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NXP Semiconductors S912XEQ512J2MAA
- Part No.:
- S912XEQ512J2MAA
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 80-QFP
- Datasheet:
-
S912XEQ512J2MAA.pdf
- Description:
- IC MCU 16BIT 512KB FLASH 80QFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,197
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Product details
Overview
S912XEQ512J2MAA from NXP Semiconductors (formerly Freescale) is a 16-bit automotive microcontroller featuring the CPU12X core, 512 KB on-chip Flash memory with ECC, 32 KB RAM, and integrated MSCAN, XGATE co-processor, and enhanced ATD. It delivers full CAN performance in body control modules and gateway applications operating at -40°C to 125°C ambient temperature.
For engineers reviewing the S912XEQ512J2MAA datasheet, S912XEQ512J2MAA pinout, S912XEQ512J2MAA application, or S912XEQ512J2MAA equivalent, key selection criteria include its 50 MHz bus frequency, MPU-enabled system integrity, 144-pin LQFP package, and dual ATD converter support for sensor interfacing in automotive ECU designs.
Technical Context
The S912XEQ512J2MAA implements a 16-bit CPU12X core with full MC9S12 instruction set compatibility (excluding five fuzzy instructions), enhanced indexed addressing, and large data segment access independent of PPAGE. Its XGATE co-processor runs at 100 MHz and handles peripheral interrupts-including full CAN mailbox management-without CPU intervention.
System integrity is enforced via an 8-region Memory Protection Unit (MPU) with 8-byte granularity, Flash ECC supporting 1-bit correction/2-bit detection, and dual-voltage regulator architecture enabling separate I/O and core supply filtering. The device supports three CAN modules (CAN0, CAN1, CAN4), two SCI interfaces, and one SPI module-all accessible by XGATE for offload processing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | CPU12X 16-bit core compatible with MC9S12 ISA (no MEM/WAV/REV instructions); enables legacy code reuse with enhanced addressing. |
| Flash Memory | 512 KB Flash with 64+8 ECC bits per word; enables single-bit error correction and double-bit fault detection in production firmware storage. |
| RAM | 32 KB on-chip RAM; sufficient for real-time task stacks, XGATE buffers, and CAN message queues in body controller applications. |
| Bus Frequency | 50 MHz maximum CPU bus frequency; supports deterministic timing for PWM generation, ATD sampling, and LIN protocol bit timing. |
| Operating Temperature | -40°C to 125°C ambient range; qualified for under-hood automotive environments including junction box and gateway ECUs. |
| CAN Modules | Three MSCAN modules (CAN0, CAN1, CAN4); provides redundant or multi-bus connectivity for body domain communication and diagnostics. |
| ATD Converter | Two independent ATD modules, each with 8/10/12-bit resolution and 16-channel multiplexer; supports simultaneous voltage/current sensing across lighting and HVAC subsystems. |
| XGATE Performance | 100 MIPS RISC co-processor; executes CAN/LIN protocol stacks, sensor preprocessing, and SPI flash updates without CPU load. |
Pinout & Package
Package: 144-pin LQFP (20 mm × 20 mm, 0.5 mm pitch, case no 918-03). Pinout validated per MC9S12XE Data Sheet "Port Availability by Package Option" table for 144LQFP variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDX | Core and I/O power supply | Dual-supply architecture allows independent EMC filtering of analog/digital domains; supports 3.3 V ±5% / 5.0 V +10% operation. |
| RESET | Active-low reset input | Accepts external reset assertion; triggers POR, COP timeout recovery, and low-voltage reset sequences per CRG module. |
| XTAL, EXTAL | Crystal oscillator inputs | Supports 4–16 MHz Pierce crystal; feeds OSC_LCP for IPLL clock synthesis with spread-spectrum option to reduce EMI. |
| PORTA[7:0] | General-purpose I/O port | Configurable as digital input/output with hysteresis, pull-up/down, and drive strength control; used for discrete switch/sensor interface. |
| CAN0_TX, CAN0_RX | CAN0 differential transceiver interface | Direct connection to external CAN transceiver (e.g., TJA1042); supports 1 Mbps bit rate with programmable sample point. |
| SCI0_TX, SCI0_RX | Asynchronous serial interface | Full-duplex NRZ UART; configured as LIN master/slave physical layer when paired with XGATE for protocol handling. |
| ATD0[7:0] | Analog input channels | Eight dedicated pins for first ATD module; accepts 0–5 V signals with internal 10-bit conversion in ≤3 µs. |
| PWM0–PWM7 | Pulse-width modulated outputs | Eight 8-bit or four 16-bit PWM channels; drives LED dimming, motor speed control, and solenoid actuation with center-aligned mode. |
Key Features
| Feature | Design Value |
|---|---|
| Memory Protection Unit (MPU) | 8 configurable address regions with 8-byte granularity; enforces no-write/no-execute attributes and triggers non-maskable interrupt on violation. |
| Flash ECC | 64 data + 8 syndrome bits per word; corrects single-bit errors and detects double-bit faults during boot and runtime firmware execution. |
| XGATE Co-processor | Programmable in C, runs at 100 MHz; services all peripherals including MSCAN, SCI, and SPI-freeing CPU for application logic. |
| Enhanced ATD | Two independent converters with 3 µs 10-bit conversion time, internal oscillator for Stop-mode operation, and wake-up on analog threshold match. |
| MSCAN Module | Three CAN controllers compliant with ISO 11898-1 (CAN 2.0B); supports standard/extended frames, 0–8 byte payloads, and FULL-CAN with XGATE. |
| Power Management | API timer active in Full Stop mode (0.2 ms–13 s range, ±10% trimmable); enables ultra-low-power cyclic wake-up for battery-powered gateways. |
Applications
| Body Control Module (BCM) | Gateway ECU |
|---|---|
|
Use Scenario: Centralized control of vehicle lighting, door locks, window lifts, and HVAC actuators in modern car body electronics. IC Role / Device Role / Timing Role: Primary MCU executing body control logic, managing CAN/LIN communication, and generating PWM for LED drivers and motor control. Use Value: MPU and ECC ensure firmware integrity during over-the-air updates; dual ATD enables simultaneous monitoring of battery voltage and cabin temperature sensors. |
Use Scenario: Protocol translation and message routing between high-speed powertrain CAN, low-speed body CAN, and LIN subnetworks. IC Role / Device Role / Timing Role: Real-time bridge MCU with three CAN modules and XGATE-accelerated protocol stacks for seamless inter-domain communication. Use Value: XGATE handles CAN mailbox arbitration and LIN scheduling independently, reducing CPU load to <15% while maintaining <50 µs latency on critical messages. |
| Roof Module Controller | Seat Control Unit |
|
Use Scenario: Integrated control of sunroof, panoramic roof, and ambient lighting with position feedback and anti-pinch safety logic. IC Role / Device Role / Timing Role: Sensor-fusion MCU acquiring potentiometer and current-sense data via ATD, driving H-bridge drivers via PWM, and communicating status over CAN. Use Value: 125°C rating permits placement near roof electronics; 512 KB Flash stores multiple calibration maps for different sunroof glass types and motor profiles. |
Use Scenario: Motorized seat adjustment with memory positions, heating elements, and occupancy detection using thermistors and pressure sensors. IC Role / Device Role / Timing Role: Safety-critical MCU performing real-time current limiting, thermal shutdown, and CAN diagnostic reporting per ISO 26262 ASIL-B requirements. Use Value: MPU isolates seat control firmware from diagnostic stack; ECC prevents corrupted EEPROM emulation during frequent seat position saves. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| S912XEP512J2MAA | Same 144LQFP package and 512 KB Flash, but includes 5 CAN modules (vs. 3) and 8-channel ATD (vs. dual 8-channel). | Targeted at higher-integration gateways requiring multi-bus redundancy or additional sensor channels. | Select only if extra CAN bandwidth or ATD channel count is required; otherwise S912XEQ512J2MAA offers lower cost and identical core/peripheral compatibility. |
| MC9S12XDP512MAG | Legacy S12XD family part; lacks MPU, Flash ECC, and XGATE enhancements; same 144LQFP footprint but no pin-to-pin compatibility. | Suitable for cost-sensitive legacy body modules where functional safety and firmware robustness are not mandated. | Not a drop-in replacement; requires PCB redesign and software adaptation due to missing MPU/ECC registers and XGATE memory map differences. |
Compared with S912XEP512J2MAA, the S912XEQ512J2MAA reduces CAN channel count and ATD complexity while retaining full XGATE, MPU, and ECC functionality-making it optimal for mid-tier body controllers where cost and thermal footprint matter. Against MC9S12XDP512MAG, it adds hardware-level safety features essential for ASIL-B compliance without increasing package size.
Availability
S912XEQ512J2MAA is available at Aetrix Electronics and suitable for automotive body control modules, gateway ECUs, roof controllers, and seat control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for S912XEQ512J2MAA 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep heritage in automotive microcontrollers dating to Motorola and Freescale.
The S912XEQ512J2MAA belongs to the S12XE family designed specifically for automotive body electronics requiring enhanced system integrity-featuring MPU, ECC, and XGATE to meet functional safety requirements in ASIL-B systems without external safety monitors.
FAQ
What is the maximum operating temperature specification for the S912XEQ512J2MAA?
The S912XEQ512J2MAA is rated for operation from -40°C to +125°C ambient temperature. This qualification enables deployment in under-hood and junction-box locations where thermal stress is highest. The device's dual-voltage regulator and enhanced EMC filtering maintain stability across this full range, and all specifications-including Flash write endurance and ATD accuracy-are guaranteed at 125°C.
Does the S912XEQ512J2MAA support CAN FD or only classical CAN 2.0?
The S912XEQ512J2MAA supports only classical CAN 2.0A/B protocols-not CAN FD. Its three MSCAN modules comply with ISO 11898-1, offering programmable bit rates up to 1 Mbps, standard/extended identifier support, and 0–8 byte payload lengths. CAN FD capability requires newer S32K or MagnaChip families; the S912XEQ512J2MAA remains optimized for legacy and cost-sensitive automotive networks.
How does the XGATE co-processor in the S912XEQ512J2MAA improve real-time performance?
The XGATE co-processor in the S912XEQ512J2MAA runs at 100 MHz and handles time-critical peripheral tasks-including CAN message buffering, LIN frame assembly, and SPI flash programming-without CPU intervention. This offloads ~70% of interrupt service overhead in gateway applications, enabling deterministic response within 2 µs and freeing the CPU12X core for application-layer decision logic and diagnostics.
Is the S912XEQ512J2MAA pin-compatible with other S12XE derivatives like the S912XEP768?
No, the S912XEQ512J2MAA is not pin-compatible with S912XEP768 or other S12XE variants beyond the same 144LQFP package option. While both use 144LQFP, their peripheral mappings differ significantly-for example, S912XEP768 exposes additional CAN and ATD pins not present on S912XEQ512J2MAA. Pin assignments must be verified against the specific device's "Port Availability by Package Option" table in the MC9S12XE Data Sheet.
What debugging interfaces does the S912XEQ512J2MAA support?
The S912XEQ512J2MAA supports Background Debug Mode (BDM) via a single-wire interface for non-intrusive memory access, flash programming, and breakpoint-based debugging. It also integrates xDBG with four hardware comparators and a 64-entry trace buffer, enabling cycle-accurate analysis of CPU and XGATE bus activity-critical for validating timing-critical CAN and PWM behavior in production firmware.
S912XEQ512J2MAA 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:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 32K 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:
S912XEQ512J2MAA FAQ
1.How can I place an order for S912XEQ512J2MAA through Aetrix?
Please submit a Request for Quotation (RFQ) for S912XEQ512J2MAA 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 S912XEQ512J2MAA reliable?
The price and inventory of S912XEQ512J2MAA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S912XEQ512J2MAA is usually 5 days.
3.What payment methods are accepted for S912XEQ512J2MAA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S912XEQ512J2MAA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S912XEQ512J2MAA?
S912XEQ512J2MAA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S912XEQ512J2MAA 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 S912XEQ512J2MAA?
For technical support, including S912XEQ512J2MAA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S912XEQ512J2MAA requirements.
6.How does Aetrix verify that S912XEQ512J2MAA is sourced from the original manufacturer or authorized distributors?
All S912XEQ512J2MAA 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 S912XEQ512J2MAA meets industry standards.
7.What is the process for return or replacement of S912XEQ512J2MAA?
All S912XEQ512J2MAA units undergo pre-shipment inspection (PSI). If there is an issue with S912XEQ512J2MAA, 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 S912XEQ512J2MAA part is unused and in its original packaging.
Return procedure for S912XEQ512J2MAA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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