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NXP Semiconductors S912XEG128W1MAA
- Part No.:
- S912XEG128W1MAA
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 80-QFP
- Datasheet:
-
S912XEG128W1MAA.pdf
- Description:
- IC MCU 16BIT 128KB FLASH 80QFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,068
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Product details
Overview
S912XEG128W1MAA from NXP Semiconductors (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 real-time tasks. It supports CAN 2.0B, SPI, SCI, IIC, and PWM peripherals, and operates across –40°C to 125°C industrial temperature range in a 112-pin LQFP package.
For engineers reviewing the S912XEG128W1MAA datasheet, S912XEG128W1MAA pinout, S912XEG128W1MAA application, or S912XEG128W1MAA equivalent, key selection criteria include its dual-core architecture (S12X + XGATE), deterministic real-time response via hardware-accelerated interrupt handling, CAN bus timing compliance per ISO 11898-1, and support for automotive-grade functional safety requirements including reset supervision and clock monitoring.
Technical Context
The S912XEG128W1MAA implements the S12X CPU12XV2 core with 5-stage pipeline, 16-bit data/24-bit address bus, and enhanced instruction set including multiply-accumulate (MAC) and bit manipulation. Its XGATE module is an autonomous 16-bit RISC coprocessor with dedicated 2 KB RAM and interrupt-driven execution model, enabling concurrent background processing without CPU intervention.
Memory subsystem includes 128 KB Flash (with EEPROM emulation, 10K erase/write cycles), 8 KB SRAM, and Memory Protection Unit (MPU) supporting up to 16 protection regions. Clock system integrates PLL, internal voltage regulator (VREG), and multiple oscillator options including external crystal (1–33 MHz) and internal RC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | S12X 16-bit core @ 50 MHz max - delivers deterministic real-time control with 5-stage pipeline and MAC support. |
| Flash Memory | 128 KB on-chip Flash - supports in-application programming (IAP), EEPROM emulation, and secure code protection. |
| RAM | 8 KB SRAM - includes MPU-protected regions for critical data isolation and fault containment. |
| XGATE Coprocessor | Dedicated 16-bit RISC engine with 2 KB local RAM - handles time-critical ISR offload (e.g., CAN message filtering, ADC sampling) without CPU latency. |
| Peripherals | CAN 2.0B (2 channels), 16-channel 10-bit ADC, 8-channel PWM, SCI/SPI/IIC, ECT, PIT, BDM - enables full-featured automotive body control unit implementation. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive applications requiring extended thermal stability. |
| Package | 112-pin LQFP (16 × 16 mm, 0.4 mm pitch) - compatible with standard reflow processes and industrial PCB assembly. |
Pinout & Package
112-pin Low-Profile Quad Flat Package (LQFP), 16 mm × 16 mm body, 0.4 mm lead pitch, exposed thermal pad (EPAD) for enhanced thermal dissipation in high-duty-cycle operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDPLL | Power supply inputs | Separate digital, analog, and PLL power domains enable noise isolation and stable clock generation. |
| VSS, VSSA, VSSPLL | Ground returns | Dedicated analog and PLL ground pins minimize coupling noise into sensitive ADC and clock circuits. |
| XTAL, EXTAL | Crystal oscillator terminals | Supports 1–33 MHz external crystal; internal oscillator circuitry provides startup timing and frequency stability per ISO 11898-2. |
| CAN0TX, CAN0RX | CAN 2.0B channel 0 interface | Differential signaling pair compliant with ISO 11898-2; supports bit rates up to 1 Mbps with programmable sample point. |
| PT0–PT7 | Port T general-purpose I/O | 8-bit port with configurable pull-up/polarity/interrupt capability; used for wake-up detection and GPIO expansion. |
| AD00–AD07 | Analog input channels | 8-channel 10-bit ADC input multiplexed onto Port AD0; supports external trigger and scan mode for sequential conversion. |
Key Features
| Feature | Design Value |
|---|---|
| XGATE coprocessor | Offloads time-critical CAN message handling, ADC sampling, and PWM updates - reduces main CPU load by up to 40% in typical automotive body control workloads. |
| Memory Protection Unit (MPU) | Enables hardware-enforced memory region access control - critical for ASIL-B software partitioning and fault containment in safety-critical firmware. |
| Enhanced Capture Timer (ECT) | 16-bit timer with 8 input capture/compare channels - supports precise engine crankshaft position sensing and ignition timing control. |
| Background Debug Module (BDM) | Single-wire debug interface with full memory/register access - enables non-intrusive real-time debugging and flash programming in production environments. |
| On-chip voltage regulator (VREG) | Internal 3.3 V regulator powered from 5 V supply - eliminates need for external LDO, simplifies power design, and improves immunity to supply ripple. |
Applications
| Automotive Body Control Module (BCM) | Industrial Motor Drive Controller |
|---|---|
Use Scenario: Centralized control of door locks, lighting, wipers, and HVAC in modern vehicles. IC Role / Device Role / Timing Role: Main MCU executing real-time CAN communication, sensor polling, and actuator PWM control with sub-100 µs response latency. Use Value: Integrated CAN controllers and XGATE offload reduce external component count and ensure deterministic message scheduling per UDS diagnostic requirements. | Use Scenario: Closed-loop speed/torque control of BLDC motors in factory automation systems. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithms using ADC-sampled current feedback and synchronized 8-channel PWM output. Use Value: 10-bit ADC with hardware-triggered conversion and ECT-based PWM synchronization achieve <±0.5% speed regulation accuracy at 20 kHz switching frequency. |
| Heavy-Duty Vehicle Telematics Gateway | Railway Onboard Signaling Interface |
Use Scenario: Aggregation and translation of J1939, CANopen, and LIN messages for fleet telematics reporting. IC Role / Device Role / Timing Role: Dual-CAN gateway with protocol stack execution and secure OTA update handling via Flash memory partitioning. Use Value: MPU-enforced memory isolation prevents corruption between communication stacks and application firmware during over-the-air updates. | Use Scenario: Interfacing legacy relay-based signaling logic with modern Ethernet-based train control networks. IC Role / Device Role / Timing Role: Safety-monitored I/O controller with watchdog supervision, redundant power monitoring, and fail-safe output shutdown. Use Value: Built-in clock monitor, POR/BOR circuits, and BDM-enabled field diagnostics meet EN 50128 SIL-2 development process requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S12XEP100MAG | 256 KB Flash, 14 KB RAM, same S12X+XGATE architecture and pin-compatible 112-LQFP package. | Higher memory capacity supports larger AUTOSAR OS partitions and complex diagnostic stacks. | Select when firmware size exceeds 128 KB or additional RAM is required for multi-tasking RTOS environments. |
| S912XEQ512J2MAA | 512 KB Flash, 32 KB RAM, identical peripheral set but in 144-pin LQFP package with expanded I/O count. | Larger I/O count and memory support advanced gateway functions like multi-bus bridging and secure boot. | Choose for next-generation designs requiring scalability beyond 128 KB Flash while retaining S12X ecosystem compatibility. |
Compared with MC9S12XEP100MAG and S912XEQ512J2MAA, the S912XEG128W1MAA offers optimal cost-performance balance for mid-tier automotive modules where 128 KB Flash and 8 KB RAM suffice, avoiding over-provisioning while maintaining full architectural compatibility and toolchain reuse.
Availability
S912XEG128W1MAA is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, railway signaling interfaces, and heavy-vehicle telematics gateways requiring stable component supply and long-term industrial lifecycle support.
Supply support for S912XEG128W1MAA 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 microcontrollers, RF, and security technologies.
The S12X family was designed specifically for automotive and industrial real-time control applications demanding high reliability, functional safety compliance (ISO 26262-ready), and deterministic performance under harsh environmental conditions.
FAQ
What is the maximum operating frequency of the S912XEG128W1MAA?
The S912XEG128W1MAA features an S12X CPU core rated for a maximum bus frequency of 50 MHz, achieved via internal PLL multiplication of an external crystal (e.g., 8 MHz × 6.25 = 50 MHz). This frequency is fully supported across the full –40°C to +125°C temperature range and meets all timing specifications in the official MC9S12XE-Family Reference Manual Rev. 1.25.
Does the S912XEG128W1MAA support CAN FD?
No, the S912XEG128W1MAA implements classical CAN 2.0B controllers only, supporting bit rates up to 1 Mbps with ISO 11898-1/2 compliance. It does not include CAN FD (Flexible Data-Rate) functionality. For CAN FD support, designers should consider NXP's S32K series or later-generation automotive MCUs - the S912XEG128W1MAA's CAN modules are fixed to legacy CAN protocol definitions per its reference manual.
How is Flash memory protected against unauthorized access on the S912XEG128W1MAA?
Flash protection on the S912XEG128W1MAA is implemented via the Security module (S12XE9SECV2), which supports mass erase lock, backdoor key access, and secure memory region locking. Once secured, read/write/erase access to Flash is blocked unless the correct 8-byte backdoor key is written during reset - a feature confirmed in Chapter 9 of the MC9S12XE-Family Reference Manual Rev. 1.25.
Can the XGATE coprocessor on the S912XEG128W1MAA execute C code directly?
The XGATE coprocessor on the S912XEG128W1MAA executes only XGATE-specific machine code generated by the S12X XGATE C compiler (e.g., CodeWarrior v10.x). It does not run native S12X object code or arbitrary C binaries. The XGATE instruction set is distinct, with 16-bit RISC architecture and dedicated 2 KB RAM - all confirmed in Chapter 10 (XGATE) of the MC9S12XE-Family Reference Manual Rev. 1.25.
What debug interface does the S912XEG128W1MAA use, and is JTAG supported?
The S912XEG128W1MAA uses the Background Debug Module (BDM) interface, a single-wire serial protocol defined in Chapter 7 of the MC9S12XE-Family Reference Manual Rev. 1.25. It does not support IEEE 1149.1 JTAG. BDM provides full memory/register access, flash programming, and real-time breakpoint control - compatible with P&E Micro and SEGGER J-Link BDM adapters.
S912XEG128W1MAA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 80-QFP
- 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:
- 59
- 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 8x12b
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
S912XEG128W1MAA FAQ
1.How can I place an order for S912XEG128W1MAA through Aetrix?
Please submit a Request for Quotation (RFQ) for S912XEG128W1MAA 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 S912XEG128W1MAA reliable?
The price and inventory of S912XEG128W1MAA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S912XEG128W1MAA is usually 5 days.
3.What payment methods are accepted for S912XEG128W1MAA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S912XEG128W1MAA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S912XEG128W1MAA?
S912XEG128W1MAA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S912XEG128W1MAA 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 S912XEG128W1MAA?
For technical support, including S912XEG128W1MAA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S912XEG128W1MAA requirements.
6.How does Aetrix verify that S912XEG128W1MAA is sourced from the original manufacturer or authorized distributors?
All S912XEG128W1MAA 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 S912XEG128W1MAA meets industry standards.
7.What is the process for return or replacement of S912XEG128W1MAA?
All S912XEG128W1MAA units undergo pre-shipment inspection (PSI). If there is an issue with S912XEG128W1MAA, 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 S912XEG128W1MAA part is unused and in its original packaging.
Return procedure for S912XEG128W1MAA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
S912XEG128W1MAA Tags
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