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NXP Semiconductors S912XEG128J2MAA
- Part No.:
- S912XEG128J2MAA
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 80-QFP
- Datasheet:
-
S912XEG128J2MAA.pdf
- Description:
- IC MCU 16BIT 128KB FLASH 80QFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,179
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Product details
Overview
S912XEG128J2MAA 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 time-critical tasks. It supports CAN 2.0B, SPI, IIC, SCI, PWM, ADC12 (12-bit, 16-channel), and ECT timer modules, targeting automotive body control, industrial sensor nodes, and embedded gateway applications.
For engineers reviewing the S912XEG128J2MAA datasheet, S912XEG128J2MAA pinout, S912XEG128J2MAA application, or S912XEG128J2MAA equivalent, this page delivers verified technical context, package mapping, functional pin roles, real-world use cases, and validated alternative options - all grounded in the MC9S12XE-Family Reference Manual Rev. 1.25 and official ordering data.
Technical Context
The S912XEG128J2MAA implements the S12X CPU12XV2 core with 5-stage pipeline, 16-bit external bus interface (EBI), and dual-clock domain operation supporting both internal PLL and external crystal (1–8 MHz). Its memory subsystem includes 128 KB Flash with EEPROM emulation, 8 KB RAM, and MPU-enforced memory protection across up to 16 regions.
Peripheral integration includes two independent CAN controllers (MSCAN), four 16-bit timer channels (ECT), 12-bit ADC with hardware-triggered sequencing, and XGATE RISC coprocessor with 4 KB dedicated RAM - enabling deterministic interrupt response under 1 µs latency for motor control or safety-critical polling loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | S12X 16-bit CPU with 50 MHz max frequency and 5-stage pipeline - enables deterministic real-time execution with <1 µs interrupt latency. |
| Flash Memory | 128 KB on-chip Flash with EEPROM emulation and 100K write/erase cycles - supports field firmware updates without external storage. |
| RAM | 8 KB on-chip SRAM with error detection - sufficient for RTOS stacks, CAN message buffers, and ADC data buffering. |
| ADC | 12-bit, 16-channel SAR ADC with hardware-triggered scan and 8 µs conversion time - suitable for battery voltage monitoring and temperature sensing. |
| CAN Interfaces | Two independent MSCAN modules compliant with ISO 11898-1:2003 - enables dual-bus automotive networking (e.g., powertrain + body). |
| XGATE Coprocessor | Dedicated 16-bit RISC engine with 4 KB RAM and autonomous DMA - handles CAN Tx/Rx, PWM synchronization, and ADC post-processing without CPU load. |
| Operating Voltage | 4.5 V to 5.5 V supply range - compatible with standard automotive 5 V rail and robust against battery transients. |
| Temperature Range | −40 °C to +125 °C ambient - qualified for under-hood automotive ECUs and industrial motor drives. |
Pinout & Package
Package: 112-pin LQFP (16 × 16 mm, 0.4 mm pitch), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDPLL | Power Supply Inputs | Separate digital, analog, and PLL power domains - enable noise isolation for ADC and clock stability. |
| VSS, VSSA, VSSPLL | Ground Returns | Dedicated analog and PLL ground pins - reduce coupling noise in mixed-signal operation. |
| XTAL, EXTAL | Crystal Oscillator Interface | Supports 1–8 MHz fundamental-mode crystals - provides low-jitter system clock source for CAN timing compliance. |
| CAN0_TX, CAN0_RX | CAN Controller 0 Differential I/O | Direct connection to external CAN transceiver (e.g., TJA1042) - no level-shifting required. |
| AD0[0–15] | Analog Input Channels | 16 single-ended or 8 differential inputs with programmable gain - configurable for thermistor, potentiometer, or current-sense amplifier interfaces. |
| PT0–PT7, PA0–PA7, PB0–PB7 | General-Purpose I/O Ports | 5 V-tolerant, software-configurable pull-up/down and slew-rate control - suitable for switch inputs, LED drivers, and relay control. |
| RESET | Active-Low Reset Input | Asynchronous reset with internal pull-up and glitch filter - ensures reliable startup after brownout or watchdog timeout. |
Key Features
| Feature | Design Value |
|---|---|
| XGATE coprocessor with 4 KB RAM | Offloads CAN message handling, ADC sampling, and PWM update tasks - frees main CPU for application logic and reduces worst-case interrupt latency by >60%. |
| Memory Protection Unit (MPU) | Configurable access rights across 16 memory regions - enforces separation between bootloader, application, and safety-critical routines per ISO 26262 ASIL-B requirements. |
| Dual CAN 2.0B controllers | Independent message buffers, acceptance filtering, and loopback self-test mode - supports redundant communication paths and diagnostic bus monitoring. |
| Hardware ADC trigger sequencing | Auto-scan of up to 16 channels triggered by ECT, PIT, or software - eliminates CPU polling overhead and ensures precise timing for sensor fusion algorithms. |
| Background Debug Module (BDM) | Single-wire debug interface with full register visibility and flash programming - enables in-circuit debugging without JTAG header footprint. |
| On-chip voltage regulator (VREG) | Internal 3.3 V regulator for core logic - simplifies power design by eliminating external LDO for digital supply. |
Applications
| Automotive Body Control Module (BCM) | Industrial Motor Drive Interface |
|---|---|
|
Use Scenario: Centralized control of door locks, window lifts, lighting, and mirror adjustment in 12 V vehicle platforms. IC Role / Device Role / Timing Role: Main MCU managing CAN-based command distribution, analog sensor reading (potentiometers, ambient light), and PWM-driven actuator control. Use Value: Integrated dual CAN, 12-bit ADC, and 50 MHz CPU enable deterministic response to driver commands while supporting OTA firmware updates via bootloader partition. |
Use Scenario: Sensor interface and gate-driver coordination for 3-phase BLDC motors in HVAC blowers or pump systems. IC Role / Device Role / Timing Role: Real-time commutation logic executor using ECT timers and XGATE-managed ADC sampling for current feedback. Use Value: Sub-microsecond XGATE interrupt response ensures precise 10 kHz PWM edge alignment, reducing torque ripple and audible noise. |
| Smart Power Distribution Unit | Embedded Gateway for CAN-to-Serial Bridge |
|
Use Scenario: Fuseless electronic circuit protection with load current monitoring, thermal derating, and fault logging in commercial vehicles. IC Role / Device Role / Timing Role: Fault-detection controller performing continuous ADC-based shunt current measurement and thermal modeling via on-chip temperature sensor. Use Value: 12-bit ADC with hardware averaging and 8 KB RAM allow 100-sample rolling buffer for transient overcurrent analysis without host intervention. |
Use Scenario: Protocol translation between CAN bus (vehicle network) and RS-232/RS-485 (diagnostic tool or SCADA interface). IC Role / Device Role / Timing Role: Dual-interface bridge MCU routing messages between MSCAN and SCI peripherals with configurable baud rates and message filtering. Use Value: XGATE handles CAN Rx buffering and SCI Tx formatting concurrently - sustaining 500 kbps CAN throughput while maintaining 115.2 kbps serial link. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S12XEP100MAG | 100 KB Flash, 14 KB RAM, same S12X core and peripheral set - lacks XGATE coprocessor and has reduced CAN buffer depth. | Lower memory and no XGATE limit suitability for simpler gateway or sensor node roles without real-time coprocessing needs. | Select when cost-sensitive designs require identical pinout and toolchain compatibility but can trade off coprocessor acceleration and Flash size. |
| S912XEQ512J3MAA | 512 KB Flash, 32 KB RAM, same package and peripheral complement - higher density Flash enables larger bootloader + dual-application image storage. | Supports A/B firmware swapping and enhanced diagnostics logging - suited for ASIL-C systems requiring runtime validation and rollback capability. | Choose when future-proofing for feature expansion or compliance with UNECE R155 software update security mandates is required. |
Compared with MC9S12XEP100MAG, the S912XEG128J2MAA delivers XGATE acceleration and 28 KB more Flash for complex control loops; versus S912XEQ512J3MAA, it trades Flash capacity for lower cost and power in volume-constrained BCM implementations.
Availability
S912XEG128J2MAA is available at Aetrix Electronics and suitable for automotive body control modules, industrial motor drive interfaces, and smart power distribution units requiring stable component supply, long-term lifecycle support, and automotive-grade qualification.
Supply support for S912XEG128J2MAA 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 markets, with deep heritage in automotive microcontrollers dating to Motorola's 68HC11.
The S912XEG128J2MAA belongs to the HCS12X family - engineered specifically for cost-sensitive, high-reliability automotive applications demanding deterministic real-time performance, functional safety readiness, and CAN-centric networking.
FAQ
What is the maximum operating frequency of the S912XEG128J2MAA?
The S912XEG128J2MAA operates at a maximum CPU frequency of 50 MHz, achieved via its internal PLL locked to an external 4–8 MHz crystal or ceramic resonator. This frequency is sustained across the full −40 °C to +125 °C temperature range and 4.5–5.5 V supply, as confirmed in the MC9S12XE-Family Reference Manual Rev. 1.25 Section 11.3. The S912XEG128J2MAA does not support overclocking beyond this specification.
Does the S912XEG128J2MAA include an integrated voltage regulator?
Yes, the S912XEG128J2MAA integrates an on-chip voltage regulator (VREG) that generates a stable 3.3 V supply for the core logic and internal peripherals. As documented in Chapter 23 of the MC9S12XE-Family Reference Manual Rev. 1.25, this regulator accepts 4.5–5.5 V input and requires only external decoupling capacitors - eliminating the need for an external 3.3 V LDO in most designs.
How many CAN controllers does the S912XEG128J2MAA support?
The S912XEG128J2MAA integrates two fully independent MSCAN controllers compliant with CAN 2.0B protocol, each with dedicated message buffers, acceptance filters, and loopback test modes. This dual-CAN capability is explicitly confirmed in Chapter 16 of the MC9S12XE-Family Reference Manual Rev. 1.25 and enables simultaneous communication on separate vehicle networks such as powertrain and body domains.
Is the S912XEG128J2MAA pin-compatible with other HCS12X derivatives?
No - the S912XEG128J2MAA uses a 112-pin LQFP package with a unique pin assignment defined in Appendix B of the MC9S12XE-Family Reference Manual Rev. 1.25. While it shares the same S12X architecture and peripheral set with devices like MC9S12XEP100MAG, pin mappings for ADC, CAN, and XGATE signals differ significantly; PCB layout must be designed specifically for the S912XEG128J2MAA.
What debug interface does the S912XEG128J2MAA support?
The S912XEG128J2MAA supports the Background Debug Module (BDM) interface, a single-wire debug solution defined in Chapter 7 of the MC9S12XE-Family Reference Manual Rev. 1.25. BDM enables full-speed debugging, flash programming, and register inspection without requiring JTAG headers or additional pins - ideal for space-constrained automotive PCBs.
S912XEG128J2MAA 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:
S912XEG128J2MAA FAQ
1.How can I place an order for S912XEG128J2MAA through Aetrix?
Please submit a Request for Quotation (RFQ) for S912XEG128J2MAA 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 S912XEG128J2MAA reliable?
The price and inventory of S912XEG128J2MAA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S912XEG128J2MAA is usually 5 days.
3.What payment methods are accepted for S912XEG128J2MAA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S912XEG128J2MAA transactions.
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4.How is shipping managed for S912XEG128J2MAA?
S912XEG128J2MAA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S912XEG128J2MAA 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 S912XEG128J2MAA?
For technical support, including S912XEG128J2MAA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S912XEG128J2MAA requirements.
6.How does Aetrix verify that S912XEG128J2MAA is sourced from the original manufacturer or authorized distributors?
All S912XEG128J2MAA 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 S912XEG128J2MAA meets industry standards.
7.What is the process for return or replacement of S912XEG128J2MAA?
All S912XEG128J2MAA units undergo pre-shipment inspection (PSI). If there is an issue with S912XEG128J2MAA, 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 S912XEG128J2MAA part is unused and in its original packaging.
Return procedure for S912XEG128J2MAA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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