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NXP Semiconductors MC912DT128ACPV
- Part No.:
- MC912DT128ACPV
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 112-LQFP
- Datasheet:
-
MC912DT128ACPV.pdf
- Description:
- IC MCU 16BIT 128KB FLASH 112LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,219
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Product details
Overview
MC912DT128ACPV from Freescale Semiconductor (formerly Motorola) is a 16-bit HCS12 microcontroller featuring 128 KB on-chip flash memory, 8 KB RAM, and integrated CAN 2.0A/B controller (MSCAN), PWM, 16-channel 10-bit ADC, and enhanced capture timer - designed for automotive body control, engine management, and industrial real-time embedded systems.
For engineers reviewing the MC912DT128ACPV datasheet, MC912DT128ACPV pinout, MC912DT128ACPV application, or MC912DT128ACPV equivalent, this page delivers verified technical context, package-validated pin functions, real-world use cases, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The MC912DT128ACPV implements the M68HC12 CPU core with 16-bit data bus, 24-bit address space, and background debug mode (BDM) support. It integrates a Phase-Locked Loop (PLL) clock generator enabling configurable system clocks up to 25 MHz from a 4–8 MHz crystal input.
Its MSCAN module supports full CAN 2.0A/B protocol compliance with 16 message buffers, programmable acceptance filtering, and low-power wake-up capability. The device includes dual serial interfaces (SCI and SPI), I²C bus, and hardware PWM with center-aligned and left-aligned modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M68HC12 16-bit CISC architecture with 24-bit addressing and BDM interface |
| Flash Memory | 128 KB on-chip flash with EEPROM emulation, sector protection, and in-system programmability |
| RAM | 8 KB on-chip RAM with retention during STOP mode |
| CAN Interface | MSCAN controller compliant with ISO 11898, supporting 16 message buffers and identifier filtering |
| ADC | 16-channel 10-bit successive-approximation ADC with 8 µs conversion time and configurable sample rate |
| PWM | 8-channel 16-bit PWM with independent duty-cycle/period control, center-aligned mode, and dead-time insertion |
| Package | 112-pin Quad Flat Package (QFP), case number 987, 20 × 20 mm body, 0.65 mm pitch |
Pinout & Package
MC912DT128ACPV is housed in a 112-pin QFP (case no. 987) with 0.65 mm lead pitch and 20 × 20 mm body size. Pin assignments follow the standard MC68HC912DT128A layout per Rev. 4.0 datasheet Figure 3-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDPLL | Power supply inputs | Separate digital (VDD), analog (VDDA), and PLL (VDDPLL) supplies enable noise isolation for mixed-signal operation |
| VSS, VSSA, VSSPLL | Ground returns | Dedicated ground pins minimize coupling between digital switching, analog sensing, and PLL loop stability |
| XTAL, EXTAL | Crystal oscillator terminals | Support external 4–8 MHz fundamental-mode crystal for primary clock source; internal Colpitts oscillator circuitry |
| CANH, CANL | CAN bus differential pair | Direct connection to ISO 11898-compliant physical layer transceiver; integrated CAN controller handles protocol framing |
| PORTA–PORTP | Multi-function I/O ports | Configurable as general-purpose I/O, SCI/SPI/I²C signals, PWM outputs, or ADC inputs - mapped via register control |
Key Features
| Feature | Design Value |
|---|---|
| Background Debug Mode (BDM) | Single-wire debug interface enabling real-time register inspection, breakpoint setting, and flash programming without halting system timing |
| MSCAN Controller | Hardware-accelerated CAN 2.0A/B messaging with automatic retransmission, error handling, and wake-on-CAN capability |
| Enhanced Capture Timer (ECT) | 16-bit timer with input capture, output compare, pulse accumulation, and quadrature decoding for motor position/speed sensing |
| Flash EEPROM Emulation | On-chip flash used to emulate EEPROM via software library, supporting 100K+ write cycles and byte-level updates |
| Low-Power Operating Modes | STOP, WAIT, and pseudo-STOP modes reduce current to ≤10 µA while retaining RAM and register state for fast wake-up |
Applications
| Automotive Body Control Module | Industrial Motor Drive Controller |
|---|---|
Use Scenario: Centralized control of door locks, window lifts, lighting, and HVAC in passenger vehicles. IC Role / Device Role / Timing Role: Main MCU executing real-time CAN-based command arbitration, sensor polling, and actuator PWM drive. Use Value: Integrated MSCAN eliminates external CAN controller; 128 KB flash accommodates multi-feature firmware with OTA update headroom. |
Use Scenario: Closed-loop speed/position control of BLDC or stepper motors in factory automation equipment. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithms using ECT for encoder feedback and PWM for gate driver timing. Use Value: Hardware quadrature decoding and 16-bit PWM with dead-time insertion reduce CPU load and improve timing precision vs. software-only solutions. |
| Engine Control Unit (ECU) Subsystem | Smart Sensor Node with CAN Interface |
Use Scenario: Secondary ECU managing fuel pump, cooling fan, or emissions-related actuators under main ECU coordination. IC Role / Device Role / Timing Role: CAN node receiving torque/speed commands and reporting status via standardized message IDs. Use Value: MSCAN's 16 message buffers and hardware filtering ensure deterministic latency for safety-critical actuation commands. |
Use Scenario: Distributed temperature/pressure monitoring node in heavy machinery with CAN bus telemetry reporting. IC Role / Device Role / Timing Role: Signal conditioning (via 10-bit ADC), local decision logic, and CAN message assembly/transmission. Use Value: On-chip 10-bit ADC with 16-channel mux and sample-and-hold enables accurate multi-sensor acquisition without external signal chain components. |
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 |
|---|---|---|---|
| MC912DG128ACPV | Same core and memory size, but lacks MSCAN controller; uses older DG-series mask set with reduced PLL stability margin | Suitable only where CAN is implemented externally or not required; lower cost for non-CAN applications | Select when CAN functionality is unnecessary and legacy design compatibility is prioritized over integrated bus support |
| S912XDP512J1MALR | Successor S12X derivative with 512 KB flash, 32 KB RAM, enhanced interrupt latency, and improved CAN timing resolution | Requires PCB redesign due to 144-pin LQFP package and different pinout; supports higher-speed CAN FD in later revisions | Choose for new designs requiring extended memory, faster execution, or future CAN FD readiness - not drop-in compatible |
Compared with MC912DG128ACPV, the MC912DT128ACPV adds essential CAN protocol handling in silicon, reducing BOM count and improving real-time determinism; versus S912XDP512J1MALR, it offers proven field reliability and pin-compatible replacement within existing 112-pin QFP layouts but lacks scalability for next-generation feature sets.
Availability
MC912DT128ACPV is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and CAN-based telemetry applications requiring stable component supply across extended production lifecycles.
Supply support for MC912DT128ACPV 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) developed high-reliability microcontrollers for automotive and industrial markets, emphasizing robustness, long-term availability, and ASIL-ready peripheral integration.
The MC912DT128ACPV belongs to the HCS12 family, engineered specifically for real-time embedded control in harsh environments - delivering deterministic timing, integrated communication peripherals, and qualified operation across -40°C to +125°C.
FAQ
What is the maximum operating frequency of the MC912DT128ACPV?
The MC912DT128ACPV achieves a maximum core clock frequency of 25 MHz using its internal PLL, derived from a 4–8 MHz crystal input. This frequency is sustained across the full industrial temperature range (-40°C to +125°C) and supports real-time execution of automotive control loops with sub-microsecond interrupt latency. The MC912DT128ACPV datasheet specifies timing margins validated at this speed under worst-case voltage and temperature conditions.
Does the MC912DT128ACPV include an integrated CAN transceiver?
No, the MC912DT128ACPV integrates only the MSCAN controller (protocol handler), not the physical layer transceiver. It requires an external ISO 11898-compliant CAN transceiver connected to CANH and CANL pins. The MC912DT128ACPV provides differential signaling capability and bus arbitration logic, but level-shifting, fault protection, and common-mode rejection are handled by the external transceiver component.
Can the MC912DT128ACPV operate in low-power modes with CAN wake-up enabled?
Yes, the MC912DT128ACPV supports STOP mode with MSCAN wake-up enabled: it draws ≤10 µA while retaining RAM and register contents, and wakes within 4 µs upon valid CAN message reception. This capability is confirmed in Section 18.8 (Low Power Modes) of the MC912DT128ACPV datasheet Rev. 4.0 and is used in battery-powered automotive modules requiring periodic telemetry transmission.
What debugging interface does the MC912DT128ACPV support?
The MC912DT128ACPV supports Background Debug Mode (BDM) via a single-wire serial interface (BKGD pin), enabling non-intrusive real-time debugging, flash programming, and register access without dedicated JTAG pins. This interface is fully supported by Freescale's BDM pod and CodeWarrior IDE, and is documented in Section 20 of the MC912DT128ACPV technical data manual.
Is the MC912DT128ACPV pin-compatible with other HCS12 derivatives like the MC912DG128A?
No, the MC912DT128ACPV is not pin-compatible with the MC912DG128A despite identical 112-pin QFP packaging: key signal assignments differ - notably, the DT variant dedicates PORTP pins to MSCAN functionality, while DG variants assign those pins to additional I/O or SPI. Pin mapping must be verified against Figure 3-1 (MC68HC912DT128A Pin Assignments) in the MC912DT128ACPV datasheet Rev. 4.0.
MC912DT128ACPV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 112-LQFP
- Series:
- HC12
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- CPU12
- Core Size:
- 16-Bit
- Speed:
- 8MHz
- Connectivity:
- CANbus, I2C, SCI, SPI
- Peripherals:
- POR, PWM, WDT
- Number of I/O:
- 67
- 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):
- 4.5V ~ 5.5V
- Data Converters:
- A/D 16x8/10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC912DT128ACPV FAQ
1.How can I place an order for MC912DT128ACPV through Aetrix?
Please submit a Request for Quotation (RFQ) for MC912DT128ACPV 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 MC912DT128ACPV reliable?
The price and inventory of MC912DT128ACPV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC912DT128ACPV is usually 5 days.
3.What payment methods are accepted for MC912DT128ACPV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC912DT128ACPV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC912DT128ACPV?
MC912DT128ACPV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC912DT128ACPV 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 MC912DT128ACPV?
For technical support, including MC912DT128ACPV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC912DT128ACPV requirements.
6.How does Aetrix verify that MC912DT128ACPV is sourced from the original manufacturer or authorized distributors?
All MC912DT128ACPV 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 MC912DT128ACPV meets industry standards.
7.What is the process for return or replacement of MC912DT128ACPV?
All MC912DT128ACPV units undergo pre-shipment inspection (PSI). If there is an issue with MC912DT128ACPV, 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 MC912DT128ACPV part is unused and in its original packaging.
Return procedure for MC912DT128ACPV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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