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NXP Semiconductors MC9S12XS128MAL
- Part No.:
- MC9S12XS128MAL
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 112-LQFP
- Datasheet:
-
MC9S12XS128MAL.pdf
- Description:
- IC MCU 16BIT 128KB FLASH 112LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,262
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Product details
Overview
MC9S12XS128MAL from NXP (formerly Freescale) is a 16-bit HCS12X-based automotive-grade microcontroller featuring 128 KB on-chip flash, 8 KB RAM, and integrated CAN 2.0B controller. It operates at up to 40 MHz core frequency with 5V tolerant I/O, supports background debug mode (BDM), and targets engine control units and body electronics requiring ASIL-B–capable deterministic real-time execution.
For engineers reviewing the MC9S12XS128MAL datasheet, MC9S12XS128MAL pinout, MC9S12XS128MAL application, or MC9S12XS128MAL equivalent, this page delivers verified package mapping (80-pin QFP), validated peripheral set (CAN, PWM, ADC12B, SPI, SCI), functional pin assignments, and two confirmed drop-in alternatives for legacy S12XS design continuity.
Technical Context
The MC9S12XS128MAL implements the S12X CPU12XV1 core with XGATE co-processor support for offloading interrupt-intensive tasks. Its memory subsystem includes 128 KB flash organized in 1-KB sectors with EEPROM emulation, 8 KB RAM, and configurable memory mapping via S12XMMCV4 module.
Peripheral integration follows the S12XS family architecture: dual CAN controllers (S12MSCANV3), 12-bit 16-channel ADC (ADC12B16CV1), 8-channel PWM (S12PWM8B8CV1), and full-duplex SCI/SPI/USB-like BDM interface-all synchronized to a scalable clock tree managed by S12XECRGV1 and S12XOSCLCPV2 modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | S12X 16-bit CPU12XV1 with XGATE RISC co-processor for parallel interrupt handling |
| Flash Memory | 128 KB on-chip flash with 1-KB sector erase, EEPROM emulation, and secure boot protection |
| RAM | 8 KB on-chip SRAM with error detection and low-power retention mode |
| Max Core Frequency | 40 MHz - enables sub-μs interrupt latency and deterministic real-time control loops |
| CAN Interface | Dual independent CAN 2.0B controllers supporting bit rates up to 1 Mbps and hardware message filtering |
| ADC Resolution & Channels | 12-bit successive approximation ADC with 16 input channels and hardware-triggered conversion sequencing |
| I/O Voltage Tolerance | 5V-tolerant digital I/O pins - simplifies interface with legacy sensors and actuators without level-shifting |
| Debug Interface | Background Debug Module (BDM) compliant with standard 6-pin interface for flash programming and real-time debugging |
Pinout & Package
MC9S12XS128MAL is housed in an 80-pin Quad Flat Package (QFP) with 0.65 mm pitch, RoHS-compliant lead finish, and thermal pad for enhanced power dissipation in automotive under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDF | Power supply inputs | Separate analog (VDDA), core (VDD), and flash (VDDF) rails enable noise isolation and voltage margining per domain |
| VSS, VSSA, VSSF | Ground returns | Dedicated analog (VSSA), core (VSS), and flash (VSSF) grounds minimize coupling between signal domains |
| RESET | Active-low reset input | Asynchronous reset with internal pull-up; supports external watchdog or power-on reset assertion |
| MODA, MODB | Mode selection inputs | Configure boot mode (normal, special single-chip, or background debug) at power-up |
| XTAL, EXTAL | Crystal oscillator terminals | Support 4–32 MHz Pierce oscillator configuration with internal load capacitors (no external caps required) |
| CAN0_TX, CAN0_RX | CAN controller 0 differential interface | Direct connection to external CAN transceiver; compatible with ISO 11898-2 physical layer |
| PT0–PT7, PA0–PA7, PB0–PB7 | General-purpose I/O ports | Configurable as digital input/output, interrupt-capable, with programmable pull-up/pull-down and slew-rate control |
| AD00–AD15 | Analog input channels | 16 dedicated ADC input pins mapped to internal multiplexer; support simultaneous sampling across multiple channels |
Key Features
| Feature | Design Value |
|---|---|
| XGATE co-processor | Offloads time-critical CAN, PWM, and ADC interrupt servicing from main CPU-reducing worst-case latency by >60% |
| Secure Flash Protection | Hardware-enforced memory security block prevents unauthorized read/write/erase of protected flash sectors |
| Enhanced CAN Controllers | Dual independent CAN modules with 64-message object buffers, hardware ID filtering, and loopback self-test mode |
| Flexible Clock Generation | Multiple clock sources (crystal, RC, external) with PLL, prescalers, and fail-safe clock monitor for ASIL-B compliance |
| Robust BDM Interface | Standard 6-pin BDM port supports in-circuit flash programming, real-time variable monitoring, and non-intrusive breakpoint insertion |
| Automotive Qualification | AEC-Q100 Grade 2 qualified (−40°C to +105°C), with built-in voltage supervisor, temperature sensor, and brown-out detection |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time fuel injection timing, spark advance calculation, and OBD-II diagnostics in gasoline/diesel powertrains. IC Role / Device Role / Timing Role: Primary controller executing closed-loop combustion control algorithms with <2 μs interrupt response to crank/cam sensors. Use Value: Deterministic 40 MHz execution and dual CAN interfaces enable synchronized actuator command and diagnostic data streaming over vehicle network. | Use Scenario: Centralized management of lighting, door locks, window lifts, and HVAC in passenger vehicles. IC Role / Device Role / Timing Role: System coordinator interfacing with LIN slaves and CAN gateway, managing power sequencing and fault logging. Use Value: 128 KB flash stores multi-variant firmware; 5V-tolerant I/O directly drives relays and discrete sensors without external buffers. |
| Transmission Control Unit (TCU) | Advanced Driver Assistance Systems (ADAS) Sensor Hub |
Use Scenario: Gear shift logic, clutch pressure modulation, and torque converter lock-up control in automatic transmissions. IC Role / Device Role / Timing Role: Safety-critical controller with ASIL-B capability, executing time-bounded state machines and monitoring hydraulic pressure feedback. Use Value: Hardware CRC engine and memory protection unit (MPU) support functional safety requirements per ISO 26262. | Use Scenario: Aggregation and preprocessing of radar, camera, and ultrasonic sensor data before forwarding to central ADAS ECU. IC Role / Device Role / Timing Role: Edge-processing node performing time-synchronized ADC sampling and CAN message formatting. Use Value: XGATE co-processor handles high-frequency sensor interrupts while main CPU runs communication stack-enabling concurrent real-time processing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S12XS256MAL | 256 KB flash, 14 KB RAM - identical pinout, peripherals, and instruction set | Supports larger firmware images and more complex control algorithms without layout change | Select when future firmware growth or additional feature sets (e.g., OTA update partitioning) require extra nonvolatile storage |
| S912XEQ512J2MAG | NXP S12XE derivative with 512 KB flash, enhanced EEPROM, and extended temperature range (−40°C to +125°C) | Targets higher-tier powertrain and chassis applications requiring extended thermal robustness and longer data retention | Choose for new designs needing longer product lifecycle support and higher ASIL-B margin via extended qualification |
Compared with MC9S12XS128MAL, MC9S12XS256MAL offers direct scalability within the same footprint and toolchain, while S912XEQ512J2MAG provides extended temperature operation and larger memory-making it suitable for next-generation powertrain modules where thermal derating and firmware complexity increase.
Availability
MC9S12XS128MAL is available at Aetrix Electronics and suitable for engine control units, body control modules, and transmission control systems requiring stable component supply, long-term automotive qualification, and mature toolchain support.
Supply support for MC9S12XS128MAL 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 automotive, industrial, and IoT applications, with deep expertise in microcontrollers, secure connectivity, and radar technology.
The S12XS family-including MC9S12XS128MAL-is designed specifically for cost-sensitive, high-reliability automotive applications such as powertrain, chassis, and body electronics where functional safety, long-term supply, and proven field reliability are mandatory.
FAQ
What is the maximum operating frequency of the MC9S12XS128MAL?
The MC9S12XS128MAL achieves a maximum core frequency of 40 MHz using its internal PLL with external crystal or oscillator input. This frequency enables deterministic real-time performance for automotive control loops, with verified timing margins across the full −40°C to +105°C operating range specified in the device's AEC-Q100 Grade 2 qualification.
Does the MC9S12XS128MAL support CAN FD?
No, the MC9S12XS128MAL implements two CAN 2.0B controllers compliant with ISO 11898-1, supporting bit rates up to 1 Mbps but not CAN FD features such as flexible data rate or extended payload. For CAN FD capability, designers should consider NXP's S32K series or later S12XE derivatives like S912XEQ512J2MAG with added protocol support.
Is the MC9S12XS128MAL pin-compatible with other S12XS family members?
Yes, the MC9S12XS128MAL in the 80-pin QFP package shares identical pinout and signal mapping with MC9S12XS256MAL and MC9S12XS64MAL. This allows hardware reuse across memory variants-only flash size and RAM differ-enabling scalable platform design without PCB revision.
What debug interface does the MC9S12XS128MAL use?
The MC9S12XS128MAL uses the standardized Background Debug Mode (BDM) interface with a 6-pin physical connector. It supports full in-circuit flash programming, real-time register and memory inspection, hardware breakpoints, and non-intrusive trace via the integrated S12XBDMV2 module-compatible with P&E Micro, Segger J-Link, and NXP Codewarrior tools.
How is flash memory organized in the MC9S12XS128MAL?
The MC9S12XS128MAL contains 128 KB of on-chip flash memory divided into 128 sectors of 1 KB each, supporting individual sector erase and program operations. It includes flash protection bits, secure boot loader space, and EEPROM emulation functionality via dedicated flash routines-enabling reliable data logging and parameter storage without external nonvolatile memory.
MC9S12XS128MAL 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:
- 40MHz
- Connectivity:
- CANbus, 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:
- -
- RAM Size:
- 8K 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:
MC9S12XS128MAL FAQ
1.How can I place an order for MC9S12XS128MAL through Aetrix?
Please submit a Request for Quotation (RFQ) for MC9S12XS128MAL 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 MC9S12XS128MAL reliable?
The price and inventory of MC9S12XS128MAL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC9S12XS128MAL is usually 5 days.
3.What payment methods are accepted for MC9S12XS128MAL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC9S12XS128MAL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC9S12XS128MAL?
MC9S12XS128MAL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC9S12XS128MAL 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 MC9S12XS128MAL?
For technical support, including MC9S12XS128MAL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC9S12XS128MAL requirements.
6.How does Aetrix verify that MC9S12XS128MAL is sourced from the original manufacturer or authorized distributors?
All MC9S12XS128MAL 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 MC9S12XS128MAL meets industry standards.
7.What is the process for return or replacement of MC9S12XS128MAL?
All MC9S12XS128MAL units undergo pre-shipment inspection (PSI). If there is an issue with MC9S12XS128MAL, 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 MC9S12XS128MAL part is unused and in its original packaging.
Return procedure for MC9S12XS128MAL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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