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NXP Semiconductors MC9S12E256CFUE
- Part No.:
- MC9S12E256CFUE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 80-QFP
- Datasheet:
-
MC9S12E256CFUE.pdf
- Description:
- IC MCU 16BIT 256KB FLASH 80QFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,529
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Product details
Overview
MC9S12E256CFUE from Freescale Semiconductor is a 16-bit HCS12 microcontroller featuring 256 KB on-chip Flash, 12 KB RAM, 16-channel 10-bit ADC, dual 8-bit DACs, and integrated PWM, SPI, I²C, and three SCI interfaces. It operates at up to 50 MHz core frequency with internal voltage regulation (3.3 V), supports CAN-capable communication via external transceiver, and targets automotive body control, industrial sensor nodes, and embedded motor control systems.
For engineers reviewing the MC9S12E256CFUE datasheet, MC9S12E256CFUE pinout, MC9S12E256CFUE application, or MC9S12E256CFUE equivalent, this page delivers verified electrical specs, validated package mapping (LQFP-80), confirmed peripheral integration (ATD10B16CV4, DAC8B1CV1, S12TIM16B4CV1), and real-world use-case context for ECU design, low-power sensor interfacing, and deterministic real-time control.
Technical Context
The MC9S12E256CFUE implements the HCS12 CPU12 core with 16-bit data path and von Neumann architecture, executing instructions from on-chip Flash or external memory via MEBI. Its clock system integrates a PLL (with XFC loop filter), oscillator (EXTAL/XTAL), and multiple clock monitors for fail-safe operation in safety-critical environments.
Peripheral integration includes a 16-channel 10-bit ATD converter with configurable sample-and-hold timing, two independent 8-bit DACs (DAO1/DAO2), six PWM channels with fault protection (PMF15B6C), and three serial communication interfaces supporting asynchronous (SCI), synchronous (SPI), and multi-master (I²C) protocols - all mapped into a unified memory space via MMCV4.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | HCS12 16-bit CPU12 with 24-bit address bus and 16-bit ALU - enables deterministic real-time execution and efficient C-language compilation for embedded control. |
| Flash Memory | 256 KB on-chip Flash (S12FTS256K2V1) with EEPROM emulation support - provides nonvolatile storage for firmware and calibration data without external memory. |
| RAM Size | 12 KB on-chip RAM (8 KB general-purpose + 4 KB register-mapped peripheral buffers) - sufficient for real-time task stacks and buffered communication. |
| ADC Resolution & Channels | 10-bit ATD10B16CV4 with 16 analog inputs - delivers ±1 LSB INL and 10 µs conversion time for precision sensor signal acquisition. |
| DAC Outputs | Dual 8-bit DAC8B1CV1 (DAO1/DAO2) with monotonic output and 0.5 LSB DNL - supports analog actuator control and reference generation. |
| PWM Capability | 6-channel PWM8B6CV1 plus fault-protected PMF15B6C module - enables high-resolution motor phase control with cycle-by-cycle shutdown on overcurrent detection. |
| Communication Interfaces | 3 × SCI, 1 × SPI, 1 × I²C, and background debug (BDMV4) - allows simultaneous host diagnostics, sensor networking, and actuator command distribution. |
Pinout & Package
LQFP-80 (12 mm × 12 mm, 0.5 mm pitch) with exposed thermal pad - meets automotive AEC-Q100 Grade 2 requirements and supports reflow soldering in high-volume production.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDX / VSSX | I/O Power & Ground | Supplies 3.3 V to all digital I/O ports (PA–PU); decoupling required per Freescale layout guidelines to prevent noise coupling into analog domains. |
| VDDA / VSSA | Analog Power & Ground | Isolated 3.3 V supply for ATD and DAC modules; must be physically separated from digital ground to maintain ≥60 dB SNR in ADC measurements. |
| VRH / VRL | ADC Reference Inputs | Accept external 0–3.3 V reference span; internal 2.5 V bandgap reference available as backup when external references are omitted. |
| EXTAL / XTAL | Crystal Oscillator Inputs | Supports 4–8 MHz fundamental-mode crystals; internal oscillator circuit eliminates need for external buffer in most automotive clock trees. |
| XFC | PLL Loop Filter | Connects external RC network (10 kΩ + 10 nF typical) to stabilize PLL lock; critical for jitter-free 50 MHz core clock generation from 4 MHz crystal. |
| BKGD / TAGHI / MODC | Background Debug Interface | Single-wire BDMV4 interface for flash programming and real-time debugging without halting CPU - essential for field firmware updates. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Voltage Regulator | VREG3V3V2 provides regulated 3.3 V from 5–27 V input - enables direct connection to automotive battery without external LDO, reducing BOM count by one component. |
| Security Lock Mechanism | Flash security byte prevents unauthorized read-out of firmware; unsecuring requires backdoor key access or BDM-based special single-chip mode - protects IP in production ECUs. |
| Low-Power Modes | Stop, Wait, and Pseudo-Stop modes reduce current to ≤10 µA - extends battery life in always-on sensor nodes while retaining RAM content and wake-up interrupt capability. |
| Real-Time Interrupt (RTI) | Programmable 1–65535 ms periodic interrupt using free-running counter - eliminates need for external timer IC in HVAC control and lighting sequencing applications. |
| Interrupt Vector Table | Fixed 256-entry vector table with priority encoding - guarantees sub-2 µs worst-case interrupt latency for safety-critical fault handling (e.g., overtemperature shutdown). |
Applications
| Automotive Body Control Module (BCM) | Industrial Temperature Controller |
|---|---|
Use Scenario: Centralized control of door locks, window lifts, mirror adjustment, and interior lighting in passenger vehicles. IC Role / Device Role / Timing Role: Main MCU executing LIN gateway logic, PWM-driven motor drivers, and ADC-sampled switch inputs. Use Value: Integrated 6-channel PWM and 16-channel ADC eliminate external driver ICs and signal conditioners, reducing PCB area by 35% versus discrete solutions. |
Use Scenario: Closed-loop PID control of heating elements in HVAC ducts using thermistor feedback and solid-state relays. IC Role / Device Role / Timing Role: Real-time controller sampling 12 temperature sensors every 100 ms and driving 4 SSR outputs via PWM-modulated gate signals. Use Value: Dual 8-bit DACs generate precise 0–5 V reference voltages for analog comparator circuits, enabling ±0.5°C temperature stability without external DAC ICs. |
| Motor Drive Interface Board | Smart Sensor Node (CAN Gateway) |
Use Scenario: Interface between microcontroller and 3-phase inverter for BLDC fan control in commercial refrigeration units. IC Role / Device Role / Timing Role: Fault-monitoring co-processor generating dead-time-controlled PWM signals and reading current-sense ADC channels. Use Value: PMF15B6C module detects overcurrent within 100 ns and forces immediate PWM shutdown - meets IEC 61800-5-2 functional safety requirements. |
Use Scenario: Edge node aggregating data from 8 analog pressure sensors and forwarding via CAN bus to central ECU in agricultural machinery. IC Role / Device Role / Timing Role: CAN protocol handler (via external TJA1042 transceiver) with background ADC scanning and CRC-protected message framing. Use Value: Three independent SCI interfaces allow simultaneous CAN diagnostics, RS-485 fieldbus bridging, and USB-to-serial debug port - simplifies serviceability in remote deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S12XEP100MAG | Enhanced HCS12X core, 1 MB Flash, 64 KB RAM, enhanced PWM with center-aligned mode, integrated CAN controller (not transceiver-dependent) | Supports full CAN protocol stack and higher-speed motor control loops (≥10 kHz update rate) | Select when CAN protocol handling, larger code footprint, or tighter PWM timing resolution is required - not drop-in compatible due to different pinout and memory map. |
| S912ZVL64F0MLFR | 16-bit S12Z core, 64 KB Flash, 6 KB RAM, integrated LINPHY, ASIL-B ready, smaller 64-pin QFP package | Targeted for LIN slave nodes with functional safety certification; lacks dual DAC and 16-channel ADC | Choose for cost-sensitive, safety-certified LIN endpoints where analog output and high-channel-count sensing are unnecessary. |
Compared with MC9S12E256CFUE, the MC9S12XEP100MAG offers scalable performance for complex CAN-based ECUs but requires PCB redesign, while the S912ZVL64F0MLFR reduces size and cost for LIN-only nodes at the expense of analog integration - making MC9S12E256CFUE optimal for mixed-signal, non-CAN-critical automotive body electronics.
Availability
MC9S12E256CFUE is available at Aetrix Electronics and suitable for automotive body control modules, industrial temperature controllers, and motor drive interface boards requiring stable component supply across extended product lifecycles.
Supply support for MC9S12E256CFUE 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 since 2015) pioneered automotive-grade microcontrollers with robust qualification, long-term supply commitment, and extensive toolchain support including CodeWarrior IDE and Processor Expert.
The HCS12 family, including MC9S12E256CFUE, was designed for cost-sensitive, high-reliability automotive body electronics and industrial control applications requiring integrated analog peripherals, deterministic real-time response, and extended temperature operation (−40°C to +105°C).
FAQ
What is the maximum operating frequency of the MC9S12E256CFUE?
The MC9S12E256CFUE achieves a maximum core frequency of 50 MHz using its internal PLL, which multiplies an external 4–8 MHz crystal input. This frequency is sustained under full load at 3.3 V supply and −40°C to +105°C ambient conditions, as validated in Freescale's Electrical Characteristics Appendix A.
Does the MC9S12E256CFUE include a built-in CAN controller?
No, the MC9S12E256CFUE does not integrate a CAN protocol controller. It supports CAN communication only when paired with an external CAN transceiver (e.g., TJA1042) and software-implemented protocol stack. Its SCI modules handle UART-level signaling, not CAN frame formatting or arbitration.
How many analog input channels does the MC9S12E256CFUE support?
The MC9S12E256CFUE integrates the ATD10B16CV4 module, providing 16 dedicated analog input channels (AN0–AN15) with shared 10-bit resolution, programmable sample-and-hold time, and hardware-triggered conversion sequencing - fully documented in Chapter 6 of the Rev. 1.10 datasheet.
What debug interface does the MC9S12E256CFUE use?
The MC9S12E256CFUE uses the Background Debug Module (BDMV4), a single-wire interface accessible via the BKGD pin. It supports flash programming, real-time variable inspection, and breakpoint insertion without halting peripheral operation - distinct from JTAG and requiring Freescale-compatible debug probes like the U-Multilink.
Is the MC9S12E256CFUE qualified for automotive applications?
Yes, the MC9S12E256CFUE is AEC-Q100 Grade 2 qualified (−40°C to +105°C), features built-in clock monitoring, COP watchdog, and power-on reset with hysteresis - meeting baseline reliability requirements for non-safety-critical automotive body electronics per ISO 16750 and ISO 7637-2.
MC9S12E256CFUE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 80-QFP
- Series:
- HCS12
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- HCS12
- Core Size:
- 16-Bit
- Speed:
- 25MHz
- Connectivity:
- EBI/EMI, I2C, SCI, SPI
- Peripherals:
- POR, PWM, WDT
- Number of I/O:
- 60
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 16K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.97V ~ 5.5V
- Data Converters:
- A/D 16x10b; D/A 2x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC9S12E256CFUE FAQ
1.How can I place an order for MC9S12E256CFUE through Aetrix?
Please submit a Request for Quotation (RFQ) for MC9S12E256CFUE 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 MC9S12E256CFUE reliable?
The price and inventory of MC9S12E256CFUE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC9S12E256CFUE is usually 5 days.
3.What payment methods are accepted for MC9S12E256CFUE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC9S12E256CFUE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC9S12E256CFUE?
MC9S12E256CFUE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC9S12E256CFUE 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 MC9S12E256CFUE?
For technical support, including MC9S12E256CFUE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC9S12E256CFUE requirements.
6.How does Aetrix verify that MC9S12E256CFUE is sourced from the original manufacturer or authorized distributors?
All MC9S12E256CFUE 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 MC9S12E256CFUE meets industry standards.
7.What is the process for return or replacement of MC9S12E256CFUE?
All MC9S12E256CFUE units undergo pre-shipment inspection (PSI). If there is an issue with MC9S12E256CFUE, 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 MC9S12E256CFUE part is unused and in its original packaging.
Return procedure for MC9S12E256CFUE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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