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NXP Semiconductors MC68HC711E9CFU2
- Part No.:
- MC68HC711E9CFU2
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 64-BQFP
- Datasheet:
-
MC68HC711E9CFU2.pdf
- Description:
- IC MCU 8BIT 12KB OTP 64QFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,465
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Product details
Overview
MC68HC711E9CFU2 from Freescale Semiconductor is an 8-bit microcontroller in the M68HC11E family featuring 512 bytes of on-chip RAM, 12 KB of EPROM, 256 bytes of EEPROM, and integrated peripherals including a 8-channel 8-bit ADC, SCI, SPI, and a 16-bit timer system. It operates at up to 3 MHz in single-chip mode and supports bootstrap programming via serial interface for embedded control applications in industrial automation and automotive subsystems.
For engineers reviewing the MC68HC711E9CFU2 datasheet, MC68HC711E9CFU2 pinout, MC68HC711E9CFU2 application, or MC68HC711E9CFU2 equivalent, key selection criteria include EPROM programmability, on-chip EEPROM security features, 8-bit ADC resolution with selectable conversion time, SCI/SCI-compatible serial boot capability, and compatibility with HC11 development tools such as EVBU and PCbug11.
Technical Context
The MC68HC711E9CFU2 implements the Motorola 68HC11 CPU core with full instruction set compatibility, supporting single-chip, expanded, and bootstrap operating modes. Its memory map includes fixed 12 KB EPROM (user-programmable), 256-byte EEPROM with block protection, and 512-byte RAM - all mapped into a unified 64 KB address space.
Peripheral integration includes a 16-bit timer with input capture/output compare channels, an 8-channel 8-bit analog-to-digital converter with software-selectable conversion speed (25 µs to 100 µs), dual serial interfaces (SCI and SPI), and five parallel I/O ports (A–E) with configurable direction registers and handshake support on Port D.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Motorola 68HC11 8-bit CISC core with full instruction set compatibility and 64 KB linear address space |
| EPROM Size | 12 KB on-chip EPROM, UV-erasable and electrically programmable in-system via bootstrap mode |
| EEPROM Size | 256 bytes with block protect register and byte/row/bulk erase capability for nonvolatile configuration storage |
| ADC Resolution | 8-bit successive approximation ADC with 8 multiplexed inputs; conversion time configurable from 25 µs to 100 µs |
| Max Clock Frequency | 3 MHz E-clock (6 MHz crystal input with internal divide-by-2); supports both crystal and external clock sources |
| I/O Ports | Five bidirectional ports (A–E): Port A (8-bit, analog-capable), Port B (8-bit), Port C (8-bit), Port D (8-bit with handshaking), Port E (8-bit) |
| Serial Interfaces | One asynchronous SCI (full-duplex, programmable baud rate) and one synchronous SPI (master/slave, 4-wire interface) |
Pinout & Package
MC68HC711E9CFU2 is housed in a 68-pin ceramic flatpack (CFU) package with 0.025-inch lead pitch, designed for high-reliability industrial and automotive environments requiring hermetic sealing and extended temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Single 5 V ±10% supply; decoupling required per datasheet layout guidelines for noise immunity |
| XTAL / EXTAL | Clock input pair | Drives on-chip oscillator; supports crystal (1–4 MHz) or external TTL clock source |
| E | System clock output | Provides buffered E-clock (½ crystal frequency) for synchronization of external logic or peripherals |
| RESET | Active-low reset input | Asynchronous hardware reset; initiates memory initialization and vector fetch from $FFFE–FFFF |
| XIRQ/VPPE | Non-maskable interrupt / EPROM programming voltage | Dual-function pin: NMI source during normal operation; supplies +12 V programming voltage during EPROM write cycles |
| PORT A[7:0] | Analog/digital I/O | 8-bit port with analog input capability on PA0–PA7; used for ADC channel selection and general-purpose I/O |
| PORT D[7:0] | Handshake-capable parallel I/O | Supports strobed data transfer using STRA/AS and STRB/RW signals; enables synchronous communication with external peripherals |
Key Features
| Feature | Design Value |
|---|---|
| On-chip EPROM programming | Enables field firmware updates via serial bootstrap without external programmers; requires +12 V on XIRQ/VPPE pin |
| EEPROM security lock | Configurable block protection prevents unauthorized read/write access to EEPROM and CONFIG registers |
| SCI-based bootstrap mode | Allows full memory programming (EPROM/EEPROM) and debugging using only RS-232-level serial connection and PCbug11 host software |
| Hardware timer subsystem | 16-bit free-running counter with four input capture and five output compare channels for precise event timing and PWM generation |
| Single-chip mode operation | Eliminates need for external memory or bus logic; simplifies PCB design and reduces BOM cost for cost-sensitive embedded systems |
Applications
| Industrial Motor Control | Automotive Body Controller |
|---|---|
Use Scenario: Closed-loop speed regulation of DC brush motors in conveyor systems using feedback from optical encoders. IC Role / Device Role / Timing Role: Central controller executing PID algorithm, reading encoder pulses via input capture, driving H-bridge via Port D strobes, and managing ADC-based current sensing. Use Value: Integrated 16-bit timer with input capture eliminates external counter IC; on-chip EPROM enables firmware updates in deployed units without hardware modification. | Use Scenario: Centralized control of door locks, window lifts, and interior lighting in entry-level vehicles with CAN gateway coordination. IC Role / Device Role / Timing Role: Local node processor handling switch debouncing, PWM dimming, and serial diagnostics via SCI; communicates status over low-speed UART to main ECU. Use Value: 256-byte EEPROM stores user preferences and fault logs; security lock prevents tampering with calibration or configuration data. |
| Medical Infusion Pump | Legacy Industrial PLC I/O Module |
Use Scenario: Precision fluid delivery control requiring real-time pressure monitoring, stepper motor sequencing, and safety interlock validation. IC Role / Device Role / Timing Role: Safety-critical controller sampling pressure sensor via 8-channel ADC, generating step pulses using output compare, and validating emergency stop inputs on Port E. Use Value: Bootstrap programming allows regulatory-compliant firmware patches in field-deployed devices; single-chip mode ensures deterministic timing for safety-critical loops. | Use Scenario: Retrofit I/O expansion for aging PLC systems needing isolated digital input/output and analog signal conditioning. IC Role / Device Role / Timing Role: Standalone module translating Modbus RTU commands (via SCI) into parallel port writes and ADC reads, interfacing with legacy 24 VDC field devices. Use Value: Port D handshake protocol synchronizes data transfers with external isolation logic; on-chip EPROM stores Modbus register mapping and scaling coefficients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC11A8CP | Same CPU core but 8 KB ROM (mask-programmed), no EPROM; lacks EEPROM and VPPE pin | Suitable for high-volume, fixed-function designs where field updates are unnecessary | Select when firmware is finalized and cost-per-unit optimization outweighs field upgrade flexibility |
| MC68HC11E20CFU2 | Pin-compatible variant with 20 KB EPROM, same EEPROM size and peripheral set; identical CFU68 package | Preferred for applications requiring larger program storage without changing PCB layout | Choose for upward-compatible firmware scalability while retaining existing hardware design and toolchain |
Compared with MC68HC11A8CP, the MC68HC711E9CFU2 provides field-programmable EPROM and EEPROM-based configuration storage - critical for prototyping and maintenance. Against MC68HC11E20CFU2, it trades program memory capacity for lower cost and smaller die size, making it optimal for resource-constrained implementations where 12 KB suffices.
Availability
MC68HC711E9CFU2 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, medical infusion pumps, and legacy PLC I/O modules requiring stable component supply and long-term lifecycle support.
Supply support for MC68HC711E9CFU2 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, analog, and mixed-signal ICs for automotive, industrial, and networking markets.
The M68HC11E family was engineered for cost-sensitive, real-time control applications demanding high integration, field-upgradable firmware, and robust operation across extended temperature ranges.
FAQ
What programming voltage is required for EPROM writes on the MC68HC711E9CFU2?
The MC68HC711E9CFU2 requires +12 V applied to the XIRQ/VPPE pin during EPROM programming cycles. This voltage is internally regulated and used solely for EPROM cell injection; standard 5 V operation resumes immediately after programming completes. The MC68HC711E9CFU2 datasheet specifies strict timing and voltage tolerance requirements to ensure reliable write/erase endurance over 100 cycles.
Does the MC68HC711E9CFU2 support in-circuit debugging?
Yes, the MC68HC711E9CFU2 supports in-circuit debugging via its built-in bootstrap monitor, accessible through the SCI interface using tools like PCbug11. This allows full memory inspection, register read/write, and breakpoint insertion without requiring external JTAG or BDM hardware. The MC68HC711E9CFU2 must be configured in bootstrap mode at power-on by asserting MODA and MODB appropriately.
How does the ADC performance of the MC68HC711E9CFU2 compare to later HC11 variants?
The MC68HC711E9CFU2 features an 8-bit ADC with 8 input channels and conversion times ranging from 25 µs to 100 µs depending on selected prescaler. Unlike later variants such as the MC68HC11F1, it lacks differential input mode and hardware averaging. Its ADC accuracy is specified at ±2 LSB INL/DNL over temperature, sufficient for basic sensor interfacing but not precision measurement applications.
Can the MC68HC711E9CFU2 operate from a 3.3 V supply?
No, the MC68HC711E9CFU2 is rated for 4.5 V to 5.5 V operation only. It is not compatible with 3.3 V logic families or supply rails. For 3.3 V systems, designers should consider the MC68LC711E9 variant (low-voltage version), which shares the same pinout and instruction set but requires different power sequencing and has reduced AC timing parameters.
What is the purpose of the STRA/AS and STRB/R/W pins on the MC68HC711E9CFU2?
The STRA/AS and STRB/R/W pins on the MC68HC711E9CFU2 implement a hardware handshake protocol for Port D, enabling synchronous parallel data transfers with external peripherals such as LCD controllers or isolated I/O expanders. STRA/AS acts as address strobe or chip select, while STRB/R-W controls data direction (read/write), allowing the MC68HC711E9CFU2 to coordinate timing without software polling overhead.
MC68HC711E9CFU2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 64-BQFP
- 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:
- 38
- Program Memory Size:
- 12KB (12K x 8)
- Program Memory Type:
- OTP
- 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:
MC68HC711E9CFU2 FAQ
1.How can I place an order for MC68HC711E9CFU2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC711E9CFU2 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 MC68HC711E9CFU2 reliable?
The price and inventory of MC68HC711E9CFU2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC711E9CFU2 is usually 5 days.
3.What payment methods are accepted for MC68HC711E9CFU2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68HC711E9CFU2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68HC711E9CFU2?
MC68HC711E9CFU2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC711E9CFU2 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 MC68HC711E9CFU2?
For technical support, including MC68HC711E9CFU2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC711E9CFU2 requirements.
6.How does Aetrix verify that MC68HC711E9CFU2 is sourced from the original manufacturer or authorized distributors?
All MC68HC711E9CFU2 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 MC68HC711E9CFU2 meets industry standards.
7.What is the process for return or replacement of MC68HC711E9CFU2?
All MC68HC711E9CFU2 units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC711E9CFU2, 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 MC68HC711E9CFU2 part is unused and in its original packaging.
Return procedure for MC68HC711E9CFU2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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