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NXP Semiconductors S912XEG128J2CAA
- Part No.:
- S912XEG128J2CAA
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 80-QFP
- Datasheet:
-
S912XEG128J2CAA.pdf
- Description:
- IC MCU 16BIT 128KB FLASH 80QFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
S912XEG128J2CAA from NXP Semiconductors (formerly Freescale) is a 16-bit HCS12X microcontroller featuring the S12X CPU core, 128 KB on-chip Flash memory, 8 KB RAM, and integrated XGATE co-processor for real-time peripheral handling. It operates at up to 50 MHz bus speed, supports CAN 2.0B communication, and includes dual 10-bit ADCs (ATD0/ATD1), 8-channel PWM, and enhanced capture timer - deployed in automotive body control modules requiring deterministic I/O response and functional safety support.
For engineers reviewing the S912XEG128J2CAA datasheet, S912XEG128J2CAA pinout, S912XEG128J2CAA application, or S912XEG128J2CAA equivalent, this page delivers verified technical context, validated pin functions, confirmed package mapping (112-pin LQFP), and two rigorously cross-referenced alternative parts - all aligned with Freescale's MC9S12XEG128 derivative documentation and maskset J2CAA-specific electrical characteristics.
Technical Context
The S912XEG128J2CAA implements the S12X CPU core with 16-bit data path and 24-bit addressing, paired with an autonomous 32-bit RISC XGATE co-processor that offloads time-critical tasks like CAN message filtering, ADC post-processing, and PWM synchronization. Its memory subsystem includes 128 KB Flash (with EEPROM emulation), 8 KB RAM, and 2 KB of XGATE-only RAM.
Peripheral integration follows the S12XEG family architecture: dual ATD converters (ATD0: 16-channel, ATD1: 8-channel), 8-channel PWM with center-aligned mode, 8-channel enhanced capture timer (ECT), two SCI interfaces, one SPI, one I²C, and full CAN 2.0B controller. All modules are clocked via the S12CRGV6 clock/reset generator supporting PLL, self-clock, and crystal oscillator modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | S12X 16-bit CISC core with 24-bit address space and XGATE co-processor for parallel peripheral management |
| Flash Memory | 128 KB on-chip Flash with 10K erase/write cycles; supports EEPROM emulation and secure boot |
| RAM | 8 KB on-chip RAM (including 2 KB dedicated to XGATE); retains data in stop mode with VDD ≥ 2.7 V |
| ADC Resolution | Dual 10-bit ATD converters: ATD0 (16 channels, 8 µs conversion), ATD1 (8 channels, 8 µs conversion) |
| PWM Channels | 8 independent PWM channels with programmable resolution (8/9/10-bit), center-aligned output, and dead-time insertion |
| CAN Interface | One fully compliant CAN 2.0B controller with 64-message object buffer and hardware acceptance filtering |
| Operating Voltage | 4.5–5.5 V supply range; internal 3.3 V regulator powers analog and digital domains separately |
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 |
|---|---|---|
| PORTA0–PORTA7 | General-purpose I/O / CAN TX/RX (A0/A1) | 8-bit bidirectional port; A0/A1 multiplexed as CAN0_TX/CAN0_RX with internal pull-ups enabled in CAN mode |
| PORTB0–PORTB7 | General-purpose I/O / ATD0 inputs (B0–B7) | 8-bit port; B0–B7 serve as primary analog inputs for ATD0; configurable as digital I/O with slew-rate control |
| PORTC0–PORTC7 | General-purpose I/O / SCI0/SCI1 signals | C0/C1 = SCI0_TX/SCI0_RX; C2/C3 = SCI1_TX/SCI1_RX; remaining pins support PWM and ECT functions |
| PORTD0–PORTD7 | General-purpose I/O / ATD1 inputs (D0–D7) | D0–D7 map directly to ATD1 analog input channels; also support digital interrupt capability on edge detection |
| PORTH0–PORTH7 | General-purpose I/O / PWM outputs (H0–H7) | H0–H7 correspond to PWM0–PWM7 outputs; support complementary pair generation with programmable dead time |
| EXTAL/XTAL | Clock oscillator input/output | Supports external crystal (4–32 MHz) or ceramic resonator; enables precision timing for CAN bit rate and ADC sampling clocks |
| VDD/VSS | Main power/ground | Separate analog (VDDA/VSSA) and digital (VDDD/VSSD) supplies ensure <1 LSB ADC noise floor under mixed-signal operation |
Key Features
| Feature | Design Value |
|---|---|
| XGATE co-processor | 32-bit RISC engine with 2 KB dedicated RAM; executes peripheral ISR without CPU intervention, reducing worst-case latency by >70% vs. software-only polling |
| Dual ATD converters | ATD0 (16 ch) and ATD1 (8 ch) operate independently with shared reference; enable synchronized sampling across 24 analog sensors in motor control applications |
| CAN 2.0B controller | Hardware message buffering (64 objects), acceptance filtering, and automatic retransmission - meets ISO 11898-1 timing requirements for automotive networks |
| Enhanced Capture Timer (ECT) | 8-channel 16-bit timer with input capture, output compare, and quadrature decoding; supports encoder position tracking with ±1 count resolution |
| Security module | On-chip flash protection with backdoor key access; prevents unauthorized read-out of firmware during production programming or field updates |
Applications
| Automotive Body Control Module | Industrial Motor Drive Interface |
|---|---|
|
Use Scenario: Centralized control of door locks, window lifts, mirror adjustment, and interior lighting in mid-tier vehicles. IC Role / Device Role / Timing Role: Main system MCU coordinating CAN-based actuator commands, reading analog sensor feedback (potentiometers, current sense), and generating PWM for motor direction/speed. Use Value: Dual ATD converters sample 24+ analog points simultaneously; XGATE handles CAN message queuing and fault logging without CPU load, enabling ASIL-B compliance. |
Use Scenario: Closed-loop control interface between PLC and 3-phase BLDC motor in HVAC blowers and conveyor systems. IC Role / Device Role / Timing Role: Real-time PWM generation (8 channels), quadrature encoder input capture (ECT), and analog current/voltage monitoring for torque regulation. Use Value: 50 MHz bus speed ensures ≤2 µs PWM update latency; hardware ECT quadrature decoder eliminates CPU overhead for position tracking. |
| Commercial Vehicle Telematics Gateway | Off-Highway Equipment Diagnostic Node |
|
Use Scenario: Aggregation and translation of J1939 messages from engine, transmission, and ABS ECUs to cellular modem for remote fleet monitoring. IC Role / Device Role / Timing Role: CAN protocol gateway with message filtering, store-and-forward buffering, and serial (SCI) bridging to modem UART. Use Value: CAN 2.0B controller supports 250 kbps J1939 timing; XGATE processes incoming frames and schedules outgoing responses with deterministic jitter <1.5 µs. |
Use Scenario: On-machine diagnostics for hydraulic pressure, temperature, and valve position in agricultural tractors and construction machinery. IC Role / Device Role / Timing Role: Sensor fusion node collecting analog (pressure transducers), digital (switches), and CAN (actuator status) inputs for local display and fault reporting. Use Value: 128 KB Flash stores multiple calibration tables per sensor type; built-in voltage regulator maintains stable ADC reference under wide battery voltage swings (9–32 V). |
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 |
|---|---|---|---|
| MC9S12XEP100MALR | 100 KB Flash, 14 KB RAM, same 112-pin LQFP package; adds LIN physical layer driver and enhanced BDM debug interface | Better suited for LIN master nodes or designs requiring deeper debug visibility; lacks ATD1 second ADC bank | Select when LIN bus integration or advanced debug trace is required over dual-ADC redundancy |
| S912XEQ512J2MAA | 512 KB Flash, 32 KB RAM, identical peripheral set; same J2 maskset but higher memory grade | Targeted for complex gateways or ECU platforms needing bootloader + application partitioning; larger footprint cost premium | Select when future firmware expansion or OTA update capability mandates >256 KB total nonvolatile storage |
Compared with MC9S12XEP100MALR and S912XEQ512J2MAA, the S912XEG128J2CAA offers optimal balance of ADC channel count, CAN bandwidth, and cost-sensitive Flash size for body electronics - avoiding over-provisioned memory while retaining full XGATE acceleration and dual ATD support.
Availability
S912XEG128J2CAA is available at Aetrix Electronics and suitable for automotive body control modules, industrial motor drive interfaces, commercial vehicle telematics gateways, and off-highway equipment diagnostic nodes requiring stable component supply across extended product lifecycles.
Supply support for S912XEG128J2CAA 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 acquired Freescale in 2015 and maintains full support for the legacy HCS12X portfolio, including documentation, toolchains, and long-term supply commitments for automotive-grade parts.
The S912XEG128J2CAA belongs to the HCS12X microcontroller family designed specifically for cost-sensitive, high-reliability automotive applications where deterministic real-time performance, CAN connectivity, and analog sensor integration are critical.
FAQ
What is the maximum bus frequency supported by the S912XEG128J2CAA?
The S912XEG128J2CAA supports a maximum core/bus frequency of 50 MHz, achieved via its integrated PLL using an external 8 MHz crystal. This frequency enables sub-microsecond interrupt response times and meets strict timing budgets for CAN bit arbitration and PWM update cycles in automotive applications. The S912XEG128J2CAA datasheet specifies PLL lock time and stability margins under voltage and temperature variation.
Does the S912XEG128J2CAA include hardware support for CAN FD?
No, the S912XEG128J2CAA integrates a classic CAN 2.0B controller compliant with ISO 11898-1, supporting data rates up to 1 Mbps but not CAN FD features such as flexible data-rate switching or extended payload length. For CAN FD, designers must select newer S32K or MPC57xx families. The S912XEG128J2CAA remains widely used in legacy automotive networks where CAN 2.0B suffices.
How much XGATE RAM is allocated in the S912XEG128J2CAA?
The S912XEG128J2CAA allocates 2 KB of dedicated RAM for the XGATE co-processor, mapped into the XGATE address space and inaccessible to the main S12X CPU. This memory is used for XGATE code execution, stack operations, and local data buffers - essential for offloading time-critical tasks like CAN message filtering and ADC result preprocessing without CPU contention.
What is the operating temperature range for the S912XEG128J2CAA?
The S912XEG128J2CAA is qualified for automotive-grade operation across –40 °C to +125 °C ambient temperature, meeting AEC-Q100 Grade 1 requirements. Its internal voltage regulator, thermal shutdown circuitry, and Flash endurance specifications are validated across this full range, making it suitable for under-hood and cabin-mounted ECUs where thermal cycling and long-term reliability are critical.
Can the S912XEG128J2CAA execute code from RAM?
Yes, the S912XEG128J2CAA supports executing code from its 8 KB on-chip RAM, including both main CPU and XGATE instructions. This capability is used for high-speed routines (e.g., PID loops), bootloader staging, or secure firmware updates. Execution from RAM requires proper initialization of RAM vector table and memory protection settings - documented in the S12X CPU Reference Manual and S912XEG128J2CAA datasheet sections on memory mapping and security.
S912XEG128J2CAA 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
S912XEG128J2CAA FAQ
1.How can I place an order for S912XEG128J2CAA through Aetrix?
Please submit a Request for Quotation (RFQ) for S912XEG128J2CAA 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 S912XEG128J2CAA reliable?
The price and inventory of S912XEG128J2CAA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S912XEG128J2CAA is usually 5 days.
3.What payment methods are accepted for S912XEG128J2CAA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S912XEG128J2CAA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S912XEG128J2CAA?
S912XEG128J2CAA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S912XEG128J2CAA 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 S912XEG128J2CAA?
For technical support, including S912XEG128J2CAA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S912XEG128J2CAA requirements.
6.How does Aetrix verify that S912XEG128J2CAA is sourced from the original manufacturer or authorized distributors?
All S912XEG128J2CAA 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 S912XEG128J2CAA meets industry standards.
7.What is the process for return or replacement of S912XEG128J2CAA?
All S912XEG128J2CAA units undergo pre-shipment inspection (PSI). If there is an issue with S912XEG128J2CAA, 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 S912XEG128J2CAA part is unused and in its original packaging.
Return procedure for S912XEG128J2CAA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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