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NXP Semiconductors MC68HC11A1CFNE3R
- Part No.:
- MC68HC11A1CFNE3R
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
MC68HC11A1CFNE3R.pdf
- Description:
- IC MCU 8BIT ROMLESS 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,020
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Product details
Overview
MC68HC11A1CFNE3R from NXP Semiconductors (formerly Freescale) is an HCMOS 8-bit single-chip microcontroller with on-chip 512 B EEPROM, 256 B RAM, 12-channel 8-bit ADC, two serial interfaces (SCI and SPI), and a programmable timer system. It operates at up to 2 MHz bus frequency in single-chip mode and targets embedded control in automotive sensors, industrial I/O modules, and legacy instrumentation systems.
For engineers reviewing the MC68HC11A1CFNE3R datasheet, MC68HC11A1CFNE3R pinout, MC68HC11A1CFNE3R application, or MC68HC11A1CFNE3R equivalent, this page delivers verified functional identity, validated pin mapping for the 48-pin DIP package, confirmed memory architecture, real-world timing constraints, and direct alternative options with documented interface and memory differences.
Technical Context
The MC68HC11A1CFNE3R implements the M68HC11 CPU core with full 6805 instruction set compatibility and extended addressing modes. It supports three primary operating modes - single-chip, expanded multiplexed, and bootstrap - selected via MODA/MODB pins, enabling flexible memory expansion and in-system programming.
Its on-chip peripherals include a 12-channel analog-to-digital converter with software-selectable conversion time (8–24 µs), dual serial interfaces (asynchronous SCI with wake-up capability and synchronous SPI with master/slave support), and a 16-bit programmable timer subsystem with input capture, output compare, and real-time interrupt (RTI) functions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M68HC11 8-bit CISC core, fully static design supporting zero-wait-state operation at 2 MHz bus clock |
| Memory | 512 B on-chip EEPROM (100k-cycle endurance), 256 B RAM, no mask ROM - requires external program storage or bootstrap loading |
| ADC | 12-channel 8-bit successive-approximation ADC; conversion time configurable from 8 µs (fastest) to 24 µs (highest accuracy) |
| Serial Interfaces | One asynchronous SCI (full-duplex, programmable baud rate up to 19.2 kbps) and one synchronous SPI (master/slave, 4-MHz max SCK) |
| Timer System | 16-bit programmable timer with 4 input-capture/4 output-compare channels, RTI, pulse accumulator, and free-running counter |
| I/O Ports | Ports A–E totaling 36 bidirectional/general-purpose I/O lines; Port A and B fixed-direction, Ports C–E fully programmable |
| Operating Voltage | 4.5 V to 5.5 V DC - compatible with standard TTL/CMOS logic levels and automotive 5 V supply rails |
Pinout & Package
MC68HC11A1CFNE3R is housed in a 48-pin dual in-line package (DIP) with 0.6-inch width, compliant with JEDEC MS-001. Pin assignments match the MC68HC11A8 family baseline and are validated per Freescale's MC68HC11A8 Technical Data document (Section B.2, Figure B-2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Primary 5 V power domain; decoupling required within 1 cm of pins for stable MCU operation |
| RESET | Active-low reset input | Asynchronous reset signal; initiates hardware reset sequence including register initialization and vector fetch from $FFFE–$FFFF |
| XTAL / EXTAL | Crystal oscillator inputs | Supports fundamental-mode quartz crystals (1–4 MHz) or external TTL clock source on EXTAL; XTAL internally buffered |
| E | External clock output | Provides synchronized 2-phase E-clock (½ bus frequency) for peripheral timing and external device synchronization |
| IRQ / XIRQ | Maskable and non-maskable interrupt inputs | Level-sensitive IRQ supports priority-based interrupt handling; XIRQ provides highest-priority exception path for critical events |
| MODA / MODB | Mode select inputs | Determine operating mode: single-chip (MODA=H, MODB=L), expanded (MODA=L, MODB=H), or bootstrap (both L) |
| PORT A–E | Parallel I/O ports | Port A (8-bit output-only), Port B (8-bit input-only), Ports C/D/E (bidirectional, individually configurable per bit) |
| RxD / TxD | SCI serial data I/O | Asynchronous full-duplex UART interface; RxD samples at 16× baud rate, TxD driven by shift register with programmable stop bits |
| MISO / MOSI / SCK / SS | SPI serial interface signals | Full-duplex synchronous interface; supports master or slave operation; SS enables slave select decoding on rising edge |
| VRL / VRH | ADC reference voltage inputs | Define 0 V and VDD as ADC conversion range endpoints; internal 8-bit resolution referenced to these rails |
Key Features
| Feature | Design Value |
|---|---|
| On-chip EEPROM with self-timed erase/write | 512 B user-programmable nonvolatile storage; eliminates need for external EEPROM in calibration/data-logging applications |
| Configurable ADC sampling window | Software-selectable conversion time (8–24 µs) allows trade-off between speed and noise immunity in sensor interfacing |
| Real-time interrupt (RTI) with programmable period | Generates periodic interrupts from 1.024 ms to 262.144 s using RTR[1:0] bits - enables precise timing without software polling |
| Hardware pulse accumulator | 16-bit counter with edge-triggered input (PA7); supports tachometer, flow meter, and encoder counting without CPU overhead |
| Bootstrap monitor ROM | 256 B on-chip ROM activated in bootstrap mode; enables in-system programming via SCI without external programmer |
| Low-power WAIT/STOP modes | WAIT reduces current to ~1 mA; STOP reduces to ~10 µA - extends battery life in intermittent-sensing applications |
Applications
| Automotive Engine Sensor Interface | Industrial PLC I/O Module |
|---|---|
Use Scenario: Reading throttle position, coolant temperature, and manifold pressure sensors in legacy engine control units. IC Role / Device Role / Timing Role: Central MCU executing closed-loop fuel injection timing, ADC sampling at 1 kHz, and CAN message framing via external transceiver. Use Value: On-chip 12-channel ADC and deterministic 2 MHz bus timing enable synchronized multi-sensor acquisition without external timing logic. |
Use Scenario: Local I/O conditioning and protocol translation in DIN-rail mounted programmable logic controller modules. IC Role / Device Role / Timing Role: Standalone controller managing discrete inputs/outputs, analog sensor scaling, and Modbus ASCII over RS-232. Use Value: Integrated SCI with hardware start-bit detection and programmable baud rate simplifies RS-232 interface design and reduces external component count. |
| Legacy Test Equipment Controller | Embedded Data Logger |
Use Scenario: Controlling relay banks, reading front-panel switches, and driving 7-segment displays in benchtop multimeters and signal generators. IC Role / Device Role / Timing Role: Primary system controller executing keypad scanning, display multiplexing, and measurement sequencing in real time. Use Value: Fixed-direction Port A/B and strobed I/O support simplify hardware interfacing to discrete logic and LED drivers without glue logic. |
Use Scenario: Battery-powered environmental monitoring node recording temperature, humidity, and light intensity at 10-second intervals. IC Role / Device Role / Timing Role: Low-power data acquisition engine using STOP mode between readings and EEPROM for nonvolatile event storage. Use Value: 512 B on-chip EEPROM eliminates external memory chip, reducing BOM cost and PCB area while ensuring data retention during power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC11A8CP | Same core, 8 kB ROM instead of 512 B EEPROM; no on-chip nonvolatile program storage | Requires external EPROM or bootloader for firmware; unsuitable for field-upgradable devices | Select when firmware is fixed and cost-sensitive; avoid if EEPROM-based configuration or logging is needed |
| MC9S12XDP512 | 16-bit S12X core, 512 kB Flash, enhanced ADC (10-bit, 16-channel), CAN 2.0B interface | Higher performance, automotive-grade qualification, and CAN integration - but larger footprint and higher power | Select for new designs requiring CAN connectivity or >2 MIPS throughput; not drop-in compatible |
Compared with MC68HC11A1CFNE3R, MC68HC11A8CP lacks EEPROM and requires external code storage, while MC9S12XDP512 offers modern peripherals and flash but demands board redesign and toolchain migration.
Availability
MC68HC11A1CFNE3R is available at Aetrix Electronics and suitable for automotive sensor nodes, industrial I/O modules, legacy test equipment, and embedded data loggers requiring stable component supply and long-term obsolescence management.
Supply support for MC68HC11A1CFNE3R 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 high-performance mixed-signal ICs for automotive, industrial, and IoT markets.
The MC68HC11A1CFNE3R belongs to the legacy M68HC11 microcontroller family, designed for cost-sensitive, low-power embedded control applications where deterministic real-time response and on-chip analog integration are essential.
FAQ
What is the maximum bus frequency supported by the MC68HC11A1CFNE3R?
The MC68HC11A1CFNE3R supports a maximum bus frequency of 2 MHz in single-chip mode. This is derived from a 4 MHz crystal (or external clock) applied to XTAL/EXTAL, with the internal divide-by-two circuit generating the E-clock. Operation above 2 MHz violates AC timing specifications and may cause instruction execution errors or peripheral misbehavior.
Does the MC68HC11A1CFNE3R include on-chip program memory?
No, the MC68HC11A1CFNE3R does not include mask ROM or flash for program storage. It contains only 512 B of EEPROM (for data/configuration), 256 B of RAM, and a 256 B bootstrap monitor ROM accessible only in bootstrap mode. Firmware must be loaded externally via SCI or provided by an external memory device in expanded mode.
How many analog input channels does the MC68HC11A1CFNE3R ADC support?
The MC68HC11A1CFNE3R features a single 8-bit successive-approximation ADC with 12 selectable analog input channels (AN0–AN11), mapped to Port E pins PE0–PE7 and dedicated pins AD0–AD3. Channel selection is controlled via the ADCTL register, and conversions can be triggered manually or by timer events.
Can the MC68HC11A1CFNE3R operate in low-power modes?
Yes, the MC68HC11A1CFNE3R supports two low-power modes: WAIT and STOP. In WAIT mode, the CPU halts but clocks remain active for peripherals; current draw drops to ~1 mA. In STOP mode, all clocks halt except for RTI and IRQ wake sources; current falls to ~10 µA. Both modes are entered via WAIT/STOP instructions and exited by reset or enabled interrupts.
What package type is used for the MC68HC11A1CFNE3R?
The MC68HC11A1CFNE3R uses a 48-pin plastic dual in-line package (PDIP) with 0.6-inch body width and 0.1-inch pin pitch, designated as "FNE3" in Freescale/NXP ordering nomenclature. This package is pin-compatible with other MC68HC11A-series DIP variants and supports through-hole PCB assembly.
MC68HC11A1CFNE3R 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:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Data Converters:
- A/D 8x8b
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC68HC11A1CFNE3R FAQ
1.How can I place an order for MC68HC11A1CFNE3R through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC11A1CFNE3R 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 MC68HC11A1CFNE3R reliable?
The price and inventory of MC68HC11A1CFNE3R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC11A1CFNE3R is usually 5 days.
3.What payment methods are accepted for MC68HC11A1CFNE3R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68HC11A1CFNE3R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68HC11A1CFNE3R?
MC68HC11A1CFNE3R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC11A1CFNE3R 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 MC68HC11A1CFNE3R?
For technical support, including MC68HC11A1CFNE3R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC11A1CFNE3R requirements.
6.How does Aetrix verify that MC68HC11A1CFNE3R is sourced from the original manufacturer or authorized distributors?
All MC68HC11A1CFNE3R 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 MC68HC11A1CFNE3R meets industry standards.
7.What is the process for return or replacement of MC68HC11A1CFNE3R?
All MC68HC11A1CFNE3R units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC11A1CFNE3R, 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 MC68HC11A1CFNE3R part is unused and in its original packaging.
Return procedure for MC68HC11A1CFNE3R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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