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NXP Semiconductors S912XEQ512ACALR
- Part No.:
- S912XEQ512ACALR
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 112-LQFP
- Datasheet:
-
S912XEQ512ACALR.pdf
- Description:
- IC MCU 16BIT 512KB FLASH 112LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,069
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Product details
Overview
S912XEQ512ACALR 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 converter. 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 S912XEQ512ACALR datasheet, S912XEQ512ACALR pinout, S912XEQ512ACALR application, or S912XEQ512ACALR equivalent, this page provides verified technical context, package mapping, real-world use cases, and validated alternative options for automotive ECU design and replacement sourcing.
Technical Context
The S912XEQ512ACALR implements a 16-bit CPU12X core with 50 MHz bus frequency and a dedicated 100 MIPS XGATE RISC co-processor running at 100 MHz. It integrates Memory Protection Unit (MPU) with eight configurable address regions and ECC-enabled Flash supporting 1-bit correction/2-bit detection.
It features four MSCAN modules (CAN0, CAN1, CAN2, CAN4), six SCI interfaces, three SPI modules, two IIC modules, and an 8-channel 10-bit ATD converter with 3 µs conversion time. The device supports non-multiplexed external bus interface only in 144-pin LQFP and 208-pin MAPBGA packages - not applicable to this 144-pin LQFP variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | CPU12X 16-bit core compatible with MC9S12 instruction set (excluding five fuzzy instructions); enables legacy code reuse with enhanced addressing. |
| Flash Memory | 512 KB Flash with ECC (64 data + 8 syndrome bits); enables single-bit fault correction and double-bit fault detection during execution. |
| RAM | 32 KB on-chip RAM; sufficient for real-time task stacks, XGATE buffers, and CAN mailbox management in multi-bus gateways. |
| Operating Voltage | 3.3 V ±5% / +10% to 5.0 V +10%; supports direct connection to automotive battery rails with minimal external regulation. |
| Temperature Range | -40°C to 125°C; qualified for under-hood automotive applications including body control modules and domain gateways. |
| Peripheral Count | 4 MSCAN, 6 SCI, 3 SPI, 2 IIC, 8-channel ATD, 8-channel PWM; enables concurrent LIN/CAN protocol handling and sensor actuator control without external logic. |
| XGATE Performance | 100 MIPS RISC co-processor; offloads CAN message filtering, LIN scheduling, and SPI data movement from main CPU to reduce latency. |
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 configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDPLL | Power Supply Inputs | Separate analog (VDDA), core (VDD), and PLL (VDDPLL) supplies enable optimized EMC filtering and noise isolation for ATD and clock circuits. |
| RESET, IRQ, XIRQ | Reset & Interrupt Inputs | Hardware reset with POR/LVD detection; maskable IRQ and non-maskable XIRQ support fail-safe system recovery and high-priority event handling. |
| PORTA–PORTP | General-Purpose I/O | Up to 119 GPIO pins across ports A–P; all inputs include hysteresis and configurable pull-up/down; outputs support programmable drive strength. |
| CAN0TX/CAN0RX–CAN4TX/CAN4RX | CAN Transceiver Interfaces | Dedicated differential signal pairs for four independent CAN controllers; each supports up to 1 Mbps bit rate and full CAN 2.0A/B compliance. |
| SCI0TX/SCI0RX–SCI5TX/SCI5RX | Serial Communication Interfaces | Six independent UART channels supporting LIN master/slave operation, bootloader communication, and diagnostic interfaces. |
| ATD0[0–7], ATD1[0–7] | Analog Input Channels | Two 8-channel ATD modules with shared 16-input multiplexer; supports simultaneous sampling and wake-up-on-compare in low-power modes. |
Key Features
| Feature | Design Value |
|---|---|
| Memory Protection Unit (MPU) | Eight configurable 8-byte-granularity address regions enforce supervisor/user mode access control and prevent unauthorized peripheral writes. |
| Enhanced XGATE Co-processor | Programmable in C; handles CAN mailbox servicing, LIN frame generation, and SPI DMA without CPU intervention - freeing main core for application logic. |
| Full-CAN with MSCAN + XGATE | Enables unlimited virtual mailboxes and hardware-accelerated message filtering; eliminates software overhead in multi-CAN gateway designs. |
| ECC-Protected Flash | 64-bit data + 8-bit syndrome ECC allows real-time correction of single-bit errors and detection of double-bit faults - critical for ASIL-B functional safety compliance. |
| API Timer in Full Stop Mode | Asynchronous periodic interrupt timer remains active down to Full Stop mode with ±10% trimmable accuracy; enables precise wake-up timing for low-power body electronics. |
Applications
| Body Control Module (BCM) | Vehicle Gateway |
|---|---|
|
Use Scenario: Centralized control of lighting, door locks, window lifts, and HVAC actuators in modern passenger vehicles. IC Role / Device Role / Timing Role: Primary MCU managing power drivers via PWM, reading analog sensors via ATD, and coordinating LIN slaves using six SCI interfaces. Use Value: Integrated 4-CAN and 6-SCI eliminate external transceivers and protocol bridges, reducing BOM cost and PCB footprint while meeting ISO 16750-2 electrical stress requirements. |
Use Scenario: Protocol translation between high-speed CAN FD backbone and low-speed LIN subnetworks in zonal architectures. IC Role / Device Role / Timing Role: Real-time gateway controller routing messages between CAN0/CAN1 (powertrain) and CAN2/CAN4 (chassis), with XGATE handling mailbox arbitration. Use Value: Hardware-accelerated CAN filtering and LIN scheduling reduce CPU load below 15%, enabling deterministic response times under 200 µs for safety-critical diagnostics. |
| Roof Module Controller | Seat Control Unit |
|
Use Scenario: Sunroof, panoramic roof, and ambient lighting control with position feedback and thermal monitoring. IC Role / Device Role / Timing Role: Sensor fusion hub aggregating Hall effect, potentiometer, and thermistor inputs via ATD, driving brushed DC motors via 8-channel PWM. Use Value: On-chip 10-bit ATD with internal oscillator enables accurate position sensing during STOP mode; API timer ensures reliable sunroof auto-reverse timeout without external RTC. |
Use Scenario: Motorized seat adjustment with memory presets, heating, and occupancy detection. IC Role / Device Role / Timing Role: Safety-aware controller executing ASIL-B compliant motor sequencing, current limiting, and EEPROM-based seat position storage. Use Value: Emulated EEPROM (EEE) with automatic D-Flash buffering ensures wear-leveling and atomic write integrity for 100,000+ seat position saves over vehicle lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| S912XEP512ACALR | Same 512 KB Flash/RAM, but adds fifth CAN module (CAN3) and increases I/O count to 152 pins; 208-pin MAPBGA only. | Required for multi-domain gateways needing five isolated CAN buses (e.g., ADAS + infotainment + chassis). | Select only if fifth CAN channel and expanded I/O are mandatory; incompatible pinout prevents drop-in replacement. |
| MC9S12XDP512MAG | Legacy S12XD family part; lacks MPU, ECC, and XGATE enhancements; same 144-pin LQFP package and peripheral count. | Suitable for cost-sensitive legacy BCM upgrades where functional safety extensions are not required. | Valid for brownfield designs with existing S12XD toolchains; does not support ASIL-B runtime error detection like S912XEQ512ACALR. |
Compared with S912XEQ512ACALR, S912XEP512ACALR offers higher integration at the cost of package incompatibility, while MC9S12XDP512MAG trades system integrity features for lower unit cost and toolchain continuity - neither is pin-compatible, requiring layout revision for migration.
Availability
S912XEQ512ACALR is available at Aetrix Electronics and suitable for automotive body control modules, vehicle gateways, roof modules, and seat control units requiring stable component supply across extended product lifecycles.
Supply support for S912XEQ512ACALR 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.
The S912XEQ512ACALR belongs to the S12XE family - engineered specifically for automotive body electronics and gateway systems demanding enhanced system integrity, functional safety readiness, and CAN/LIN protocol scalability.
FAQ
What is the maximum bus frequency supported by the S912XEQ512ACALR?
The S912XEQ512ACALR supports a maximum CPU bus frequency of 50 MHz and an XGATE bus frequency of 100 MHz. This enables deterministic real-time response for CAN message handling and sensor processing. The internal IPLL clock generator provides stable frequency multiplication without external components, and the CRG module supports spread-spectrum modulation to reduce electromagnetic emissions. These parameters are confirmed in the MC9S12XE Family Product Brief Rev. 9.
Does the S912XEQ512ACALR include Error Correction Code (ECC) for Flash memory?
Yes, the S912XEQ512ACALR includes ECC protection on its 512 KB Flash memory, using 64 data bits plus 8 syndrome bits per word to provide single-bit error correction and double-bit error detection. This capability is essential for ASIL-B compliance in automotive applications and is implemented at the silicon level - not dependent on software emulation. The ECC logic operates transparently during program/erase cycles and normal execution.
How many CAN modules are integrated into the S912XEQ512ACALR?
The S912XEQ512ACALR integrates four MSCAN modules: CAN0, CAN1, CAN2, and CAN4. This configuration is explicitly listed in Table 1 of the MC9S12XE Family Product Brief for the "9S12XEQ512" derivative in 144LQFP packaging. It does not include CAN3, which is reserved for higher-end derivatives like the S912XEP100. Each CAN module supports full CAN 2.0A/B compliance and 1 Mbps operation.
What is the role of the XGATE co-processor in the S912XEQ512ACALR?
The XGATE co-processor in the S912XEQ512ACALR is a programmable 100 MIPS RISC engine that offloads time-critical tasks from the main CPU12X core. It independently manages CAN mailbox servicing, LIN frame scheduling, SPI data transfers, and ATD result handling - reducing CPU utilization by up to 70% in gateway applications. Its interrupt-driven architecture and dual-priority levels ensure deterministic response to peripheral events without compromising application-layer timing.
Is the S912XEQ512ACALR qualified for under-hood automotive environments?
Yes, the S912XEQ512ACALR is qualified for operation from -40°C to +125°C ambient temperature, meeting AEC-Q100 Grade 1 requirements for under-hood deployment. Its separate VDDA/VDD/VDDPLL supply domains, hysteresis-equipped I/O pins, and built-in low-voltage detect (LVD) circuitry ensure robust behavior during cold cranking and thermal transients. This qualification is documented in the MC9S12XE Family Product Brief and supported by NXP's automotive reliability test reports.
S912XEQ512ACALR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 112-LQFP
- Series:
- HCS12X
- Packaging:
- Tape & Reel (TR)
- 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:
- 91
- 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 16x12b
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
S912XEQ512ACALR FAQ
1.How can I place an order for S912XEQ512ACALR through Aetrix?
Please submit a Request for Quotation (RFQ) for S912XEQ512ACALR 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 S912XEQ512ACALR reliable?
The price and inventory of S912XEQ512ACALR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S912XEQ512ACALR is usually 5 days.
3.What payment methods are accepted for S912XEQ512ACALR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S912XEQ512ACALR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S912XEQ512ACALR?
S912XEQ512ACALR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S912XEQ512ACALR 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 S912XEQ512ACALR?
For technical support, including S912XEQ512ACALR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S912XEQ512ACALR requirements.
6.How does Aetrix verify that S912XEQ512ACALR is sourced from the original manufacturer or authorized distributors?
All S912XEQ512ACALR 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 S912XEQ512ACALR meets industry standards.
7.What is the process for return or replacement of S912XEQ512ACALR?
All S912XEQ512ACALR units undergo pre-shipment inspection (PSI). If there is an issue with S912XEQ512ACALR, 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 S912XEQ512ACALR part is unused and in its original packaging.
Return procedure for S912XEQ512ACALR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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