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NXP Semiconductors S912XDT256F1MAL
- Part No.:
- S912XDT256F1MAL
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 112-LQFP
- Datasheet:
-
S912XDT256F1MAL.pdf
- Description:
- IC MCU 16BIT 256KB FLASH 112LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,213
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Product details
Overview
S912XDT256F1MAL from NXP Semiconductors (formerly Freescale) is a 16-bit HCS12X microcontroller featuring the S12X CPU core, 256 KB on-chip Flash memory, 16 KB RAM, and integrated XGATE co-processor for offloading real-time tasks. It operates at up to 50 MHz, supports CAN 2.0B, multiple SCI/SPI/IIC interfaces, and includes dual 10-bit ADCs (ATD0/ATD1) with 16/8 channels respectively - used in automotive body control modules requiring deterministic interrupt response and mixed-signal processing.
For engineers reviewing the S912XDT256F1MAL datasheet, S912XDT256F1MAL pinout, S912XDT256F1MAL application, or S912XDT256F1MAL equivalent, key selection criteria include its 112-pin LQFP package, maskset-specific peripheral enablement (e.g., 3 SPI modules), XGATE-assisted interrupt latency reduction, and compatibility with legacy S12X development tools and BDM debug infrastructure.
Technical Context
The S912XDT256F1MAL implements the S12X CPU core with enhanced addressing modes and a 24-bit linear address space, paired with an independent XGATE RISC co-processor that executes interrupt service routines in parallel with main CPU execution. Its memory subsystem includes 256 KB Flash (with EEPROM emulation), 16 KB RAM, and configurable XGATE-accessible memory regions including 30 KB dedicated to XGATE code/data per Appendix E-6.
Peripheral integration follows the S12XD family architecture: dual ATD converters (ATD0: 16-channel, ATD1: 8-channel), 8-channel PWM, 8-channel enhanced capture timer (ECT), 3 SCI, 3 SPI, 1 IIC, and Freescale's Scalable CAN (MSCAN) module supporting full CAN 2.0B protocol with message buffering and time-triggered communication support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | S12X 16-bit CISC core with 24-bit addressing, enabling >64 KB linear memory access without banking |
| Flash Memory | 256 KB on-chip Flash with 10K erase cycles and 10-year data retention - sufficient for complex automotive firmware with OTA update partitions |
| RAM | 16 KB on-chip RAM, including 2 KB XGATE-dedicated RAM for low-latency co-processor task execution |
| ADC Resolution | Dual 10-bit ATD converters: ATD0 (16 channels), ATD1 (8 channels), each with configurable sample-and-hold and external trigger inputs |
| Communication Interfaces | 3 × SCI (UART), 3 × SPI, 1 × IIC, 1 × MSCAN - supports multi-bus vehicle networking with concurrent serial diagnostics and sensor interfacing |
| Package | 112-pin LQFP (16 × 16 mm, 0.4 mm pitch) - compatible with standard automotive PCB assembly processes and thermal management requirements |
| Operating Voltage | 4.5 V to 5.5 V VDD range, with internal 3.3 V regulator (VREG) supplying analog and digital domains independently |
Pinout & Package
Package: 112-pin LQFP (Pb-free, RoHS-compliant), thermal pad exposed on underside for enhanced heat dissipation in engine bay applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power supply and ground | 12 pairs distributed across package for low-impedance power delivery and noise suppression in high-EMI environments |
| VDDA, VSSA | Analog power and ground | Isolated analog domain supply pins - mandatory separation from digital VDD/VSS to maintain 10-bit ADC accuracy |
| EXTAL / XTAL | Crystal oscillator input/output | Supports 4–32 MHz crystal; enables precise clock generation for CAN bit timing and ADC sampling synchronization |
| RESET | Active-low reset input | Asynchronous reset with internal pull-up; accepts external watchdog or power monitor assertion for fail-safe recovery |
| CANL / CANH | CAN bus differential pair | Direct connection to ISO 11898-compliant transceiver - no level-shifting required for standard automotive CAN physical layer |
| SCI0_TX / SCI0_RX | Primary UART transmit/receive | Dedicated pins for bootloader communication, diagnostic services (UDS), and flash programming via BDM interface |
Key Features
| Feature | Design Value |
|---|---|
| XGATE co-processor | Independent 16-bit RISC engine with 2 KB local RAM - reduces CPU interrupt latency by handling time-critical ISR tasks (e.g., PWM updates, CAN message filtering) in parallel |
| Dual ATD converters | ATD0 (16-channel) and ATD1 (8-channel), each with programmable conversion sequences and external trigger inputs - enables synchronized sampling of multiple sensors (e.g., throttle, pedal, temperature) |
| MSCAN module | Freescale's Scalable CAN controller with 16-message buffers, hardware ID filtering, and time-triggered communication mode - meets AUTOSAR-compliant CAN stack requirements |
| Background Debug Mode (BDM) | Single-wire debug interface compliant with Motorola BDM specification - allows non-intrusive flash programming, breakpoint setting, and real-time register inspection during operation |
| EEPROM emulation | 2 KB of Flash configured as EEPROM-equivalent storage using S12XEETX2KV1 module - retains calibration data and fault logs across power cycles without external memory |
Applications
| Body Control Module (BCM) | Engine Control Unit (ECU) Subsystem |
|---|---|
Use Scenario: Centralized control of lighting, door locks, window lifts, and wiper systems in modern vehicles. IC Role / Device Role / Timing Role: Main system controller executing real-time state machines, managing CAN-based actuator commands, and sampling analog sensor inputs (e.g., ambient light, rain detection). Use Value: Dual ATD converters enable simultaneous sampling of multiple analog sensors; XGATE handles CAN message scheduling while CPU manages application logic - improving deterministic response under load. | Use Scenario: Dedicated subsystem for turbocharger control, exhaust gas recirculation (EGR), or fuel pump driver management within larger ECU architectures. IC Role / Device Role / Timing Role: Safety-critical sub-controller with independent CAN messaging, PWM-driven solenoid control, and fast ADC acquisition for pressure/temperature feedback loops. Use Value: 8-channel PWM with dead-time insertion supports precise valve timing; MSCAN's hardware message buffering ensures zero packet loss during high-speed CAN traffic bursts. |
| Industrial Motor Drive Interface | Heavy-Duty Vehicle Telematics Gateway |
Use Scenario: Bridge between PLC-level control signals and brushless DC motor drivers in factory automation equipment. IC Role / Device Role / Timing Role: Real-time interface processor converting Modbus RTU commands into PWM outputs and monitoring current/voltage feedback via ATD channels. Use Value: 50 MHz core speed enables sub-10 µs loop times; 3 SPI interfaces allow concurrent communication with isolated gate drivers, position encoders, and safety monitors. | Use Scenario: Aggregation and preprocessing node for J1939 and CAN FD data streams in commercial truck telematics units. IC Role / Device Role / Timing Role: Protocol translation engine routing messages between multiple CAN buses, performing basic filtering, and logging critical events to emulated EEPROM. Use Value: Dual CAN controllers (MSCAN + optional second instance) support redundant bus monitoring; 256 KB Flash accommodates dual-application firmware images for A/B update schemes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S12XDP512F1MAL | 512 KB Flash, 32 KB RAM, same pinout and peripheral set - differs only in memory size and maskset (1L15Y vs. M23S) | Required where larger firmware image size or extended data logging buffer is needed; otherwise functionally identical in software and hardware design | Select when future firmware growth or dual-bank OTA capability is mandated; no PCB or schematic changes required |
| S912XEQ512F1MAL | Same 512 KB Flash but uses EQ-series maskset (2M42E); includes additional LINPHY module and updated BDM revision | Preferred for LIN bus integration (e.g., seat/mirror control networks); lacks some S12XD-specific XGATE optimizations present in DT-series | Choose for new designs requiring native LIN support; not drop-in for existing S912XDT256F1MAL layouts due to different LIN pin assignments |
Compared with MC9S12XDP512F1MAL, the S912XDT256F1MAL offers optimized cost and power for mid-tier automotive functions without sacrificing XGATE acceleration or CAN performance; versus S912XEQ512F1MAL, it provides proven S12XD peripheral consistency and broader toolchain support for legacy maintenance projects.
Availability
S912XDT256F1MAL is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor interface modules, and heavy-duty vehicle telematics gateways requiring stable component supply, long-term lifecycle assurance, and automotive-grade qualification (AEC-Q100 Grade 2).
Supply support for S912XDT256F1MAL 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 leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep heritage in microcontroller innovation dating back to Motorola's 68HC11.
The S12X family - including the S912XDT256F1MAL - was engineered for deterministic real-time control in harsh automotive environments, emphasizing robust peripheral integration, debug reliability, and long-term manufacturing stability for Tier 1 suppliers.
FAQ
What is the maximum operating frequency of the S912XDT256F1MAL?
The S912XDT256F1MAL operates at a maximum core frequency of 50 MHz, achieved via its internal PLL with external crystal input (typically 8–16 MHz). This frequency enables real-time execution of complex control algorithms while maintaining sub-microsecond interrupt response times through XGATE offloading - critical for applications like PWM-driven actuator control in the S912XDT256F1MAL.
Does the S912XDT256F1MAL support CAN FD or only classical CAN?
The S912XDT256F1MAL supports only Classical CAN (ISO 11898-1, CAN 2.0B) via its MSCAN module - it does not implement CAN FD features such as flexible data-rate or extended payload length. Its MSCAN controller is fully compatible with J1939 and OBD-II protocols but requires external CAN FD transceivers and gateway arbitration if CAN FD integration is needed in the same system as the S912XDT256F1MAL.
How much XGATE-accessible memory is allocated in the S912XDT256F1MAL?
The S912XDT256F1MAL allocates 30 KB of Flash memory specifically for XGATE code and data storage, as confirmed in Appendix E-6 of the MC9S12XDP512 datasheet (Rev. 2.21). This region resides in the upper Flash segment and is accessible exclusively by the XGATE co-processor - enabling autonomous execution of time-critical tasks without CPU intervention in the S912XDT256F1MAL.
What debug interface does the S912XDT256F1MAL use, and is JTAG supported?
The S912XDT256F1MAL uses Freescale's Background Debug Mode (BDM) interface - a single-wire, proprietary debug protocol implemented on the BKGD pin. It does not support standard JTAG; BDM provides full flash programming, real-time register inspection, and breakpoint control via compatible debug probes (e.g., P&E Micro Cyclone or Segger J-Link with BDM firmware). All official toolchains for the S912XDT256F1MAL rely on BDM.
Is the S912XDT256F1MAL pin-compatible with other S12X derivatives like the MC9S12XDP512?
Yes - the S912XDT256F1MAL is pin-compatible with the MC9S12XDP512F1MAL and other 112-pin LQFP S12X derivatives (e.g., S912XEQ512), sharing identical mechanical footprint, power pin distribution, and peripheral signal mapping. Differences are limited to maskset-specific peripheral enablement (e.g., number of SPI modules) and memory size - making the S912XDT256F1MAL a direct hardware replacement where 256 KB Flash suffices.
S912XDT256F1MAL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 112-LQFP
- Series:
- HCS12X
- Packaging:
- Tray
- Product Status:
- Last Time Buy
- Programmable:
- Not Verified
- Core Processor:
- HCS12X
- Core Size:
- 16-Bit
- Speed:
- 80MHz
- Connectivity:
- CANbus, I2C, SCI, SPI
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 91
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 16K x 8
- Voltage - Supply (Vcc/Vdd):
- 3.15V ~ 5.5V
- Data Converters:
- A/D 16x12b
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
S912XDT256F1MAL FAQ
1.How can I place an order for S912XDT256F1MAL through Aetrix?
Please submit a Request for Quotation (RFQ) for S912XDT256F1MAL 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 S912XDT256F1MAL reliable?
The price and inventory of S912XDT256F1MAL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S912XDT256F1MAL is usually 5 days.
3.What payment methods are accepted for S912XDT256F1MAL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S912XDT256F1MAL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S912XDT256F1MAL?
S912XDT256F1MAL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S912XDT256F1MAL 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 S912XDT256F1MAL?
For technical support, including S912XDT256F1MAL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S912XDT256F1MAL requirements.
6.How does Aetrix verify that S912XDT256F1MAL is sourced from the original manufacturer or authorized distributors?
All S912XDT256F1MAL 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 S912XDT256F1MAL meets industry standards.
7.What is the process for return or replacement of S912XDT256F1MAL?
All S912XDT256F1MAL units undergo pre-shipment inspection (PSI). If there is an issue with S912XDT256F1MAL, 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 S912XDT256F1MAL part is unused and in its original packaging.
Return procedure for S912XDT256F1MAL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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