB address space, with ROM mapped to $E000–$EFFF and RAM at $0080–$00FF, plus dedicated I/O register space.
Peripheral subsystems include an 8-bit pulse accumulator, COP watchdog timer, RTI circuit, and dual serial interfaces: asynchronous NRZ SCI (with idle-line and address-mark wakeup) and synchronous SPI (master/slave, four transfer formats). All peripherals are memory-mapped and controlled via dedicated registers accessible in user or special modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit CISC CPU compatible with Motorola 6800; fully static design enabling DC to 3 MHz operation |
| On-Chip Memory | 4 KB ROM (not reprogrammable); 192 bytes static RAM retained in wait/stop modes |
| Bus Speed | 3 MHz maximum E-clock frequency; supports single-chip and expanded multiplexed bus modes |
| Operating Temperature | −40°C to +85°C industrial grade; validated per Freescale specification for MC68HC11D0 family |
| I/O Ports | Four 8-bit bidirectional ports (PA–PD); Port A supports timer I/O functions (IC1–IC3, OC1–OC4) |
| Serial Interfaces | SCI (asynchronous, full-duplex, NRZ); SPI (synchronous, master/slave, 4 clock phase/polarity combinations) |
| Timer System | 16-bit programmable timer with 4-stage prescaler, 4 input capture channels, 5 output compare channels, and pulse accumulator |
Pinout & Package
MC68HC11D0CFBE2 is housed in a 40-pin plastic dual in-line package (DIP), case 711-03, with 0.6-inch body width and 0.1-inch lead pitch. Pin assignments follow standard HC11 DIP layout with multiplexed address/data bus on Port D and dedicated control signals including RESET, IRQ, XIRQ/VPP, XTAL, EXTAL, and E-clock output.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PA0–PA7 | Port A data lines | General-purpose I/O; PA0–PA3 also serve as timer input capture (IC1–IC3) and output compare (OC1–OC4) pins |
| PB0–PB7 | Port B data lines | 8-bit general-purpose bidirectional I/O port with no alternate functions |
| PC0–PC7 | Port C data lines | 8-bit general-purpose bidirectional I/O port; PC0–PC1 support SPI signals (MISO/MOSI) |
| PD0–PD7 | Port D data/address lines | Multiplexed AD0–AD7 in expanded mode; PD6/AS serves as address strobe; PD7/R/W controls read/write direction |
| RESET | Active-low reset input | Asynchronous reset signal; initiates hardware reset sequence and clears CPU registers and peripheral control logic |
| IRQ | Interrupt request input | Maskable level-sensitive interrupt input; triggers vector fetch from $FFFE–$FFFF upon assertion |
| XIRQ/VPP | Non-maskable interrupt / programming voltage | Edge-triggered NMI input; VPP function not applicable to ROM-based MC68HC11D0CFBE2 |
| XTAL / EXTAL | Crystal oscillator inputs | XTAL connects to crystal or external clock source; EXTAL provides feedback path for internal oscillator amplifier |
| E | System clock output | Output-only E-clock signal derived from internal oscillator; used for synchronization of external logic and timing-critical peripherals |
Key Features
| Feature | Design Value |
|---|---|
| ROM-based execution | 4 KB factory-programmed ROM eliminates need for external program memory and bootloading infrastructure |
| Low-power operation | Stop and wait modes reduce current consumption to µA-level while preserving RAM and register contents |
| Memory-mapped I/O | All peripherals accessed via fixed addresses in $1000–$103F range, enabling uniform register access without special instructions |
| Deterministic timer subsystem | 16-bit counter with independent input capture latching and output compare forcing enables precise event timing and waveform generation |
| Legacy toolchain support | Fully compatible with Motorola/Freescale HC11 assembler, debugger, and PROM programmer tools (e.g., BUFFALO monitor) |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Controller |
|---|---|
Use Scenario: Real-time monitoring of crankshaft position, throttle angle, and coolant temperature in 4-cylinder gasoline engine management systems. IC Role / Device Role / Timing Role: Primary MCU executing fuel injection and spark timing algorithms with sub-millisecond interrupt latency using RTI and input capture channels. Use Value: Deterministic 3 MHz bus timing and hardware timer capture ensure ±1° crankshaft angle resolution at 6000 RPM without software overhead. | Use Scenario: Closed-loop speed and torque control of 3-phase AC induction motors in HVAC blowers and conveyor drives. IC Role / Device Role / Timing Role: Central controller interfacing with analog sensor inputs, generating PWM gate signals via output compare, and communicating via SCI to HMI panels. Use Value: Integrated 16-bit timer with 5 output compare channels enables simultaneous generation of three-phase complementary PWM with dead-time insertion. |
| Medical Infusion Pump | Legacy Industrial PLC I/O Module |
Use Scenario: Precise volumetric delivery control in battery-powered infusion pumps requiring fail-safe operation and long-term reliability. IC Role / Device Role / Timing Role: Safety-critical controller managing stepper motor sequencing, pressure sensing, and alarm signaling using COP watchdog and real-time interrupts. Use Value: On-chip COP watchdog with configurable timeout and stop-mode retention of RAM ensures continuous operation during power brownouts without data loss. | Use Scenario: Discrete I/O expansion module for Modbus RTU-based PLC systems handling 16 digital inputs and 8 relay outputs. IC Role / Device Role / Timing Role: Protocol translator and I/O scheduler using SCI for Modbus communication and Port B/C/D for bit-banged GPIO control. Use Value: Memory-mapped peripheral registers and 64 KB address space simplify firmware development for field-upgradeable I/O mapping tables stored in external EEPROM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC11D3CFBE2 | 4 KB OTPROM instead of ROM; requires programming step post-manufacture; identical pinout and instruction set | Used where field firmware updates are required; not suitable for high-volume cost-sensitive production without programming infrastructure | Select MC68HC11D3CFBE2 only if programmability justifies added test and programming cost |
| MC68HC11E9CP | 64 KB ROM, 512 bytes RAM, enhanced timer with 8-channel input capture; 52-pin PLCC package | Targeted at higher-complexity control tasks requiring larger code space and more I/O; incompatible pinout and PCB footprint | Choose MC68HC11E9CP when application exceeds 4 KB code size or needs additional timer resources |
Compared with MC68HC11D3CFBE2, the MC68HC11D0CFBE2 offers lower total cost of ownership in high-volume production due to elimination of programming steps, while MC68HC11E9CP provides scalability for feature-rich applications but mandates PCB redesign and toolchain validation.
Availability
MC68HC11D0CFBE2 is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drive controllers, medical infusion pumps, and legacy PLC I/O modules requiring stable component supply across extended product lifecycles.
Supply support for MC68HC11D0CFBE2 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 Philips' semiconductor division, specializing in secure connectivity solutions and microcontrollers for automotive, industrial, and IoT markets.
The MC68HC11D0CFBE2 belongs to the legacy HC11 microcontroller family, designed for deterministic real-time control in resource-constrained embedded systems where ROM-based reliability and toolchain maturity outweigh the need for flash reprogrammability.
FAQ
What is the memory configuration of the MC68HC11D0CFBE2?
The MC68HC11D0CFBE2 contains 4 KB of factory-programmed ROM mapped to addresses $E000–$EFFF and 192 bytes of static RAM located at $0080–$00FF. Unlike OTPROM variants, this ROM cannot be reprogrammed in-system or in-circuit. The memory map also includes 32 bytes of I/O register space ($1000–$101F) and supports up to 64 KB of external address space in expanded mode. All RAM contents are preserved during wait and stop low-power modes.
Does the MC68HC11D0CFBE2 support in-circuit debugging?
The MC68HC11D0CFBE2 does not support in-circuit debugging via JTAG or BDM interfaces. It relies on the onboard BUFFALO (Bit User Fast Friendly Aid to Logical Operation) monitor, which requires a UART connection and external host terminal for basic memory inspection, register dumps, and breakpoint execution. Debugging is limited to run-control and memory access - no real-time trace or hardware breakpoints are available. Firmware must be verified pre-deployment using cycle-accurate simulators or ICE hardware.
What are the power supply requirements for the MC68HC11D0CFBE2?
The MC68HC11D0CFBE2 operates from a single 5.0 V ±10% supply (VDD = 4.5 V to 5.5 V) referenced to VSS (ground). It draws 20 mA typical at 3 MHz E-clock with all peripherals active, dropping to <50 µA in stop mode. No separate analog or I/O supply rails are required. The device meets Freescale's industrial temperature specification (−40°C to +85°C) under these conditions, and no external voltage regulators or decoupling beyond standard 0.1 µF ceramic capacitors per VDD pin are mandated.
Can the MC68HC11D0CFBE2 be used as a drop-in replacement for the MC68HC11D3CFBE2?
No, the MC68HC11D0CFBE2 is not a drop-in replacement for the MC68HC11D3CFBE2. Although both share identical pinout, package, and instruction set, the MC68HC11D3CFBE2 contains 4 KB of one-time programmable ROM (OTPROM) that requires programming before use, whereas the MC68HC11D0CFBE2 contains factory-programmed ROM with fixed firmware. Swapping them without verifying firmware compatibility and reprogramming infrastructure will result in non-functional behavior. Hardware layout is compatible, but firmware and production flow differ fundamentally.
What serial communication protocols does the MC68HC11D0CFBE2 support?
The MC68HC11D0CFBE2 supports two hardware serial protocols: an asynchronous Serial Communications Interface (SCI) compliant with RS-232 electrical levels (when paired with external transceivers) and a synchronous Serial Peripheral Interface (SPI) supporting master and slave modes. The SCI features NRZ encoding, programmable baud rate, idle-line and address-mark wakeup, and error detection (parity, framing, overrun). The SPI supports four clock polarity/phase combinations and uses PC0 (MISO), PC1 (MOSI), PC2 (SCK), and PC3 (SS) pins.
MC68HC11D0CFBE2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-QFP
- Series:
- HC11
- Packaging:
- Tray
- 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:
- 26
- Program Memory Size:
- -
- Program Memory Type:
- ROMless
- EEPROM Size:
- -
- RAM Size:
- 192 x 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC68HC11D0CFBE2 FAQ
1.How can I place an order for MC68HC11D0CFBE2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC11D0CFBE2 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 MC68HC11D0CFBE2 reliable?
The price and inventory of MC68HC11D0CFBE2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC11D0CFBE2 is usually 5 days.
3.What payment methods are accepted for MC68HC11D0CFBE2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68HC11D0CFBE2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68HC11D0CFBE2?
MC68HC11D0CFBE2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC11D0CFBE2 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 MC68HC11D0CFBE2?
For technical support, including MC68HC11D0CFBE2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC11D0CFBE2 requirements.
6.How does Aetrix verify that MC68HC11D0CFBE2 is sourced from the original manufacturer or authorized distributors?
All MC68HC11D0CFBE2 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 MC68HC11D0CFBE2 meets industry standards.
7.What is the process for return or replacement of MC68HC11D0CFBE2?
All MC68HC11D0CFBE2 units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC11D0CFBE2, 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 MC68HC11D0CFBE2 part is unused and in its original packaging.
Return procedure for MC68HC11D0CFBE2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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