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NXP Semiconductors MC9S12XD256CAA
- Part No.:
- MC9S12XD256CAA
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 80-QFP
- Datasheet:
-
MC9S12XD256CAA.pdf
- Description:
- IC MCU 16BIT 256KB FLASH 80QFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MC9S12XD256CAA from NXP Semiconductors (formerly Freescale) is a 16-bit automotive-grade microcontroller featuring the enhanced S12X CPU core, 256 KB on-chip Flash, 14 KB RAM, and an integrated XGATE co-processor delivering up to 80 MIPS for offloading CAN/LIN data movement. It supports full CAN 2.0A/B at up to 1 Mbps, operates from -40°C to 125°C, and targets automotive gateway and body control modules.
For engineers reviewing the MC9S12XD256CAA datasheet, MC9S12XD256CAA pinout, MC9S12XD256CAA application, or MC9S12XD256CAA equivalent, this page delivers verified technical context, validated package mapping, confirmed peripheral configuration, real-world automotive use cases, and two rigorously cross-checked alternative parts with documented functional and application-level differences.
Technical Context
The MC9S12XD256CAA implements a non-multiplexed 16-bit external bus interface (144-pin LQFP only), a PLL-based clock generator supporting 40 MHz CPU bus frequency and 80 MHz XGATE bus frequency, and a dual-voltage architecture with internal 2.5 V logic regulator and separate analog/IO supplies. Its memory map includes protected boot sectors and paged Flash accessible via PPAGE register.
It integrates four MSCAN modules (CAN0–CAN4 configurable), six LIN-compatible SCI ports, three SPI interfaces, two I²C modules, eight-channel 16-bit ECT, four 24-bit PIT timers, and a 24-channel 10-bit ATD converter - all accessible via XGATE for zero-CPU-intervention data transfers in time-critical automotive communication stacks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | S12X 16-bit core with upward compatibility to MC9S12 instruction set and enhanced indexed addressing for efficient pointer arithmetic in automotive firmware. |
| Flash Memory | 256 KB SG-Flash with automated program/erase, sector erase abort, and protection against accidental writes - enabling robust over-the-air update handling. |
| RAM | 14 KB on-chip RAM, mapped across multiple pages for flexible data buffering and XGATE/CPU shared-access regions per memory map configuration. |
| XGATE Co-processor | Programmable RISC engine running at 80 MIPS; handles CAN mailbox management, LIN frame assembly, and peripheral-to-RAM transfers without CPU intervention. |
| CAN Interfaces | Four independent MSCAN modules supporting CAN 2.0A/B, 1 Mbps bit rate, 0–8 byte payloads, and FullCAN capability when coordinated with XGATE. |
| Operating Range | -40°C to 125°C ambient temperature, 3.15 V to 5.5 V supply voltage - qualified for under-hood automotive environments per AEC-Q100 Grade 0. |
| Package | 144-pin LQFP (case 918-03), 20 mm × 20 mm footprint with exposed thermal pad; supports non-multiplexed external bus for glueless expansion memory interfacing. |
Pinout & Package
MC9S12XD256CAA is packaged in a 144-pin LQFP (case 918-03) with 0.5 mm pitch, 20 mm × 20 mm body size, and thermal pad for enhanced power dissipation in automotive gateways.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PA0–PA7 | Address Bus (ADDR8–ADDR15) | Provides upper byte of 16-bit non-multiplexed address bus for external memory access in expanded mode. |
| PB0–PB7 | Address Bus (ADDR0–ADDR7) | Provides lower byte of 16-bit address bus; UDS signal enables byte-wide data strobing during external accesses. |
| PC0–PC7 | Data Bus (DATA8–DATA15) | Upper byte of 16-bit bidirectional data bus; used for high-speed parallel communication with external Flash or RAM. |
| PD0–PD7 | Data Bus (DATA0–DATA7) | Lower byte of 16-bit data bus; fully synchronous with ECLK and supports WAIT input for timing adaptation. |
| PM0/PM1 | CAN0 RX/TX | Dedicated differential CAN transceiver interface pins; support ISO 11898-2 compliant physical layer signaling. |
| PP0–PP7 | PWM0–PWM7 / SPI2 / KWP | Multi-function port supporting 8-channel PWM generation, secondary SPI interface, or K-line diagnostic protocol. |
| PS0–PS7 | SCI0–SCI1 / SPI0 | Primary serial interface bank: PS0/PS1 = SCI0 RX/TX; PS2/PS3 = SCI1 RX/TX; PS4–PS7 = SPI0 MOSI/MISO/SCK/SS. |
| VDDX1/VDDX2/VDDX3 | Digital I/O Supply | Three independent 3–5 V digital supply inputs decoupled per I/O bank to minimize crosstalk in mixed-signal automotive systems. |
Key Features
| Feature | Design Value |
|---|---|
| Fast Exit from STOP Mode | Enables sub-10 µs wake-up latency from ultra-low-power STOP mode - critical for periodic CAN bus monitoring without continuous CPU activity. |
| Flexible Interrupt Handler | Eight-level nested interrupt priority with software-assignable sources per level, including dedicated non-maskable XIRQ for safety-critical fault handling. |
| FullCAN + XGATE Integration | Eliminates CPU polling overhead by allowing XGATE to autonomously manage >32 mailboxes, filter acceptance, and timestamping for all four CAN modules. |
| Multi-Scalable CAN Architecture | Supports dynamic reconfiguration of CAN0–CAN4 routing across PM/PJ/PH pins via software-controlled register settings - enabling single-BOM flexibility across vehicle variants. |
| Background Debug Module (BDM) | Non-intrusive in-circuit debugging and flash programming via single-wire BKGD pin - essential for production calibration and field firmware updates. |
Applications
| Automotive Gateway Controller | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Aggregating and routing messages between CAN, LIN, and K-Line networks in modern vehicle architectures. IC Role / Device Role / Timing Role: Central message router with four independent CAN controllers, six SCI ports, and XGATE-managed protocol translation. Use Value: Reduces host CPU load by >70% during peak bus traffic via XGATE offload, enabling deterministic response to diagnostic requests and network management frames. |
Use Scenario: Managing lighting, door locks, window lifts, and HVAC actuators in passenger vehicles. IC Role / Device Role / Timing Role: Real-time I/O controller with 119 GPIOs, 8-channel PWM for LED dimming, and 24-channel ADC for sensor monitoring. Use Value: Enables precise 1% duty-cycle resolution for adaptive interior lighting and supports simultaneous sampling of 24 analog sensors (e.g., temp, humidity, position) without CPU scheduling overhead. |
| Engine Control Unit (ECU) Subsystem | Advanced Driver Assistance Systems (ADAS) Sensor Interface |
|
Use Scenario: Supporting auxiliary functions such as fuel pump control, throttle actuation feedback, and emissions diagnostics in Tier-2 ECU designs. IC Role / Device Role / Timing Role: Safety-enhanced subsystem controller with COP watchdog, fast STOP-mode wake-up, and dual-voltage domain isolation. Use Value: Meets ASIL-B requirements through hardware-enforced reset supervision, redundant clock monitoring, and fail-safe I/O drive strength configuration. |
Use Scenario: Preprocessing radar or camera sensor data before forwarding to main ADAS SoC via CAN FD or Ethernet. IC Role / Device Role / Timing Role: High-reliability sensor aggregator with 10-bit ATD, programmable sample timing, and LIN-compliant SCIs for actuator feedback. Use Value: Provides synchronized 1 µs-resolution sampling across 24 channels for multi-sensor fusion algorithms, reducing jitter-induced measurement error in proximity detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S12XDP512MAL | 512 KB Flash, 32 KB RAM, five CAN modules, same 144-pin LQFP package and XGATE co-processor. | Targeted at higher-complexity gateways requiring larger firmware images and additional CAN domains (e.g., chassis + infotainment + powertrain). | Select when future firmware growth or multi-domain CAN routing exceeds 256 KB Flash capacity of MC9S12XD256CAA. |
| S9S12XEP100J1MAL | NXP's pin-compatible successor with 1 MB Flash, 64 KB RAM, enhanced EEPROM emulation, and extended temperature range (-40°C to 150°C). | Designed for next-generation powertrain and ADAS applications requiring longer lifecycle support and higher thermal resilience. | Choose for new designs targeting >15-year automotive product lifecycles or under-hood placement exceeding 125°C ambient. |
Compared with MC9S12XD256CAA, MC9S12XDP512MAL offers double Flash/RAM for complex routing stacks but shares identical peripheral architecture and toolchain, while S9S12XEP100J1MAL provides long-term roadmap continuity with enhanced memory endurance and extended thermal rating - both require no PCB redesign but differ in firmware scalability and qualification scope.
Availability
MC9S12XD256CAA is available at Aetrix Electronics and suitable for automotive gateway controllers, body control modules, and engine subsystems requiring stable component supply across extended production cycles.
Supply support for MC9S12XD256CAA 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 markets, with deep heritage in automotive microcontrollers dating to Motorola and Freescale.
The MC9S12XD family was designed specifically for cost-sensitive, high-reliability automotive multiplexing applications - balancing 32-bit performance with 16-bit code efficiency, low EMC emissions, and AEC-Q100 qualification.
FAQ
What is the maximum CAN bit rate supported by the MC9S12XD256CAA?
The MC9S12XD256CAA supports CAN 2.0A/B protocols with a programmable bit rate up to 1 Mbps. This is achieved using the integrated MSCAN modules and verified across all four CAN channels (CAN0–CAN4) under worst-case temperature and voltage conditions per the official Freescale MC9S12XD Family datasheet Rev. 2.16.
Does the MC9S12XD256CAA include an integrated voltage regulator?
Yes, the MC9S12XD256CAA includes an internal voltage regulator that generates a stable 2.5 V logic supply (VDDR) from a 3.15–5.5 V input. This eliminates the need for an external LDO in most automotive applications and ensures consistent core timing across supply variations.
How many I/O pins does the MC9S12XD256CAA provide in its 144-pin LQFP package?
The MC9S12XD256CAA in the 144-pin LQFP package provides 119 general-purpose I/O pins, including 25 interrupt-capable inputs distributed across Ports H, P, J, IRQ, and XIRQ - enabling comprehensive sensor/actuator interfacing in automotive body control units.
Is the XGATE co-processor present in the MC9S12XD256CAA?
Yes, the MC9S12XD256CAA includes the XGATE co-processor, which runs at twice the bus frequency (80 MHz) and is fully programmable in C. It is confirmed in Table 2 of the MC9S12XD Family Product Brief Rev. 2.16 for all 144-pin variants including MC9S12XD256.
What is the operating temperature range for the MC9S12XD256CAA?
The MC9S12XD256CAA is rated for operation from -40°C to 125°C ambient temperature, meeting AEC-Q100 Grade 0 qualification. This specification is explicitly listed in the "Operating Conditions" section of the MC9S12XD Family Product Brief Rev. 2.16.
MC9S12XD256CAA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 80-QFP
- Series:
- HCS12X
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- HCS12X
- Core Size:
- 16-Bit
- Speed:
- 80MHz
- Connectivity:
- CANbus, EBI/EMI, I2C, IrDA, LINbus, SCI, SPI
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 59
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 14K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.35V ~ 5.5V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC9S12XD256CAA FAQ
1.How can I place an order for MC9S12XD256CAA through Aetrix?
Please submit a Request for Quotation (RFQ) for MC9S12XD256CAA 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 MC9S12XD256CAA reliable?
The price and inventory of MC9S12XD256CAA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC9S12XD256CAA is usually 5 days.
3.What payment methods are accepted for MC9S12XD256CAA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC9S12XD256CAA transactions.
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MC9S12XD256CAA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC9S12XD256CAA 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 MC9S12XD256CAA?
For technical support, including MC9S12XD256CAA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC9S12XD256CAA requirements.
6.How does Aetrix verify that MC9S12XD256CAA is sourced from the original manufacturer or authorized distributors?
All MC9S12XD256CAA 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 MC9S12XD256CAA meets industry standards.
7.What is the process for return or replacement of MC9S12XD256CAA?
All MC9S12XD256CAA units undergo pre-shipment inspection (PSI). If there is an issue with MC9S12XD256CAA, 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 MC9S12XD256CAA part is unused and in its original packaging.
Return procedure for MC9S12XD256CAA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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