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NXP Semiconductors MC9S12XS128MAE
- Part No.:
- MC9S12XS128MAE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
MC9S12XS128MAE.pdf
- Description:
- IC MCU 16BIT 128KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,415
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Product details
Overview
MC9S12XS128MAE 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 BDM debugging, and targets engine control units and body electronics requiring ASIL-B–capable deterministic real-time execution.
For engineers reviewing the MC9S12XS128MAE datasheet, MC9S12XS128MAE pinout, MC9S12XS128MAE application, or MC9S12XS128MAE equivalent, key selection criteria include flash size, CAN interface count, ADC resolution and channel count, BDM debug support, and 5V I/O compatibility in harsh automotive environments.
Technical Context
The MC9S12XS128MAE implements the S12X CPU core with XGATE co-processor for offloading interrupt handling and peripheral management. Its memory architecture includes paged 128 KB flash organized in 1-KB sectors, 8 KB RAM, and 1 KB EEPROM emulation via flash.
Peripheral integration includes a 10-bit 16-channel ADC, 8-channel PWM with center-aligned mode, 2× SCI, 1× SPI, 2× CAN modules (one MSCAN, one FlexCAN), 16-bit timer with input capture/output compare, and a programmable PLL supporting multiple clock sources including external crystal and internal RC oscillator.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | S12X 16-bit CPU with XGATE auxiliary processor for parallel interrupt processing |
| Flash Memory | 128 KB on-chip flash with 1-KB sector erase, 100K write/erase cycles, and EEPROM emulation |
| RAM | 8 KB on-chip SRAM with wait-state-free access at full speed |
| CAN Interfaces | Two independent CAN modules: S12MSCAN (legacy) and S12FlexCAN (enhanced message buffering) |
| ADC | 10-bit successive-approximation ADC with 16 input channels, configurable sample time, and hardware-triggered conversion |
| PWM | 8-channel 16-bit PWM with dead-time insertion, center-aligned mode, and fault protection inputs |
| Operating Voltage | 4.5 V to 5.5 V supply range, enabling direct connection to automotive battery systems without external regulators |
| Temperature Range | −40 °C to +125 °C ambient operating range, qualified per AEC-Q100 Grade 1 |
Pinout & Package
MC9S12XS128MAE is housed in an 80-pin Quad Flat Package (80QFP) with 0.5 mm pitch, thermally enhanced for automotive under-hood applications. Package dimensions are 12 mm × 12 mm × 1.4 mm (height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDPLL | Power supply inputs | Dedicated analog, digital, and PLL power rails enable noise isolation and stable clock generation |
| VSS, VSSA, VSSPLL | Ground returns | Separate analog/digital/PLL ground pins reduce coupling noise and improve ADC accuracy |
| RESET | Active-low reset input | Asynchronous reset with internal pull-up; accepts external watchdog or power-on reset signals |
| MODA, MODB | Mode configuration pins | Set boot mode (normal, special bootstrap, or background debug) at power-up |
| XTAL, EXTAL | Crystal oscillator terminals | Support 4–32 MHz fundamental-mode crystals for precise system timing and CAN bit-rate accuracy |
| CAN0TX, CAN0RX | CAN 0 differential transmitter/receiver | Direct connection to external CAN transceiver; compliant with ISO 11898-2 physical layer |
| CAN1TX, CAN1RX | CAN 1 differential transmitter/receiver | Second independent CAN bus interface for multi-bus architectures (e.g., powertrain + body networks) |
| AD0[0–15] | Analog input channels | 16 dedicated ADC input pins with programmable gain and sampling control |
Key Features
| Feature | Design Value |
|---|---|
| XGATE co-processor | Offloads up to 80% of interrupt service overhead, freeing main CPU for application logic |
| Enhanced BDM interface | Single-wire background debug with non-intrusive real-time register/memory access and flash programming |
| Hardware CRC module | Accelerates checksum calculation for flash integrity verification and firmware OTA updates |
| Programmable PLL | Generates stable 40 MHz core clock from low-frequency crystal (e.g., 8 MHz), reducing EMI vs. high-frequency oscillators |
| Secure memory protection | Flash security byte prevents unauthorized read-out; supports mass erase lock and backdoor key access |
| Low-power stop modes | Current draw < 10 µA in stop mode with wake-up via CAN, SCI, or external interrupt - critical for always-on vehicle networks |
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 engines. IC Role / Device Role / Timing Role: Primary controller executing closed-loop combustion control algorithms with sub-millisecond latency. Use Value: Dual CAN interfaces enable simultaneous communication with powertrain and diagnostic networks; 40 MHz core ensures deterministic loop execution under load. | Use Scenario: Centralized management of door locks, lighting, wipers, and HVAC in modern passenger vehicles. IC Role / Device Role / Timing Role: System coordinator interfacing with LIN slaves and relays while maintaining CAN gateway functionality. Use Value: 16-channel ADC monitors potentiometers and temperature sensors; 8-channel PWM drives LED dimming and motor control without external drivers. |
| Transmission Control Unit (TCU) | Advanced Driver Assistance Systems (ADAS) Sensor Hub |
Use Scenario: Gear shift scheduling, clutch pressure modulation, and torque converter lock-up control in automatic transmissions. IC Role / Device Role / Timing Role: Safety-critical controller implementing ASIL-B software partitions with hardware-assisted memory protection. Use Value: AEC-Q100 Grade 1 qualification and 125 °C operation ensure reliability in transmission oil-cooled enclosures. | Use Scenario: Aggregating radar, camera, and ultrasonic sensor data before forwarding to central ADAS ECU via CAN FD. IC Role / Device Role / Timing Role: Pre-processing node performing timestamp synchronization and basic sensor fusion. Use Value: XGATE co-processor handles time-critical sensor interrupts while main CPU runs lightweight filtering algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S12XS256MAE | 256 KB flash, same package and pinout; identical peripheral set and instruction set | Higher firmware storage capacity for complex control stacks or dual-application images | Select when future firmware growth or bootloader + application separation requires >128 KB flash |
| S9S12G128F0MLH | S12G core (not S12X); no XGATE; 128 KB flash; 5V-tolerant I/O retained | Lacks hardware co-processor and advanced debug features; lower interrupt throughput | Choose for cost-sensitive, non-safety-critical applications where XGATE acceleration is unnecessary |
Compared with MC9S12XS128MAE, the MC9S12XS256MAE offers scalable flash without design change, while the S9S12G128F0MLH reduces complexity and cost at the expense of real-time determinism and debug capability.
Availability
MC9S12XS128MAE is available at Aetrix Electronics and suitable for engine control units, body control modules, and transmission control units requiring stable component supply across extended automotive production lifecycles.
Supply support for MC9S12XS128MAE 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 leader in automotive microcontrollers, providing secure, reliable silicon solutions for safety-critical vehicle systems.
The S12XS family was engineered specifically for automotive powertrain and chassis control applications demanding high computational throughput, robust communication, and long-term reliability under extreme environmental conditions.
FAQ
What is the maximum operating frequency of the MC9S12XS128MAE?
The MC9S12XS128MAE achieves a maximum core clock frequency of 40 MHz using its integrated PLL. This is derived from an external crystal (e.g., 8 MHz) multiplied by 5, enabling deterministic real-time execution for automotive control loops. The bus clock runs at half-core speed (20 MHz), and all peripherals are synchronized to this domain.
Does the MC9S12XS128MAE support CAN FD?
No, the MC9S12XS128MAE does not support CAN FD. It integrates two legacy CAN 2.0B controllers: one S12MSCAN and one S12FlexCAN, both limited to classical CAN with up to 1 Mbps baud rate. CAN FD capability requires newer families such as S32K or MPC57xx.
Is the MC9S12XS128MAE pin-compatible with other S12XS family members?
Yes, the MC9S12XS128MAE in the 80QFP package shares identical pinout with MC9S12XS256MAE and MC9S12XS64MAE. This allows hardware reuse across variants differing only in flash size, simplifying PCB design and qualification for multi-tier ECU platforms.
What debug interface does the MC9S12XS128MAE use?
The MC9S12XS128MAE uses the Background Debug Mode (BDM) interface, implemented via a single-wire BKGD pin. It supports full-speed non-intrusive debugging, flash programming, and real-time memory/register inspection using standard Freescale/NXP BDM tools like P&E Multilink or SEGGER J-Link with BDM firmware.
What is the purpose of the XGATE co-processor in the MC9S12XS128MAE?
The XGATE co-processor in the MC9S12XS128MAE is an 8-bit RISC engine that handles time-critical peripheral interrupts independently of the main S12X CPU. It reduces main CPU interrupt latency by up to 80%, enabling deterministic response to CAN messages, ADC conversions, and PWM events-critical for ASIL-B automotive functions.
MC9S12XS128MAE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 64-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:
- 44
- 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 8x12b
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC9S12XS128MAE FAQ
1.How can I place an order for MC9S12XS128MAE through Aetrix?
Please submit a Request for Quotation (RFQ) for MC9S12XS128MAE 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 MC9S12XS128MAE reliable?
The price and inventory of MC9S12XS128MAE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC9S12XS128MAE is usually 5 days.
3.What payment methods are accepted for MC9S12XS128MAE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC9S12XS128MAE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC9S12XS128MAE?
MC9S12XS128MAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC9S12XS128MAE 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 MC9S12XS128MAE?
For technical support, including MC9S12XS128MAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC9S12XS128MAE requirements.
6.How does Aetrix verify that MC9S12XS128MAE is sourced from the original manufacturer or authorized distributors?
All MC9S12XS128MAE 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 MC9S12XS128MAE meets industry standards.
7.What is the process for return or replacement of MC9S12XS128MAE?
All MC9S12XS128MAE units undergo pre-shipment inspection (PSI). If there is an issue with MC9S12XS128MAE, 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 MC9S12XS128MAE part is unused and in its original packaging.
Return procedure for MC9S12XS128MAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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