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NXP Semiconductors MC9S12DJ256MFUE
- Part No.:
- MC9S12DJ256MFUE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 80-QFP
- Datasheet:
-
MC9S12DJ256MFUE.pdf
- Description:
- IC MCU 16BIT 256KB FLASH 80QFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,663
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Product details
Overview
MC9S12DJ256MFUE from Freescale Semiconductor is a 16-bit automotive-grade microcontroller featuring 256KB Flash EEPROM, 12KB RAM, 4KB EEPROM, dual 10-bit ADCs (16-channel total), two CAN 2.0A/B modules, J1850 BDLC interface, and an enhanced capture timer (ECT). It operates at up to 25MHz bus speed in single-chip mode and targets body control modules, gateway ECUs, and multiplexed vehicle networks.
For engineers reviewing the MC9S12DJ256MFUE datasheet, MC9S12DJ256MFUE pinout, MC9S12DJ256MFUE application, or MC9S12DJ256MFUE equivalent, key selection criteria include CAN/J1850 coexistence, 112-pin LQFP package with 91 I/Os, 5V-tolerant analog/digital I/O, and background debug (BDM) support for in-circuit development.
Technical Context
The MC9S12DJ256MFUE implements the CPU12 core with M68HC11 instruction set compatibility, HCS12 instruction queue, and enhanced indexed addressing. Its System Integration Module (SIM) manages clock generation via PLL (enabling 25MHz bus speed), reset control, interrupt routing, and multiplexed external bus interface supporting both 16-bit wide and 8-bit narrow modes.
Peripheral integration includes two asynchronous SCI interfaces, three SPI modules (SPI0–SPI2), I²C bus, and MSCAN12 modules with software-compatible CAN 2.0A/B protocol handling. The ECT provides eight input-capture/output-compare channels with programmable filters, while the BDLC module supports SAE J1850 VPW at 10.4 kbps with 4x receive mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | CPU12 16-bit core, upward compatible with M68HC11 instruction set and programmer's model |
| Flash Memory | 256KB Flash EEPROM with 16KB fixed boot sector and protected page windowing |
| RAM | 12KB on-chip RAM, mappable to top ($1000–$3FFF) or bottom ($0000–$2FFF) of address space |
| ADC | Two 10-bit, 8-channel ADC modules (16 total channels), with external trigger capability |
| CAN Interfaces | Two CAN 2.0A/B software-compatible modules (CAN0 and CAN4), each with five receive and three transmit buffers |
| J1850 Interface | SAE J1850 BDLC module supporting Variable Pulse Width (VPW) at 10.4 kbps with byte-level TX/RX and 4x receive mode |
| Package | 112-pin LQFP (case no. 987), 20 mm × 20 mm footprint, 0.4 mm pitch, 1.6 mm max height |
Pinout & Package
MC9S12DJ256MFUE is housed in a 112-pin LQFP package (case no. 987) with 5V-tolerant I/O, 5V A/D inputs, and internal 2.5V logic supply regulated from 5V. Pin functions are configurable per module routing (e.g., CAN0/CAN4 share pins with J1850/I²C), and all signals support Wake-Up from STOP/WAIT modes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PM0 / PM1 | CAN0 RX/TX | Dedicated differential CAN transceiver interface for CAN0 channel; supports wake-up in STOP mode |
| PJ6 / PJ7 | CAN4 RX/TX | Software-routable CAN4 interface shared with I²C SDA/SCL; enables dual-CAN operation without external mux |
| PS0–PS3 | SCI0 RX/TX, SCI1 RX/TX | Two full-duplex UART interfaces supporting LIN/UART diagnostics and serial telemetry |
| PP0–PP7 | PWM0–PWM7 / SPI2 | Eight-channel PWM with center/left-aligned outputs and independent duty-cycle control; also supports SPI2 slave/master |
| PA0–PA7 | ADDR8–ADDR15 / DATA8–DATA15 | Multiplexed 8-bit data/16-bit address bus for expanded memory interfacing in narrow mode |
| VDDA / VSSA / VRH / VRL | Analog Power & Reference | Separate 5V analog supply and ground with dedicated high/low reference inputs for ADC accuracy |
Key Features
| Feature | Design Value |
|---|---|
| Single-wire BDM debug | Enables real-time in-circuit debugging and flash programming using only BKGD pin-no JTAG header required |
| PLL clock multiplier | Generates 50MHz core clock from 4–8MHz crystal, enabling 25MHz bus speed while maintaining low EMI |
| Wake-up interrupt sources | 22 configurable I/O pins (Port H, Port P, Port J, IRQ/XIRQ) allow selective exit from STOP/WAIT with sub-10µs latency |
| Flexible CAN routing | CAN0 and CAN4 pins can be remapped under software control to avoid conflicts with I²C or J1850 on shared pins |
| Internal voltage regulator | On-chip 5V-to-2.5V regulator powers core logic, eliminating need for external 2.5V supply and reducing BOM count |
Applications
| Body Control Module (BCM) | Vehicle Gateway ECU |
|---|---|
Use Scenario: Centralized management of door locks, lighting, wipers, and HVAC in modern passenger vehicles. IC Role / Device Role / Timing Role: Primary MCU executing real-time control tasks, coordinating CAN messages between subsystems, and managing PWM-driven LED dimming. Use Value: Dual CAN modules enable simultaneous communication with powertrain and chassis networks; 16-channel ADC monitors sensor inputs (e.g., ambient light, temperature) without external signal conditioning. | Use Scenario: Protocol translation and message routing between CAN, LIN, and J1850 networks in multi-bus vehicle architectures. IC Role / Device Role / Timing Role: Bridge controller performing frame-level filtering, arbitration, and retransmission across heterogeneous buses. Use Value: Integrated J1850 BDLC and dual CAN eliminate need for discrete transceivers; BDM debug simplifies field firmware updates during validation. |
| Seat/Mirror Control Unit | Roof Module Controller |
Use Scenario: Position memory, motor control, and switch debouncing for power seats and side mirrors. IC Role / Device Role / Timing Role: Dedicated motion controller using ECT for precise timing of H-bridge gate drives and PWM current limiting. Use Value: Eight PWM channels drive up to four bidirectional DC motors with independent direction/speed control; 10-bit ADC reads potentiometer feedback with ±1 LSB INL. | Use Scenario: Integration of sunroof actuation, interior lighting, and rain sensor logic in overhead console assemblies. IC Role / Device Role / Timing Role: Low-power supervisory MCU monitoring wake events, managing sleep states, and sequencing high-side driver activation. Use Value: 22 wake-capable I/Os allow direct connection to switches/sensors; STOP-mode current < 10 µA extends battery life during vehicle off-state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S12DG256MFUE | Omits J1850 BDLC module; retains dual CAN, same memory and peripheral set otherwise | Suitable where J1850 legacy diagnostics are not required, e.g., newer platforms using CAN-based UDS | Select MC9S12DG256MFUE when J1850 is unnecessary-reduces software stack complexity and eliminates BDLC driver maintenance |
| S912XDP512J0 | Successor XGATE-enhanced derivative with 512KB Flash, 32KB RAM, and enhanced CAN FD readiness (not CAN FD capable) | Targets higher-complexity gateways requiring larger code space and future-proofing for CAN FD migration paths | Choose S912XDP512J0 for new designs needing extended memory and improved interrupt latency; not drop-in compatible due to pinout and register differences |
Compared with MC9S12DJ256MFUE, MC9S12DG256MFUE removes J1850 support but maintains identical CAN, ADC, and PWM capabilities-ideal for cost-sensitive CAN-only systems; S912XDP512J0 offers double Flash/RAM and XGATE coprocessor for offloading communications, though requiring PCB and firmware redesign.
Availability
MC9S12DJ256MFUE is available at Aetrix Electronics and suitable for automotive body electronics, gateway ECUs, and multiplexed control units requiring stable component supply across extended temperature ranges (−40°C to +125°C).
Supply support for MC9S12DJ256MFUE 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) is a fabless semiconductor company specializing in automotive, industrial, and networking processors and analog solutions.
The MC9S12D-Family was designed specifically for automotive multiplexing applications, emphasizing pin compatibility across memory/peripheral variants to enable scalable ECU development from entry-level to high-end gateways.
FAQ
What is the maximum bus speed supported by the MC9S12DJ256MFUE?
The MC9S12DJ256MFUE supports a maximum bus speed of 25MHz in single-chip mode (equivalent to 50MHz core clock via PLL), and 20MHz in expanded bus modes. This is achieved using the integrated phase-locked loop with external 4–8MHz crystal input. Bus speed directly governs peripheral timing-including ADC conversion rate, SCI baud generation, and ECT counter resolution-so design validation must confirm timing margins at worst-case voltage and temperature.
Does the MC9S12DJ256MFUE support CAN FD?
No, the MC9S12DJ256MFUE does not support CAN FD. It implements two MSCAN12 modules compliant exclusively with ISO 11898-1:2003 CAN 2.0A/B protocols, operating at up to 1 Mbps. CAN FD frame format, bit-rate switching, and extended data length (up to 64 bytes) are not implemented in the hardware or firmware stack. For CAN FD requirements, consider NXP's S32K series or legacy S12Z-Family derivatives.
How many ADC channels does the MC9S12DJ256MFUE provide, and what is their resolution?
The MC9S12DJ256MFUE integrates two 10-bit analog-to-digital converters (ATD0 and ATD1), each with eight input channels, for a total of 16 configurable ADC inputs. Both modules support external conversion triggers and share common reference pins (VRH/VRL). Resolution is strictly 10-bit (1024 codes); no oversampling or dithering modes are available to enhance effective resolution beyond this specification.
Can the MC9S12DJ256MFUE operate without an external crystal?
Yes, the MC9S12DJ256MFUE can operate using its internal oscillator in "limp-home" mode if the external crystal fails, but this mode limits bus speed to ≤2MHz and disables PLL operation. For full functionality-including 25MHz bus speed, accurate SCI baud rates, and reliable CAN timing-the external 4–8MHz crystal connected to EXTAL/XTAL pins is mandatory. Internal RC oscillators are not specified for production use in automotive applications per Freescale documentation.
Is the MC9S12DJ256MFUE pin-compatible with other MC9S12D-Family members?
Yes, all 112-pin LQFP variants in the MC9S12D-Family-including MC9S12DJ256MFUE, MC9S12DT256MFUE, and MC9S12DP256MFUE-are fully pin-compatible. This allows hardware reuse across memory/peripheral configurations (e.g., swapping J1850-enabled DJ versions for non-J1850 DG variants) without PCB changes. However, 80-pin QFP versions have different pinouts and reduced I/O count (59 vs. 91), so they are not interchangeable.
MC9S12DJ256MFUE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 80-QFP
- Series:
- HCS12
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- HCS12
- Core Size:
- 16-Bit
- Speed:
- 25MHz
- Connectivity:
- CANbus, I2C, SCI, SPI
- Peripherals:
- PWM, WDT
- Number of I/O:
- 59
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 12K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.35V ~ 5.25V
- Data Converters:
- A/D 16x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC9S12DJ256MFUE FAQ
1.How can I place an order for MC9S12DJ256MFUE through Aetrix?
Please submit a Request for Quotation (RFQ) for MC9S12DJ256MFUE 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 MC9S12DJ256MFUE reliable?
The price and inventory of MC9S12DJ256MFUE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC9S12DJ256MFUE is usually 5 days.
3.What payment methods are accepted for MC9S12DJ256MFUE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC9S12DJ256MFUE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC9S12DJ256MFUE?
MC9S12DJ256MFUE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC9S12DJ256MFUE 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 MC9S12DJ256MFUE?
For technical support, including MC9S12DJ256MFUE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC9S12DJ256MFUE requirements.
6.How does Aetrix verify that MC9S12DJ256MFUE is sourced from the original manufacturer or authorized distributors?
All MC9S12DJ256MFUE 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 MC9S12DJ256MFUE meets industry standards.
7.What is the process for return or replacement of MC9S12DJ256MFUE?
All MC9S12DJ256MFUE units undergo pre-shipment inspection (PSI). If there is an issue with MC9S12DJ256MFUE, 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 MC9S12DJ256MFUE part is unused and in its original packaging.
Return procedure for MC9S12DJ256MFUE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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