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NXP Semiconductors S9S12XS256J0CAER
- Part No.:
- S9S12XS256J0CAER
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
S9S12XS256J0CAER.pdf
- Description:
- IC MCU 16BIT 256KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,663
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Product details
Overview
S9S12XS256J0CAER from NXP Semiconductors (formerly Freescale) is a 16-bit HCS12X-based automotive-grade microcontroller featuring 256 KB on-chip flash, 12 KB RAM, and integrated CAN 2.0B controller. It operates at up to 40 MHz core frequency with 5V tolerant I/O, supports BDM debugging, and targets engine control units and body electronics requiring ASIL-B capable timing and fault handling.
For engineers reviewing the S9S12XS256J0CAER datasheet, S9S12XS256J0CAER pinout, S9S12XS256J0CAER application, or S9S12XS256J0CAER equivalent, key selection criteria include its 80-pin LQFP package, 256 KB flash with EEPROM emulation, dual CAN interface, 10-bit ADC with 16 channels, and hardware BDM support for production programming and field diagnostics.
Technical Context
The S9S12XS256J0CAER implements the S12X CPU12XV1 core with XGATE co-processor acceleration for interrupt offloading. Its memory subsystem includes 256 KB flash organized in 2 KB sectors with 100K write/erase cycles, 12 KB SRAM, and 1 KB EEPROM-emulated data flash.
Peripheral integration includes two Freescale Scalable CAN modules (S12MSCAN), 16-channel 10-bit ADC (ADC12B16C), 8-channel PWM (S12PWM8B8C), SPI, SCI, and PIT timers - all clocked via the S12XE CPG module supporting multiple PLL configurations and fail-safe clock monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | HCS12X 16-bit CPU12XV1 with XGATE co-processor for deterministic ISR offload |
| Flash Memory | 256 KB on-chip flash with 2 KB sector erase, 100K endurance, and EEPROM emulation capability |
| RAM | 12 KB on-chip SRAM with retention during stop mode |
| CAN Interfaces | Dual independent S12MSCAN modules supporting CAN 2.0A/B protocol with 64-message object buffers each |
| ADC | 10-bit successive approximation ADC with 16 input channels, 8 µs conversion time, and external trigger support |
| PWM | 8-channel 16-bit PWM with center-aligned and edge-aligned modes, dead-time insertion, and fault protection |
| Operating Voltage | 4.5 V to 5.5 V supply range, with 5V-tolerant digital I/O pins for direct connection to legacy automotive harnesses |
| Temperature Range | -40°C to +125°C ambient operating range, qualified per AEC-Q100 Grade 1 for under-hood applications |
Pinout & Package
Package: 80-pin LQFP (12 mm × 12 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDPLL | Power Supply Inputs | Separate analog (VDDA), core (VDD), and PLL (VDDPLL) rails enable noise isolation for ADC and clock circuits |
| VSS, VSSA, VSSPLL | Ground Returns | Dedicated analog (VSSA), core (VSS), and PLL (VSSPLL) grounds minimize coupling between signal domains |
| RESET | Active-Low Reset Input | Asynchronous reset with internal pull-up; accepts external watchdog or power-on reset assertion |
| MODA, MODB | Mode Configuration Pins | Set boot mode (normal, special bootstrap, or BDM) at power-up; latched internally after reset release |
| PORTA[7:0] | General-Purpose I/O Port | 8-bit bidirectional port with configurable pull-up, reduced drive strength, and interrupt-on-change capability |
| CAN0_TX, CAN0_RX | CAN Controller Channel 0 Interface | Differential transmit/receive signals compatible with ISO 11898-2 transceivers for high-speed CAN bus |
| CAN1_TX, CAN1_RX | CAN Controller Channel 1 Interface | Independent second CAN channel enabling gateway or redundancy architectures without external arbitration |
| AD0[15:0] | Analog Input Channels | 16 dedicated analog inputs routed to ADC0; includes internal temperature sensor and bandgap reference |
| SCI0_TX, SCI0_RX | UART Serial Interface | Full-duplex asynchronous serial interface compliant with RS-232/RS-485 physical layer requirements |
| BKGD | Background Debug Pin | Single-wire BDM interface for non-intrusive debug, flash programming, and real-time register inspection |
Key Features
| Feature | Design Value |
|---|---|
| XGATE Co-Processor | Offloads time-critical CAN, ADC, and PWM interrupt handling from main CPU, reducing latency by up to 70% in gateway applications |
| EEPROM Emulation | Uses flash sectors to emulate EEPROM with wear-leveling and atomic write/erase, eliminating need for external serial EEPROM |
| Dual CAN Controllers | Two independent S12MSCAN modules support simultaneous CAN FD-ready networks (with external transceivers) or CAN-to-CAN bridging |
| Hardware BDM Support | On-chip BDM module enables production programming, calibration updates, and field diagnostics without JTAG header or external debugger |
| AEC-Q100 Grade 1 Qualification | Validated for automotive under-hood operation from -40°C to +125°C, including HTOL, TC, and ESD testing per ISO 10605 |
| Fail-Safe Clock Monitoring | Integrated CPG module detects oscillator failure and automatically switches to backup RC oscillator while asserting error flag for safe state entry |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time fuel injection timing, spark advance calculation, and OBD-II diagnostics in gasoline/diesel powertrains. IC Role / Device Role / Timing Role: Primary engine management MCU executing closed-loop PID control at 10 ms intervals with sub-microsecond timer resolution. Use Value: Dual CAN interfaces enable simultaneous communication with transmission and chassis ECUs; 256 KB flash accommodates complex calibration maps and diagnostic software. | Use Scenario: Centralized control of lighting, door locks, window lifts, and HVAC in premium passenger vehicles. IC Role / Device Role / Timing Role: System coordinator managing LIN slave nodes and CAN backbone traffic with deterministic response to switch events. Use Value: 16-channel ADC monitors potentiometer positions and thermistor-based cabin temperature; XGATE handles LIN frame assembly without CPU load. |
| Electric Power Steering (EPS) | Advanced Driver Assistance Systems (ADAS) Gateway |
Use Scenario: Torque assist calculation, motor phase control, and fault detection in column-assist EPS systems. IC Role / Device Role / Timing Role: Safety-critical controller implementing ASIL-B functions with lock-step monitoring and redundant PWM outputs. Use Value: Hardware PWM with dead-time insertion ensures precise three-phase inverter gate drive; 12 KB RAM supports real-time torque observer algorithms. | Use Scenario: Aggregating camera, radar, and ultrasonic sensor data across multiple CAN and LIN buses before forwarding to central ADAS domain controller. IC Role / Device Role / Timing Role: Protocol translation hub with time-synchronized message routing and priority-based arbitration. Use Value: Dual CAN controllers isolate sensor networks from actuator networks; BDM interface enables over-the-air firmware updates without vehicle reprogramming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S12XDP512MALR | 512 KB flash, 32 KB RAM, same 80-pin LQFP package and peripheral set; higher memory density for complex AUTOSAR stacks | Targeted at full AUTOSAR-compliant ECUs requiring larger OS footprint and multi-core abstraction layers | Select when future software scalability demands >256 KB flash or additional RAM for middleware services |
| S912ZVMC25F0MLFR | Z-series 16-bit core, 256 KB flash, 20 KB RAM, integrated LINPHY, and enhanced safety features (lock-step, ECC RAM) | Designed for ASIL-B/C applications with built-in functional safety mechanisms beyond S9S12XS256J0CAER's baseline compliance | Choose for new designs requiring ISO 26262 ASIL-B certification out-of-box with minimal safety library integration effort |
Compared with MC9S12XDP512MALR and S912ZVMC25F0MLFR, the S9S12XS256J0CAER delivers optimal balance of proven automotive reliability, BDM-programmability, and cost-effective 256 KB flash for mid-tier ECUs-making it ideal for volume production where qualification history and toolchain maturity outweigh raw memory headroom or advanced safety IP.
Availability
S9S12XS256J0CAER is available at Aetrix Electronics and suitable for engine control units, body control modules, and electric power steering systems requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100-compliant traceability.
Supply support for S9S12XS256J0CAER 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 expertise in automotive microcontrollers and functional safety.
The S9S12XS256J0CAER belongs to NXP's legacy HCS12X automotive MCU family, designed specifically for cost-sensitive, high-reliability engine and chassis control applications where proven qualification, mature toolchains, and long-term supply stability are critical.
FAQ
What is the maximum operating frequency of the S9S12XS256J0CAER?
The S9S12XS256J0CAER achieves a maximum core clock frequency of 40 MHz using its internal PLL, derived from an external crystal (typically 4–8 MHz) or internal RC oscillator. This frequency enables deterministic execution of automotive control loops with cycle-accurate timing for PWM and ADC sampling.
Does the S9S12XS256J0CAER support CAN FD?
The S9S12XS256J0CAER integrates two S12MSCAN modules compliant with CAN 2.0A/B only; it does not natively support CAN FD data rates or extended frame formats. CAN FD functionality requires external protocol converters or migration to newer NXP S32K series devices.
How is flash programming performed on the S9S12XS256J0CAER?
Flash programming on the S9S12XS256J0CAER is performed via the single-wire Background Debug Mode (BDM) interface using standard Freescale/NXP BDM tools. The device supports in-circuit programming without removing it from the PCB, and flash sectors can be erased and reprogrammed independently with full security lock/unlock control.
What debug interfaces does the S9S12XS256J0CAER provide?
The S9S12XS256J0CAER provides a dedicated BKGD pin for single-wire BDM communication, enabling full read/write access to memory and registers, breakpoint setting, and real-time variable inspection. It does not support JTAG or SWD; BDM is the sole standardized debug interface for this device.
Is the S9S12XS256J0CAER pin-compatible with other S12XS family members?
Yes, the S9S12XS256J0CAER in the 80-pin LQFP package shares identical pinout with MC9S12XS128 and MC9S12XS64 derivatives. This allows hardware reuse across memory variants, provided PCB layout reserves space for optional external crystals and decoupling capacitors matching the highest-density variant.
S9S12XS256J0CAER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 64-LQFP
- Series:
- HCS12X
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- HCS12X
- Core Size:
- 16-Bit
- Speed:
- 40MHz
- Connectivity:
- CANbus, SCI, SPI
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 44
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- 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:
S9S12XS256J0CAER FAQ
1.How can I place an order for S9S12XS256J0CAER through Aetrix?
Please submit a Request for Quotation (RFQ) for S9S12XS256J0CAER 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 S9S12XS256J0CAER reliable?
The price and inventory of S9S12XS256J0CAER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S9S12XS256J0CAER is usually 5 days.
3.What payment methods are accepted for S9S12XS256J0CAER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S9S12XS256J0CAER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S9S12XS256J0CAER?
S9S12XS256J0CAER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S9S12XS256J0CAER 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 S9S12XS256J0CAER?
For technical support, including S9S12XS256J0CAER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S9S12XS256J0CAER requirements.
6.How does Aetrix verify that S9S12XS256J0CAER is sourced from the original manufacturer or authorized distributors?
All S9S12XS256J0CAER 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 S9S12XS256J0CAER meets industry standards.
7.What is the process for return or replacement of S9S12XS256J0CAER?
All S9S12XS256J0CAER units undergo pre-shipment inspection (PSI). If there is an issue with S9S12XS256J0CAER, 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 S9S12XS256J0CAER part is unused and in its original packaging.
Return procedure for S9S12XS256J0CAER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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