MC9S12XDT256VAA - 16-bit HCS12X MCU 256KB Flash 80MHz | NXP
MPN: MC9S12XDT256VAA ✗ Cuối đờiMC9S12XDT256VAA Tóm tắt
An MCU (microcontroller) is a single-chip processor that integrates a CPU core, program memory (Flash), data memory (RAM), peripherals (timers, ADC, communication interfaces), and interrupt logic into one device. Within the semiconductor taxonomy, an MCU sits under microprocessor -> microcontroller -> embedded controller, and the HCS12X series specifically targets automotive body, chassis, and powertrain applications where deterministic interrupt response and CAN connectivity are critical.
Key features of the MC9S12XDT256VAA include 256KB (256K x 8) Flash, 12KB RAM, an enhanced XGATE coprocessor for offloading interrupt-driven tasks from the main CPU, multiple CAN 2.0 controllers, an 8-channel 10-bit ADC, and an SCI/SPI/I2C peripheral set. The HCS12X core is upward-compatible with the HCS12 instruction set while adding an instruction queue and enhanced indexed addressing modes.
Architecturally, the HCS12X core pairs the legacy CISC S12 CPU with the XGATE RISC-style coprocessor that runs at 80MHz and can service peripheral interrupts autonomously, effectively doubling real-time throughput for I/O-heavy applications. The part operates from a 2.5V/5V supply rail, making it compatible with both 3.3V and 5V automotive sensor networks.
Typical applications include automotive body control modules, CAN gateway nodes, instrument clusters, HVAC controllers, and industrial CAN-based sensor hubs. The wide operating voltage and integrated CAN make it especially suited to in-vehicle networking where EMC robustness is required.
Design consideration: because the part is NRND, validate long-term supply with NXP before committing new designs; PCN windows and last-time-buy dates should be confirmed via the NXP product page. Ensure your PCB footprint matches the 80-QFP (14x14) land pattern and that your linker script reserves the XGATE memory region correctly.
This page synthesizes distributor pricing, drop-in S12XD-family alternatives, and practical design notes not always consolidated in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho MC9S12XDT256VAA — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MC9S12XDT256VAA (cùng hình factor và footprint) — khác nhau ở Package, ADC, Operating Temperature, Connectivity, Core Architecture.
MC9S12XDT256VAL
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC9S12XD256VAA
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC9S12XA256VAA
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC9S12XDT512MAA
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC9S12XDG128CAA
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC9S12XDT256VAA Tỷ lệ tối đa & tính chất điện
| Core | HCS12X (16-bit CISC) |
| CPU Speed | 80 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| RAM | 12 KB |
| Data EEPROM | 4 KB |
| ADC | 10-bit, 8 channels |
| CAN Controllers | 2 x CAN 2.0A/B |
| SCI / SPI / I2C | Yes |
| XGATE Coprocessor | Yes (80 MHz) |
| Operating Voltage | 2.35 V to 5.5 V (typical 2.5V/5V) |
| Hộp | 80-QFP (14x14 mm) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +105C (automotive) |
Hướng dẫn cấu hình chân MC9S12XDT256VAA 80-qfp (14x14 mm)
Cấu hình chân cho MC9S12XDT256VAA (80-qfp (14x14 mm) gói). IC số này bao gồm chân GPIO, giao diện truyền thông (UART, SPI, I2C) và chân nguồn. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết các chức năng chân thay thế và tùy chọn cấu hình. Cực kỳ quan trọng cho thiết kế hệ thống tích hợp và lập trình PCB.
Không có dữ liệu chân cụ thể sẵn có cho MC9S12XDT256VAA.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
MC9S12XDT256VAA phù hợp cho 6 Áp dụngs: Automotive Body Control Module, CAN Gateway Node, Automotive Instrument Cluster, HVAC Control Module, Industrial CAN Sensor Hub, Electric Vehicle Charger (On-board) Controller.
Automotive Body Control Module
The MC9S12XDT256VAA's 80 MHz HCS12X core, dual CAN 2.0 controllers, and 256 KB Flash make it a strong fit for body control modules (BCMs) that orchestrate door locks, lighting, mirrors, and wipers. The XGATE coprocessor handles CAN message buffering and PWM updates without CPU intervention, freeing the S12X core for application logic. Wide 2.35V-5.5V supply tolerates load-dump transients on the 12V automotive bus when paired with a proper front-end regulator. Compared with newer Cortex-M BCM solutions, this part offers proven automotive qualification and a stable CodeWarrior toolchain.
Được đề xuất
CAN Gateway Node
For in-vehicle CAN/CAN gateway routing between body, chassis, and powertrain networks, the MC9S12XDT256VAA provides two independent CAN 2.0A/B controllers and 256 KB Flash to host routing tables and OBD-II stacks. The 80 MHz CPU can sustain bus loads up to ~70% with proper filtering, and XGATE accelerates message acceptance filtering. The 80-QFP package is footprint-compatible across the S12XD family, easing migration to higher-Flash variants if routing tables grow.
Được đề xuất
Automotive Instrument Cluster
Instrument clusters driving stepper motors for gauges and LCDs benefit from the MC9S12XDT256VAA's enhanced indexed addressing and PWM channels. The 10-bit ADC reads fuel level and temperature sensors with adequate resolution for cluster indication, while the SCI/SPI peripherals drive stepper drivers and display controllers. The 256 KB Flash comfortably hosts a real-time operating system plus gauge graphics library.
Được đề xuất
HVAC Control Module
HVAC modules mix CAN communication with analog temperature/blend-door sensing. The MC9S12XDT256VAA's 10-bit ADC with 8 channels reads cabin and external temperature sensors, while its PWM outputs drive blower motors and blend actuators. The HCS12X core's deterministic interrupt response ensures consistent update rates for closed-loop temperature control. Operating range to -40C/+105C supports under-dash automotive environments.
Được đề xuất
Industrial CAN Sensor Hub
Outside automotive, the MC9S12XDT256VAA is well-suited to industrial CANopen or DeviceNet sensor hubs that aggregate analog and digital I/O. The dual CAN ports support redundant bus topologies, and the 256 KB Flash hosts protocol stacks like CANopen CIA 401. The 5V supply tolerance allows direct connection to legacy 24V industrial sensors with simple resistive dividers.
Được đề xuất
Electric Vehicle Charger (On-board) Controller
Lower-power on-board EV charger controllers using CAN for vehicle-to-charger communication leverage the MC9S12XDT256VAA's dual CAN ports and 256 KB Flash to host SAE J1772 handshake logic plus PWM pilot generation. The XGATE coprocessor can service high-frequency PWM without CPU load, and the wide operating voltage tolerates 12V supply variations during load transients.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC9S12XDT256VAA — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | MC9S12XDT256VAL | MC9S12XD256VAA | MC9S12XA256VAA | MC9S12XDT512MAA | MC9S12XDG128CAA |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 80-QFP (14x14 mm) | 80-QFP (14x14) - same | 80-QFP (14x14) - same | 80-QFP (14x14) - same | 80-QFP (14x14) - same | 80-QFP (14x14) - same |
| Core | HCS12X | HCS12X | HCS12X | S12XA | HCS12X | HCS12X |
| CPU Speed | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Flash | 256 KB | 256 KB | 256 KB | 256 KB | 512 KB (+100%) | 128 KB (-50%) |
| CAN Controllers | 2 x CAN 2.0 | 2 x CAN 2.0 | 2 x CAN 2.0 | 1-2 x CAN 2.0 | 2 x CAN 2.0 | 2 x CAN 2.0 |
| XGATE Coprocessor | Yes | Yes | Optional | No | Yes | Yes |
Bảo phân biệt quan trọng
- XGATE coprocessor for autonomous peripheral servicing (vsMC9S12XA256VAA)
- Larger Flash than smaller S12XD siblings (vsMC9S12XDG128CAA)
- Mature automotive qualification pedigree (vsNewer S12XE parts)
Ghi chú thiết kế
Estimated: the 80-QFP package has a 0.65 mm pin pitch and 14x14 mm body. Reserve at least 0.2 mm clearance between adjacent pads and route all power pins (VDDR/VSS) with wide copper pours to support peak in-rush current during Flash programming. Place the 2.5V/5V regulator and decoupling capacitors within 5 mm of the MCU supply pins to minimize switching transients on the analog reference.
Because the MC9S12XDT256VAA is NRND, validate long-term supply commitments with NXP before locking in your design. Migrating firmware to a non-NRND S12XE variant such as MC9S12XEP100MAL or MC9S12XEQ384CAG requires linker-script updates because the XGATE memory window and interrupt vector table layout differ. Plan firmware portability up front by keeping the S12X core-specific code in isolated modules.
The wide 2.35V-5.5V supply range is convenient for mixed 3.3V/5V designs, but automotive load-dump events can exceed 5.5V on the raw 12V bus. A TVS diode plus series resistor or a pre-regulator is required upstream of the MCU supply pin. Per the NXP datasheet, the internal voltage regulator provides the 2.5V core rail from the 5V input; ensure adequate bulk capacitance on VDDX.
Thông tin tuân thủ
AEC-Q100 qualification inferred from automotive-grade designation in NXP product page. RoHS, REACH, lead-free, and halogen-free status not explicitly stated in verified web data - confirm via NXP material declaration documents.