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NXP Semiconductors MC9S12DJ128BCFU
- Part No.:
- MC9S12DJ128BCFU
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 80-QFP
- Datasheet:
-
MC9S12DJ128BCFU.pdf
- Description:
- IC MCU 16BIT 128KB FLASH 80QFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,148
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Product details
Overview
MC9S12DJ128BCFU from Freescale Semiconductor is a 16-bit HCS12 microcontroller with 128 KB on-chip Flash EEPROM, 8 KB RAM, and integrated MSCAN, SPI, SCI, IIC, ATD, PWM, and ECT peripherals. It operates at up to 25 MHz bus clock via internal PLL, supports 5 V tolerant I/O, and targets automotive body control modules requiring CAN-based communication, sensor interfacing, and deterministic real-time control.
For engineers reviewing the MC9S12DJ128BCFU datasheet, MC9S12DJ128BCFU pinout, MC9S12DJ128BCFU application, or MC9S12DJ128BCFU equivalent, this page delivers verified technical context, package-validated pin functions, real-world use scenarios, and two confirmed alternative parts for automotive embedded design continuity.
Technical Context
The MC9S12DJ128BCFU implements the HCS12 CPU core with 16-bit data path, 24-bit address space, and background debug mode (BDM) via BKGD pin. Its Clock and Reset Generator (CRG) block supports crystal, external clock, or Pierce oscillator inputs and includes a PLL with programmable multiplication factor (1–32×) and loop filter (XFC pin).
It integrates dual 10-bit ATD converters (ATD0/ATD1), eight-channel 8-bit PWM, enhanced capture timer (ECT), and one MSCAN module compliant with ISO 11898-1. The device uses an 80-pin QFP package (JEDEC MS-026) with dedicated VDDA/VSSA for analog supply and separate VDDPLL/VSSPLL for phase-locked loop stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | HCS12 16-bit CPU with 24-bit addressing and BDM interface for in-circuit debugging. |
| Flash Memory | 128 KB on-chip Flash EEPROM with 10K write/erase cycles and 10-year data retention. |
| RAM Size | 8 KB on-chip SRAM, mapped at $2000–$3FFF, used for stack, variables, and buffer storage. |
| Bus Clock Speed | Up to 25 MHz derived from PLL (fOSC = 4 MHz × N, N = 1–32); enables real-time response ≤40 ns instruction cycle. |
| ADC Resolution | Dual 10-bit ATD converters (ATD0/ATD1), each with 8 input channels and configurable sample-and-hold timing. |
| CAN Interface | One MSCAN module supporting ISO 11898-1, 1 Mbit/s baud rate, 16 message buffers, and hardware ID filtering. |
| I/O Voltage Tolerance | 5 V tolerant digital I/O pins (PA–PS, PH–PJ, PK, PM, PP, PT) compatible with legacy automotive sensors and actuators. |
Pinout & Package
MC9S12DJ128BCFU is housed in an 80-pin Quad Flat Package (QFP), JEDEC MS-026 variant, with 0.65 mm lead pitch and exposed thermal pad. Pin assignments match Figure 2-2 of the Device User Guide (V01.09) for MC9S12DJ128B derivatives.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RESET | Active-low reset input | Asynchronous hardware reset; asserts internal logic, clears registers, and forces boot from vector table at $FFFE–$FFFF. |
| BKGD / TAGHI / MODC | Background debug / test mode control | Single-wire BDM interface for programming and real-time debugging; MODC selects operating mode during reset. |
| EXTAL / XTAL | Oscillator input/output pair | Connects to external crystal (4 MHz typical) or Pierce oscillator circuit; determines base clock source for CRG block. |
| XFC | PLL loop filter output | Drives external RC filter (R = 2.2 kΩ, C = 10 nF per Table 22-1) to stabilize PLL reference voltage and reduce jitter. |
| VDDA / VSSA | Analog power supply / ground | Isolated 5 V supply for ATD reference and analog front-end; minimizes noise coupling into ADC measurements. |
| VDDPLL / VSSPLL | PLL power supply / ground | Dedicated 5 V supply for PLL charge pump and VCO; prevents digital switching noise from degrading clock stability. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip voltage regulator (VREG) | Internal 2.5 V regulator for core logic; enabled via VREGEN pin; reduces external component count and improves power integrity. |
| Security module | Flash protection via SEC register; prevents unauthorized read-out of firmware; supports unsecuring only via full chip erase. |
| Low-power modes | Stop, Wait, and Pseudo Stop modes reduce current to ≤10 µA (Stop) and ≤5 mA (Wait); extends battery life in always-on automotive nodes. |
| Dual ATD converters | ATD0 and ATD1 operate independently with separate trigger sources (software, ECT, or PWM); enables synchronized multi-sensor acquisition. |
| MSCAN with time-triggered capability | Hardware timestamping and message buffering allow deterministic CAN scheduling without CPU overhead; meets AUTOSAR timing constraints. |
Applications
| Body Control Module (BCM) | Engine Control Unit (ECU) Subsystem |
|---|---|
Use Scenario: Centralized management of door locks, lighting, wipers, and HVAC in mid-tier vehicles. IC Role / Device Role / Timing Role: Main controller executing real-time state machines, polling switches, driving relays, and communicating via CAN to gateway and sensors. Use Value: Integrated MSCAN, PWM, and ATD eliminate need for discrete transceivers and ADCs; 128 KB Flash accommodates OTA update partitions. |
Use Scenario: Monitoring throttle position, coolant temperature, and intake air pressure for closed-loop fuel injection control. IC Role / Device Role / Timing Role: Sensor signal conditioner and actuator driver with sub-100 µs ADC-to-PWM latency for precise duty-cycle modulation. Use Value: Dual ATD converters enable simultaneous sampling of critical engine parameters; 25 MHz bus clock ensures <5 µs interrupt response for knock detection. |
| Instrument Cluster Display Controller | Seat/Mirror Position Memory Module |
Use Scenario: Driving analog gauges and LCD segments while receiving vehicle speed, RPM, and warning status over CAN. IC Role / Device Role / Timing Role: CAN message handler and PWM generator for stepper motor drivers and backlight dimming. Use Value: Eight-channel PWM supports independent brightness control for multiple displays; MSCAN RX FIFO prevents message loss during high-CPU-load graphics rendering. |
Use Scenario: Storing and recalling seat/mirror positions using non-volatile EEPROM and potentiometer feedback. IC Role / Device Role / Timing Role: EEPROM manager with wear-leveling logic and ATD-based position sensing via analog potentiometers. Use Value: On-chip 2 KB EEPROM retains user preferences across ignition cycles; ATD resolution of ±1 LSB (10-bit) enables <0.5° angular position accuracy. |
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 |
|---|---|---|---|
| MC9S12DG128CPBE | Same HCS12 core and peripheral set but in 112-pin LQFP; lacks Byteflight (BF) and BDLC blocks present in DT/DJ variants. | Preferred for designs needing more I/O (e.g., multiplexed display drivers) but not requiring J1850 or Byteflight protocols. | Select when board layout allows larger footprint and CAN+SPI+SCI functionality suffices without J1850 or BF. |
| S912XDP512J1MALR | Enhanced S12X core (pipeline, 50 MHz max bus clock), 512 KB Flash, added XGATE co-processor; pinout incompatible. | Required for higher-performance tasks like real-time PID tuning or multi-axis motor control where MC9S12DJ128BCFU's 25 MHz limit is insufficient. | Choose for new designs demanding >2× processing headroom and future-proof Flash capacity; requires PCB redesign. |
Compared with MC9S12DG128CPBE and S912XDP512J1MALR, the MC9S12DJ128BCFU offers optimal balance of CAN-enabled control, compact 80-pin packaging, and proven qualification for under-hood temperature ranges (−40°C to +125°C), making it ideal for cost-sensitive Tier 2 automotive modules where protocol flexibility (J1850/Byteflight) matters.
Availability
MC9S12DJ128BCFU is available at Aetrix Electronics and suitable for automotive body electronics, engine subsystems, instrument clusters, and seat/mirror memory modules requiring stable component supply and long-term industrial availability.
Supply support for MC9S12DJ128BCFU 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) pioneered automotive-grade microcontrollers with robust qualification, extended temperature operation, and CAN integration.
The MC9S12DJ128BCFU belongs to the HCS12 family, designed specifically for cost-effective, real-time automotive control applications requiring mixed-signal integration, functional safety readiness, and field-proven reliability in harsh environments.
FAQ
What is the maximum bus clock frequency supported by the MC9S12DJ128BCFU?
The MC9S12DJ128BCFU supports a maximum bus clock frequency of 25 MHz. This is achieved using the internal PLL with a 4 MHz crystal input multiplied by a factor of 6.25 (via fractional divider configuration). The PLL output drives the bus clock directly, enabling instruction execution at 40 ns per cycle and meeting real-time deadlines in automotive control loops.
Does the MC9S12DJ128BCFU include a hardware CAN controller?
Yes, the MC9S12DJ128BCFU includes one fully integrated MSCAN module compliant with ISO 11898-1. It supports standard and extended frame formats, programmable bit timing up to 1 Mbit/s, 16 message buffers with hardware ID filtering, and automatic retransmission. This eliminates the need for external CAN transceivers beyond the physical layer interface.
What package type and pin count does the MC9S12DJ128BCFU use?
The MC9S12DJ128BCFU uses an 80-pin Quad Flat Package (QFP) conforming to JEDEC MS-026. Its pinout matches the MC9S12DJ128B derivative as documented in Figure 2-2 of the Device User Guide (V01.09), including dedicated analog and PLL power pins (VDDA/VSSA, VDDPLL/VSSPLL) and BDM interface on BKGD.
Can the MC9S12DJ128BCFU operate without an external crystal?
Yes - the MC9S12DJ128BCFU supports three clock sources: external crystal (EXTAL/XTAL), external clock input (driven into EXTAL with XTAL grounded), or Pierce oscillator mode (using PE7=0 and external capacitors). All modes feed the CRG block, allowing flexible system-level clock architecture without mandatory crystal use.
How is flash memory protected against unauthorized access on the MC9S12DJ128BCFU?
Flash protection on the MC9S12DJ128BCFU is managed by the SEC (Security) register. When secured, the Flash cannot be read via BDM or background commands. Unsecuring requires a complete chip erase - no partial unlock or debug access is possible. This meets basic automotive IP protection requirements without external security ICs.
MC9S12DJ128BCFU 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:
- CANbus, I2C, SCI, SPI
- Peripherals:
- PWM, WDT
- Number of I/O:
- 59
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.35V ~ 5.25V
- Data Converters:
- A/D 16x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC9S12DJ128BCFU FAQ
1.How can I place an order for MC9S12DJ128BCFU through Aetrix?
Please submit a Request for Quotation (RFQ) for MC9S12DJ128BCFU 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 MC9S12DJ128BCFU reliable?
The price and inventory of MC9S12DJ128BCFU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC9S12DJ128BCFU is usually 5 days.
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Once your MC9S12DJ128BCFU 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 MC9S12DJ128BCFU?
For technical support, including MC9S12DJ128BCFU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC9S12DJ128BCFU requirements.
6.How does Aetrix verify that MC9S12DJ128BCFU is sourced from the original manufacturer or authorized distributors?
All MC9S12DJ128BCFU 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 MC9S12DJ128BCFU meets industry standards.
7.What is the process for return or replacement of MC9S12DJ128BCFU?
All MC9S12DJ128BCFU units undergo pre-shipment inspection (PSI). If there is an issue with MC9S12DJ128BCFU, 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 MC9S12DJ128BCFU part is unused and in its original packaging.
Return procedure for MC9S12DJ128BCFU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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