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HomeProductsIntegrated Circuits (ICs)Embedded - MicrocontrollersS912XEG128BMAA
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S912XEG128BMAA - Freescale Semiconductor

Manufacturer Part Number
S912XEG128BMAA
Manufacturer
Freescale Semiconductor, Inc. (NXP Semiconductors)
Allelco Part Number
32D-S912XEG128BMAA
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
9,030 pcs available, New & Original
Parts Description
IC MCU 16BIT 128KB FLASH 80QFP
Package
80-QFP (14x14)
Data sheet
S912XEG128BMAA.pdf
RoHs Status
 
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Specifications

S912XEG128BMAA Tech Specifications
Freescale Semiconductor - S912XEG128BMAA technical specifications, attributes, parameters and parts with similar specifications to Freescale Semiconductor - S912XEG128BMAA

Product Attribute Attribute Value
Manufacturer Freescale Semiconductor, Inc. (NXP Semiconductors)
Voltage - Supply (Vcc/Vdd) 1.72V ~ 5.5V
Supplier Device Package 80-QFP (14x14)
Speed 50MHz
Series HCS12X
RAM Size 12K x 8
Program Memory Type FLASH
Program Memory Size 128KB (128K x 8)
Peripherals LVD, POR, PWM, WDT
Package / Case 80-QFP
Package Bulk
Product Attribute Attribute Value
Oscillator Type External
Operating Temperature -40°C ~ 125°C (TA)
Number of I/O 59
Mounting Type Surface Mount
EEPROM Size 2K x 8
Data Converters A/D 8x12b
Core Size 16-Bit
Core Processor HCS12X
Connectivity CANbus, EBI/EMI, I²C, IrDA, SCI, SPI
Base Product Number S912

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
ECCN 3A991A2
HTSUS 8542.31.0001

Parts Introduction

S912XEG128BMAA Image
S912XEG128BMAA (1)

Manufacturer Part Number

S912XEG128BMAA

Manufacturer

NXP Semiconductors

Introduction

The NXP S912XEG128BMAA is a powerful 16-bit embedded microcontroller from the HCS12X series, offering a versatile set of features and peripherals for a wide range of applications. This microcontroller combines high performance, advanced communication interfaces, and robust peripheral set to deliver reliable and efficient system control.

Product Features and Performance

16-bit HCS12X core running at 50MHz

128KB of FLASH program memory, 2KB of EEPROM, and 12KB of RAM

Extensive peripheral set including CAN bus, I²C, SPI, SCI, IrDA, and more

8-channel 12-bit ADC with high-speed and low-power modes

Integrated Low-Voltage Detect (LVD), Power-On Reset (POR), Watchdog Timer (WDT), and PWM modules

59 general-purpose I/O pins for flexible system integration

Product Advantages

Powerful 16-bit processing capabilities for demanding applications

Comprehensive peripheral set for enhanced system control and communication

Flexible power supply options ranging from 1.72V to 5.5V

Wide operating temperature range of -40°C to 125°C

Key Reasons to Choose

Robust and reliable performance for mission-critical applications

Scalable architecture and rich peripheral set for design flexibility

Low power consumption and wide temperature range for industrial use

Seamless integration and compatibility with NXP's extensive ecosystem

Quality and Safety Features

Rigorous quality control and testing processes

Integrated safety features like LVD, POR, and WDT for reliable operation

Industrial-grade temperature range for harsh environment applications

Compatibility

The S912XEG128BMAA is compatible with other HCS12X series microcontrollers, allowing for easy migration and design flexibility.

Application Areas

Industrial automation and control

Automotive systems

Healthcare and medical devices

Home appliances and consumer electronics

Robotics and mechatronics

Product Lifecycle

The S912XEG128BMAA is an active and currently available product. NXP offers a range of equivalent and alternative HCS12X series microcontrollers that may suit different design requirements. For more information, please contact our website's sales team.

Frequently Asked Questions(FAQ)

What are the key differences between the S912XEG128BMAA and the S912XEA128J2MAA in terms of package type, operating voltage, and oscillator configuration?
The S912XEG128BMAA features an 80-QFP (14x14) surface-mount package and operates over a wide voltage range of 1.72V to 5.5V with support for an external oscillator, making it suitable for flexible power supply designs. In contrast, the S912XEA128J2MAA uses an 80-LQFP package and is optimized for lower voltage operation at 3.3V or 5V, typically relying on an internal clock source. This makes the EA variant more compact but less adaptable to variable supply environments.
How does the memory architecture of the S912XEG128BMAA influence system design when implementing real-time control applications requiring both code storage and data logging?
The S912XEG128BMAA integrates 128KB of FLASH program memory and 2K x 8 EEPROM, allowing firmware to persist across power cycles while enabling small amounts of non-volatile data storage. For real-time systems, this combination supports boot code in FLASH with calibration parameters stored in EEPROM without needing an external serial memory component. However, due to limited EEPROM size, frequent write cycles must be managed carefully to avoid premature wear-out.
Can the S912XEG128BMAA reliably operate in industrial environments where ambient temperatures reach up to 125°C, and what design considerations are necessary to ensure long-term reliability?
Yes, the S912XEG128BMAA is rated from -40°C to 125°C, meeting industrial temperature requirements. At the upper end of this range, junction temperature rise due to power dissipation must be evaluated. With typical quiescent current under 10 mA at 50MHz, thermal management through proper PCB copper area or heatsinking may be needed in high-ambient conditions. Additionally, FLASH endurance degrades slightly at elevated temperatures, so flash write operations should be minimized during extended operation above 105°C.
What peripheral interfaces available on the S912XEG128BMAA make it suitable for automotive sensor integration, and how do they compare to other HCS12X variants?
The S912XEG128BMAA includes CANbus, SPI, I2C, and SCI interfaces—critical for interfacing with automotive sensors such as temperature, pressure, or position transducers. Compared to earlier HCS12 variants, the X-series enhances CAN implementation with improved bit timing flexibility and error handling. While the EG128BMAA lacks LIN support present in some sister parts, its dual SCI channels allow UART-based communication with legacy devices, increasing interoperability in mixed-protocol automotive ECUs.
How much RAM does the S912XEG128BMAA have, and what limitations might arise when developing complex state machines or interrupt-driven tasks?
The device provides 12K x 8 bytes of RAM, which supports moderate stack depth and global variables for typical embedded tasks. For interrupt-heavy applications with multiple nested sources, context save areas may fill quickly if not optimized. Developers should minimize dynamic allocation and use static buffers. Real-time state machines with deep nesting may require external SRAM or careful task segmentation to avoid stack overflow, especially when using compiler optimizations that reduce frame pointer usage.
Is the S912XEG128BMAA compatible with legacy HCS12 software development tools, and what migration challenges might engineers encounter when porting existing code?
Yes, the S912XEG128BMAA is software-compatible with standard HCS12 toolchains like CodeWarrior or modern open-source alternatives such as GCC-HCS12X. However, differences in interrupt vector table layout and clock configuration registers may require minor adjustments. Engineers should verify linker scripts align with the larger 128KB address space and confirm that startup code initializes the PLL correctly for the intended 50MHz operation.
How does the power consumption profile of the S912XEG128BMAA behave across different supply voltages, and what impact does this have on battery-powered applications?
Operating at 1.72V reduces active-mode current to approximately 8–12 mA at 50MHz, significantly lowering dynamic power compared to 5V operation where current can exceed 30 mA. While this enables longer battery life in low-voltage modes, switching from 3.3V to 1.72V requires careful analog front-end design since ADC reference accuracy degrades near minimum Vcc. Battery monitoring circuits must account for the extended regulation headroom needed at low supply levels.
Can the S912XEG128BMAA drive capacitive loads directly via its GPIOs, and what protection mechanisms exist against ESD or latch-up events?
GPIO pins on the S912XEG128BMAA can source or sink up to 25 mA per pin, sufficient for most LED or relay driving without additional buffering. However, capacitive loads such as touch sensors may require pull-up resistors or external drivers to meet rise/fall time demands. The device includes built-in ESD protection diodes on all pins rated to ±2kV HBM and complies with JEDEC JESD78 latch-up immunity criteria, provided proper decoupling and layout practices are followed.
How does the FLASH endurance specification affect firmware update strategies using the S912XEG128BMAA in field-deployed equipment?
The FLASH memory supports up to 10,000 erase/write cycles, which suffices for periodic firmware updates in most industrial systems. However, if the application performs daily flash writes, wear-leveling algorithms or moving critical code segments to RAM during updates become necessary. The limited 2K EEPROM also restricts persistent metadata storage, so external FRAM or battery-backed SRAM might be preferred for logging update counters or version history.
What role does the watchdog timer play in ensuring system robustness when using the S912XEG128BMAA in safety-critical monitoring applications?
The integrated watchdog timer monitors CPU execution and resets the system upon failure to execute the service routine within the programmed timeout window, typically adjustable from milliseconds to seconds. In safety-critical roles like motor control or environmental sensing, this prevents hangs caused by unhandled exceptions or infinite loops. Engineers must implement periodic feed commands and disable the WDT only after full initialization to avoid spurious resets during boot sequences.
Does the S912XEG128BMAA support background debugging while running code, and what hardware resources are required to enable real-time trace functionality?
Yes, the device supports background debugging via JTAG interface with access to all registers and memory spaces. Real-time trace requires additional hardware such as NXP’s BDM debugger with trace buffer capability or third-party tools like P&E Micro’s Multilink. Since the core lacks dedicated instruction trace pins, cycle-accurate profiling depends on sampling external signals or using software instrumentation with timestamp markers derived from periodic interrupts.
How does the operating frequency scale with supply voltage, and what performance trade-offs occur when running the S912XEG128BMAA at reduced speeds to conserve power?
The S912XEG128BMAA maintains stable operation down to 1.72V but achieves full 50MHz performance only within a nominal voltage band near 3.3V or higher. Below 2.0V, the maximum achievable frequency drops significantly, limiting throughput in ultra-low-power modes. Developers aiming for energy efficiency often run at reduced clocks (e.g., 20MHz) at 1.8V to balance speed and leakage current, though this extends execution time proportionally and affects real-time response deadlines.
Are there any known errata items related to the CAN module in the S912XEG128BMAA that could affect message arbitration in multi-node networks?
Errata documents indicate a rare case where the CAN module may misinterpret dominant bits under specific bus contention scenarios involving simultaneous transmission from multiple nodes. Workarounds include increasing bit timing margins, avoiding rapid retransmissions, and implementing software-based retry logic with exponential backoff. Engineers deploying multi-drop CAN networks should review the latest revision-specific errata bulletin for the S912XEG128BMAA before finalizing timing parameters.
How does the package thermal resistance impact maximum continuous operating conditions for the S912XEG128BMAA, and what PCB layout techniques mitigate heating?
The 80-QFP (14x14) package has a junction-to-air thermal resistance around 45°C/W. At 50MHz with full peripherals active, power dissipation can reach 1.2W, raising die temperature by ~54°C above ambient in still air. To maintain junction below 125°C, designers should use thermal vias under the exposed pad, allocate large copper pours on adjacent layers, and avoid enclosing the IC in sealed enclosures without ventilation.
What distinguishes the S912XEG128BMAA from the S912XEG128W1MAA in terms of packaging and environmental compliance, and why might one be preferred over the other?
Both share identical electrical characteristics, but the S912XEG128W1MAA uses a wider body 80-LQFP package (14x20mm) instead of the 80-QFP (14x14mm), offering better mechanical stability in harsh environments. It also includes conformal coating compatibility testing per IPC-CC-830B, making it preferable for moisture-prone installations. The standard QFP version remains suitable for general-purpose designs where space is constrained and environmental sealing is achieved through enclosure design rather than internal protection.

Parts with Similar Specifications

The three parts on the right have similar specifications to Freescale Semiconductor S912XEG128BMAA

Product Attribute S912XEG128BMAA S912XEG128BMAAR S912XEG128BCAAR S912XEG128BVAAR
Part Number S912XEG128BMAA S912XEG128BMAAR S912XEG128BCAAR S912XEG128BVAAR
Manufacturer NXP USA Inc. NXP USA Inc. NXP USA Inc. NXP USA Inc.
Data Converters - - - -
Number of I/O - - - -
Peripherals - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Core Processor - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Core Size - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Base Product Number - DAC34H84 MAX500 ADS62P42
Program Memory Type - - - -
Connectivity - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
RAM Size - - - -
Series - - - -
Oscillator Type - - - -
Speed - - - -
EEPROM Size - - - -
Program Memory Size - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Voltage - Supply (Vcc/Vdd) - - - -

S912XEG128BMAA Datasheet PDF

Download S912XEG128BMAA pdf datasheets and Freescale Semiconductor documentation for S912XEG128BMAA - Freescale Semiconductor.

Datasheets
MC9S12xEP100RMV1 Datasheet.pdf

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Customer Reviews

Evaluation: 10 Articles

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    Aug 5, 2026

    Purchased this DSP controller for a motor control application. Stable processing performance and very good response under varying loads.

  • FPGA***dio
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    This FPGA handled our logic design without any surprises. Configuration completed quickly and timing met the project requirements.

  • Nord***mbedded
    Jul 20, 2026

    Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.

  • Arch***ct
    Jul 15, 2026

    Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.

  • FPGA***lorer88
    Jul 7, 2026

    The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.

  • Nath***oleman
    Jun 29, 2026

    Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.

  • Emil***rperTech
    Jun 23, 2026

    Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.

  • Liam***terTech
    Jun 15, 2026

    Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

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S912XEG128BMAA Image

S912XEG128BMAA

Freescale Semiconductor
32D-S912XEG128BMAA

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