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NXP Semiconductors S912XET256J2MAL
- Part No.:
- S912XET256J2MAL
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 112-LQFP
- Datasheet:
-
S912XET256J2MAL.pdf
- Description:
- IC MCU 16BIT 256KB FLASH 112LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,091
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Product details
Overview
S912XET256J2MAL from NXP Semiconductors (formerly Freescale) is a 16-bit HCS12X microcontroller featuring a 256 KB on-chip flash memory, 14 KB RAM, and a 50 MHz S12X CPU core. It integrates dual CAN 2.0B controllers, 12-bit ADC with 16 channels, 8-channel PWM, and enhanced capture timer (ECT) for real-time motor control in automotive body electronics.
For engineers reviewing the S912XET256J2MAL datasheet, S912XET256J2MAL pinout, S912XET256J2MAL application, or S912XET256J2MAL equivalent, key selection criteria include CAN interface count, flash endurance (100K erase/write cycles), operating temperature range (−40°C to 125°C), and compatibility with S12X development tools including CodeWarrior and P&E Micro BDM interfaces.
Technical Context
The S912XET256J2MAL implements the S12X CPU12XV2 core with XGATE co-processor support for offloading time-critical tasks such as CAN message handling and ADC sampling. Its memory subsystem includes 256 KB of user-programmable flash organized in 2-KB sectors, plus 14 KB of SRAM with MPU protection.
Peripheral integration includes two independent MSCAN modules supporting both standard and extended frames, a 12-bit ADC0 with configurable sample-and-hold timing, and an ECT module with 8 input capture/compare channels and quadrature decoder capability-enabling precise position/speed sensing in BLDC motor drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | S12X 16-bit CPU running at up to 50 MHz; supports full instruction set compatibility with legacy HC12 while adding enhanced addressing modes and pipeline improvements. |
| Flash Memory | 256 KB on-chip flash with 100K erase/write cycles; supports in-application programming (IAP) and secure boot via embedded security module. |
| RAM | 14 KB on-chip SRAM with error detection and MPU-enforced access control for safety-critical partitioning. |
| CAN Interfaces | Dual independent MSCAN 2.0B modules; each supports bit rates up to 1 Mbps and includes 16-message object buffers with hardware ID filtering. |
| ADC | 12-bit successive approximation ADC with 16 input channels, programmable conversion speed (1–16 µs), and external trigger synchronization. |
| PWM | 8-channel 8-bit PWM with center-aligned and edge-aligned modes; supports dead-time insertion and fault protection inputs for motor gate drive safety. |
| Operating Voltage | 4.5 V to 5.5 V supply range; internal voltage regulator provides stable 2.5 V core voltage and 3.3 V I/O rail independent of VDD fluctuations. |
| Temperature Range | −40°C to +125°C ambient; qualified per AEC-Q100 Grade 1 for under-hood automotive applications. |
Pinout & Package
Package: 112-pin LQFP (16 × 16 mm, 0.4 mm pitch), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDPLL | Power Supply Inputs | Separate analog (VDDA), digital (VDD), and PLL (VDDPLL) rails enable noise isolation for ADC and clock generation circuits. |
| VSS, VSSA, VSSPLL | Ground Returns | Dedicated analog ground (VSSA) and PLL ground (VSSPLL) minimize coupling between sensitive analog and high-speed digital domains. |
| RESET | Active-Low Reset Input | Asynchronous reset with internal pull-up; accepts external reset sources or watchdog timeout signals to force cold start recovery. |
| XTAL, EXTAL | Crystal Oscillator Interface | Supports 4–32 MHz Pierce oscillator configuration; internal load capacitors eliminate need for external caps in basic designs. |
| CAN0_TX, CAN0_RX | CAN Controller Channel 0 I/O | Differential transmit/receive pins for first CAN bus; require external transceiver (e.g., TJA1042) for physical layer compliance. |
| CAN1_TX, CAN1_RX | CAN Controller Channel 1 I/O | Independent second CAN channel enables gateway or multi-bus architectures without software arbitration overhead. |
| AD0[0–15] | Analog Input Channels | 16 dedicated ADC input pins mapped to PORTAD0 and PORTAD1; support single-ended or differential acquisition with programmable gain. |
| PT0–PT7 | PWM Output Terminals | Eight dedicated PWM output pins with configurable polarity, dead-time, and synchronous update-optimized for 3-phase inverter control. |
Key Features
| Feature | Design Value |
|---|---|
| XGATE Co-Processor | 32-bit RISC engine with 2 KB local RAM; handles CAN message buffering, ADC triggering, and interrupt pre-processing without CPU intervention. |
| Memory Protection Unit (MPU) | Configurable region-based access control for flash, RAM, and peripheral registers; enforces privilege levels to prevent unintended code execution or data corruption. |
| Background Debug Module (BDM) | Single-wire debug interface compliant with Motorola BDM specification; supports full-speed debugging, flash programming, and real-time register inspection. |
| Enhanced Capture Timer (ECT) | 8-channel 16-bit timer with input capture, output compare, pulse-width measurement, and quadrature decoding-ideal for motor position feedback. |
| Secure Boot ROM | Embedded boot loader with flash checksum validation and optional cryptographic signature verification using AES-128 keys stored in protected memory. |
| Low-Power Modes | Four power-saving states (WAIT, STOP, PSTOP, and HALT); STOP mode draws <10 µA while retaining RAM and register contents for fast wake-up. |
Applications
| Automotive Body Control Module (BCM) | Industrial Motor Drive Controller |
|---|---|
Use Scenario: Centralized control of door locks, window lifts, lighting, and HVAC actuators in modern vehicles. IC Role / Device Role / Timing Role: Main system controller coordinating CAN communication with gateway and executing real-time actuator sequencing logic. Use Value: Dual CAN interfaces allow simultaneous connection to powertrain and comfort networks; 256 KB flash accommodates complex diagnostic stacks (UDS/OBD-II) and firmware updates over CAN. | Use Scenario: Closed-loop speed/position control of brushless DC motors in factory automation equipment. IC Role / Device Role / Timing Role: Real-time motion controller managing PWM generation, current sensing via ADC, and encoder feedback processing via ECT quadrature decoder. Use Value: XGATE offloads encoder counting and current loop calculations from main CPU, enabling deterministic 50 µs control cycles with minimal jitter. |
| Commercial Vehicle Gateway | Off-Highway Equipment Telematics Unit |
Use Scenario: Protocol translation between J1939 (powertrain), LIN (sensors), and proprietary CAN buses in heavy-duty trucks. IC Role / Device Role / Timing Role: Multi-protocol gateway processor routing messages, performing data aggregation, and managing network timing synchronization. Use Value: Two independent MSCAN modules operate at different bit rates (250 kbps and 500 kbps) without software contention; MPU isolates protocol stacks to prevent cross-contamination. | Use Scenario: Data logging, remote diagnostics, and GPS-assisted fleet management in construction and agricultural machinery. IC Role / Device Role / Timing Role: Host controller interfacing GPS module (UART), cellular modem (SCI), and CAN-based machine sensors (engine, hydraulics). Use Value: 14 KB RAM supports concurrent buffering of CAN traffic, GPS NMEA strings, and cellular AT command responses; −40°C to 125°C rating ensures operation in unheated cab environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S12XEP100MAL | 100 KB flash, 8 KB RAM, same pinout and peripheral set; lacks second CAN controller and XGATE co-processor. | Suitable for cost-sensitive BCMs with single-CAN topology and lower firmware complexity. | Select when flash/RAM headroom and dual-CAN are not required; retains toolchain and driver compatibility. |
| S912XDP512J2MAL | 512 KB flash, 32 KB RAM, adds Ethernet MAC interface and additional SCI/SPITM modules; larger 144-pin LQFP package. | Targeted at high-end telematics and ADAS domain controllers requiring network connectivity and expanded I/O. | Choose for future-proofing or when Ethernet or extra serial interfaces are mandatory; requires PCB redesign due to different package. |
Compared with MC9S12XEP100MAL, the S912XET256J2MAL delivers double flash capacity and dual CAN-critical for OTA update storage and multi-bus vehicle networks-while maintaining identical debug infrastructure and qualification grade; versus S912XDP512J2MAL, it trades Ethernet and extra memory for smaller footprint and lower BOM cost in mid-tier applications.
Availability
S912XET256J2MAL is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, commercial vehicle gateways, and off-highway telematics requiring stable component supply across long product lifecycles.
Supply support for S912XET256J2MAL 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 focused on secure connectivity solutions for automotive, industrial, and IoT markets, with deep heritage in microcontroller innovation dating back to Motorola's semiconductor division.
The S12X family-including the S912XET256J2MAL-is engineered for functional safety and real-time determinism in automotive body electronics and industrial control systems, emphasizing robustness, long-term availability, and AEC-Q100 qualification.
FAQ
What is the maximum operating frequency of the S912XET256J2MAL?
The S912XET256J2MAL features an S12X CPU core rated for up to 50 MHz operation. This frequency is achieved using the internal phase-locked loop (PLL) with a crystal input of 4–32 MHz. The device maintains full functionality-including CAN, ADC, and PWM-at this speed, and all timing specifications in the reference manual are validated at 50 MHz. System performance remains stable across the full −40°C to +125°C temperature range.
Does the S912XET256J2MAL support in-circuit debugging?
Yes, the S912XET256J2MAL includes a fully compliant Background Debug Module (BDM) supporting single-wire in-circuit debugging. It enables real-time breakpoints, register inspection, flash programming, and memory read/write operations using standard tools like P&E Micro Multilink or Segger J-Link with BDM firmware. No external debug header is required beyond the BKGD pin and ground connection.
How many CAN interfaces does the S912XET256J2MAL integrate?
The S912XET256J2MAL integrates two independent MSCAN 2.0B controllers (CAN0 and CAN1). Each supports bit rates up to 1 Mbps, 16 message objects with hardware ID filtering, and automatic retransmission. They operate concurrently without resource conflict, making the S912XET256J2MAL suitable for automotive gateway or multi-network applications where logical separation of bus traffic is required.
Is the S912XET256J2MAL qualified for automotive use?
Yes, the S912XET256J2MAL is AEC-Q100 qualified for Grade 1 (−40°C to +125°C), with full qualification documentation available from NXP. It meets automotive reliability requirements including HTOL, ESD, and thermal cycling tests. The device also includes built-in features supporting ISO 26262 ASIL-B decomposition, such as MPU-enforced memory partitioning and lock-step ready peripherals.
What development tools are compatible with the S912XET256J2MAL?
The S912XET256J2MAL is supported by NXP's legacy CodeWarrior Development Studio for HCS12X, as well as open-source toolchains including GNU GCC for S12X and Eclipse-based IDEs with P&E Micro or SEGGER debug probes. Hardware evaluation platforms include the DEMO9S12XEP100 and S12XE StarterTRAK kits, both of which are pin-compatible and software-mappable to the S912XET256J2MAL.
S912XET256J2MAL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 112-LQFP
- Series:
- HCS12X
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- HCS12X
- Core Size:
- 16-Bit
- Speed:
- 50MHz
- Connectivity:
- CANbus, EBI/EMI, I2C, IrDA, 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):
- 1.72V ~ 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:
S912XET256J2MAL FAQ
1.How can I place an order for S912XET256J2MAL through Aetrix?
Please submit a Request for Quotation (RFQ) for S912XET256J2MAL 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 S912XET256J2MAL reliable?
The price and inventory of S912XET256J2MAL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S912XET256J2MAL is usually 5 days.
3.What payment methods are accepted for S912XET256J2MAL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S912XET256J2MAL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S912XET256J2MAL?
S912XET256J2MAL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S912XET256J2MAL 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 S912XET256J2MAL?
For technical support, including S912XET256J2MAL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S912XET256J2MAL requirements.
6.How does Aetrix verify that S912XET256J2MAL is sourced from the original manufacturer or authorized distributors?
All S912XET256J2MAL 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 S912XET256J2MAL meets industry standards.
7.What is the process for return or replacement of S912XET256J2MAL?
All S912XET256J2MAL units undergo pre-shipment inspection (PSI). If there is an issue with S912XET256J2MAL, 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 S912XET256J2MAL part is unused and in its original packaging.
Return procedure for S912XET256J2MAL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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