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NXP Semiconductors MC9S12XEG128MAL
- Part No.:
- MC9S12XEG128MAL
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 112-LQFP
- Datasheet:
-
MC9S12XEG128MAL.pdf
- Description:
- IC MCU 16BIT 128KB FLASH 112LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MC9S12XEG128MAL from NXP (formerly Freescale) is a 16-bit HCS12X microcontroller featuring a 50 MHz S12X CPU core, 128 KB on-chip Flash memory, 8 KB RAM, and integrated XGATE coprocessor for offloading time-critical tasks. It supports CAN 2.0B, SPI, SCI, I²C, and multiple PWM/ECT channels, and is qualified for automotive applications per AEC-Q100 Grade 2 (-40°C to +105°C). It targets engine control units and body electronics requiring deterministic real-time response.
For engineers reviewing the MC9S12XEG128MAL datasheet, MC9S12XEG128MAL pinout, MC9S12XEG128MAL application, or MC9S12XEG128MAL equivalent, key selection criteria include its 112-pin LQFP package, dual CAN controllers with message buffers, XGATE's autonomous peripheral handling, 10-bit ADC with 16 channels, and hardware memory protection unit (MPU) for safety-critical firmware partitioning.
Technical Context
The MC9S12XEG128MAL implements the S12X CPU12XV2 core with enhanced addressing modes and instruction set compatibility with legacy HCS12. Its XGATE module operates as an independent 16-bit RISC coprocessor with dedicated RAM and interrupt vector table, enabling concurrent execution of background tasks without CPU intervention.
It integrates dual MSCAN modules supporting full CAN 2.0B protocol with 16 message buffers each, programmable baud rates up to 1 Mbps, and automatic retransmission. The ECT (Enhanced Capture Timer) provides eight 16-bit channels with input capture, output compare, and PWM generation capabilities, synchronized to internal or external clock sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | S12X 16-bit CPU running at 50 MHz - delivers deterministic real-time performance with 1.25 DMIPS/MHz and backward compatibility with HCS12 code. |
| Flash Memory | 128 KB on-chip Flash with EEPROM emulation - enables field firmware updates and data logging without external non-volatile storage. |
| RAM | 8 KB on-chip RAM - sufficient for real-time task stacks, CAN message buffers, and sensor data processing in automotive ECUs. |
| CAN Interfaces | Dual MSCAN modules, each with 16 message buffers - supports redundant communication paths or multi-bus architectures (e.g., powertrain + body networks). |
| ADC | 10-bit successive-approximation ADC with 16 input channels and hardware-triggered conversion - suitable for analog sensor acquisition (e.g., throttle position, temperature). |
| XGATE Coprocessor | Independent 16-bit RISC engine with 1 KB local RAM - handles time-critical ISR servicing (e.g., CAN RX/TX, PWM updates) without CPU context switching overhead. |
| Operating Temperature | AEC-Q100 Grade 2: -40°C to +105°C - validated for under-hood automotive environments with thermal stress and voltage transients. |
| Package | 112-pin LQFP (16 × 16 mm, 0.4 mm pitch) - compatible with standard SMT assembly and provides dedicated power/ground pins for noise-sensitive analog and digital domains. |
Pinout & Package
MC9S12XEG128MAL is housed in a 112-pin Low-Profile Quad Flat Package (LQFP) with exposed thermal pad, optimized for automotive PCB layouts requiring thermal dissipation and EMI control. Pin assignments follow Freescale's S12XE family layout, with dedicated VDD/VSS pairs per functional block and separate analog/digital supply domains.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA / VSSA | Analog Power Supply / Ground | Isolated analog domain powering ADC, voltage regulator, and bandgap reference - critical for <1 LSB ADC error across temperature. |
| VDDD / VSSD | Digital Power Supply / Ground | Dedicated digital domain for CPU, XGATE, and logic peripherals - minimizes switching noise coupling into analog sections. |
| RESET | Active-Low Reset Input | Asynchronous reset with internal pull-up; initiates cold start sequence including clock initialization and Flash security lock check. |
| CRGCLK | Crystal Oscillator Input | Accepts 4–8 MHz fundamental-mode crystal; feeds PLL to generate internal 50 MHz system clock with ±0.5% stability over temperature. |
| CAN0_TX / CAN0_RX | CAN Controller Channel 0 Differential Outputs | Direct connection to external CAN transceiver (e.g., TJA1042); supports high-speed CAN up to 1 Mbps with loopback self-test mode. |
| CAN1_TX / CAN1_RX | CAN Controller Channel 1 Differential Outputs | Independent second CAN bus - enables gateway functionality between isolated vehicle networks without software arbitration. |
| AD0[0–15] | Analog Input Channels | 16 single-ended inputs routed to 10-bit ADC; configurable for external sensor signals (e.g., MAP, coolant temp) with programmable sample-and-hold timing. |
| PT0–PT7 | Port T General-Purpose I/O | 8-bit port with edge-triggered interrupts, pull-up/pull-down control, and polarity inversion - used for discrete switch inputs or LED status indicators. |
Key Features
| Feature | Design Value |
|---|---|
| XGATE Coprocessor | Offloads CAN message handling, PWM updates, and ADC triggering from main CPU - reduces worst-case interrupt latency to <2 µs and frees 30% CPU bandwidth for application logic. |
| Dual MSCAN Modules | Each with 16 message buffers, acceptance filtering, and automatic retransmission - eliminates need for external CAN protocol accelerators in multi-bus systems. |
| Memory Protection Unit (MPU) | Configurable region-based access control for Flash/RAM - enforces separation between bootloader, safety-critical control code, and calibration data per ISO 26262 ASIL-B requirements. |
| Background Debug Module (BDM) | Single-wire debug interface supporting full-speed execution control, register inspection, and Flash programming - enables in-vehicle diagnostics and calibration without JTAG header. |
| Enhanced Capture Timer (ECT) | Eight 16-bit channels with input capture, output compare, and center-aligned PWM - supports precise ignition timing, fuel injection pulse width, and motor phase control. |
| Voltage Regulator (VREG) | On-chip 3.3 V regulator with internal bandgap reference - eliminates external LDO for core logic, reducing BOM count and improving power supply rejection ratio (PSRR). |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time management of fuel injection timing, spark advance, and air-fuel ratio feedback using crank/cam sensors and O2 inputs. IC Role / Device Role / Timing Role: Primary controller executing closed-loop combustion algorithms with sub-millisecond deterministic response via ECT and XGATE-managed ADC sampling. Use Value: Enables compliance with Euro 6 emissions standards through precise 1° crank-angle resolution timing and adaptive learning of cylinder-specific corrections. | Use Scenario: Centralized control of door locks, lighting, wipers, and HVAC based on switch inputs, ambient sensors, and LIN/CAN commands. IC Role / Device Role / Timing Role: System coordinator managing multiple low-speed peripherals via SCI/LIN and high-speed CAN messaging with guaranteed message latency ≤500 µs. Use Value: Reduces wiring harness complexity by consolidating functions previously requiring three separate microcontrollers into one MC9S12XEG128MAL-based module. |
| Transmission Control Unit (TCU) | Electric Power Steering (EPS) |
Use Scenario: Closed-loop hydraulic pressure control and gear shift scheduling using turbine speed, output shaft speed, and throttle position inputs. IC Role / Device Role / Timing Role: Safety-relevant controller executing ASIL-B torque demand arbitration and solenoid driver PWM with hardware fault detection via MPU and watchdog timers. Use Value: Achieves <100 ms fail-safe transition to limp-home mode upon detected sensor or actuator fault, meeting ISO 26262 requirements. | Use Scenario: Torque assist calculation and motor phase commutation using steering angle, torque sensor, and vehicle speed signals. IC Role / Device Role / Timing Role: Real-time motor controller synchronizing 20 kHz FOC (Field-Oriented Control) loops using ECT-generated PWM and XGATE-handled current sensing ADC triggers. Use Value: Delivers <50 µs current loop update time, enabling smooth assist feel and eliminating torque ripple above 10 Hz. |
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, no XGATE, single CAN, same 112-pin LQFP package | Limited to simpler ECUs without dual-bus or high-throughput peripheral offload requirements | Select when cost sensitivity outweighs need for dual CAN or XGATE acceleration; retains pin and software compatibility for scaled-down designs. |
| S912XEQ512J2MAG | 512 KB Flash, 32 KB RAM, dual CAN, XGATE, but 144-pin LQFP package | Higher memory capacity and I/O count for complex gateway or ADAS fusion controllers | Choose for next-generation platforms requiring larger OTA update partitions or additional sensor interfaces; requires PCB redesign due to pin count and layout. |
Compared with MC9S12XEG128MAL, MC9S12XEP100MAL offers reduced memory and peripheral set at lower cost in identical packaging, while S912XEQ512J2MAG extends scalability with 4× Flash and expanded I/O - making MC9S12XEG128MAL the optimal balance of automotive-grade features, footprint, and cost for mid-tier powertrain and chassis controllers.
Availability
MC9S12XEG128MAL is available at Aetrix Electronics and suitable for engine control units, transmission control modules, and electric power steering systems requiring stable component supply, long-term automotive qualification, and traceable manufacturing history.
Supply support for MC9S12XEG128MAL 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 applications, with deep expertise in automotive microcontrollers and functional safety.
The MC9S12XEG128MAL belongs to NXP's legacy HCS12X automotive MCU family, designed specifically for cost-sensitive, ASIL-B-compliant powertrain and chassis control applications where deterministic real-time performance and AEC-Q100 reliability are mandatory.
FAQ
What is the maximum operating frequency of the MC9S12XEG128MAL?
The MC9S12XEG128MAL operates at a maximum system clock frequency of 50 MHz, achieved via its internal PLL locked to an external 4–8 MHz crystal. This frequency is sustained across the full AEC-Q100 Grade 2 temperature range (-40°C to +105°C), with timing parameters validated in the device's electrical characteristics table.
Does the MC9S12XEG128MAL support CAN FD?
No, the MC9S12XEG128MAL implements classic CAN 2.0B protocol only, with bit rates up to 1 Mbps. It does not support CAN FD features such as flexible data-rate, extended data length, or CRC enhancements. For CAN FD, designers should consider NXP's S32K series automotive MCUs.
How is Flash programming performed on the MC9S12XEG128MAL?
Flash programming on the MC9S12XEG128MAL is performed via the Background Debug Module (BDM) interface using a single-wire connection. The process supports in-circuit programming, erasure, and verification without removing the device from the PCB, and is compatible with standard BDM debug tools like P&E Micro's Cyclone programmers.
What debug interfaces are supported by the MC9S12XEG128MAL?
The MC9S12XEG128MAL supports only the Background Debug Module (BDM) interface - a single-wire, asynchronous serial protocol for full-chip debugging, flash programming, and real-time register inspection. It does not support JTAG or SWD; BDM requires no external debug header beyond the BKGD pin and ground connection.
Is the MC9S12XEG128MAL pin-compatible with other S12XE family members?
Yes, the MC9S12XEG128MAL in the 112-pin LQFP package shares identical pinout with other S12XE derivatives in the same package option (e.g., MC9S12XEP100MAL, MC9S12XEQ512MAL), enabling hardware reuse across memory and peripheral variants within the same footprint.
MC9S12XEG128MAL 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:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 12K 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:
MC9S12XEG128MAL FAQ
1.How can I place an order for MC9S12XEG128MAL through Aetrix?
Please submit a Request for Quotation (RFQ) for MC9S12XEG128MAL 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 MC9S12XEG128MAL reliable?
The price and inventory of MC9S12XEG128MAL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC9S12XEG128MAL is usually 5 days.
3.What payment methods are accepted for MC9S12XEG128MAL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC9S12XEG128MAL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC9S12XEG128MAL?
MC9S12XEG128MAL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC9S12XEG128MAL 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 MC9S12XEG128MAL?
For technical support, including MC9S12XEG128MAL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC9S12XEG128MAL requirements.
6.How does Aetrix verify that MC9S12XEG128MAL is sourced from the original manufacturer or authorized distributors?
All MC9S12XEG128MAL 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 MC9S12XEG128MAL meets industry standards.
7.What is the process for return or replacement of MC9S12XEG128MAL?
All MC9S12XEG128MAL units undergo pre-shipment inspection (PSI). If there is an issue with MC9S12XEG128MAL, 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 MC9S12XEG128MAL part is unused and in its original packaging.
Return procedure for MC9S12XEG128MAL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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