S912XET256J2MAG - 16-bit S12X MCU 256KB Flash 50MHz | NXP
MPN: S912XET256J2MAG ✓ Hoạt độngS912XET256J2MAG Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (RAM), and a rich set of peripherals such as timers, ADC, PWM, communication interfaces. The S12X family sits within NXP's broader automotive 16-bit MCU portfolio and is widely used for body, chassis, and powertrain ECUs where deterministic interrupt response and robust peripheral sets matter more than raw compute throughput.
Key features include 256KB on-chip Flash, 16KB or 32KB RAM (depending on mask set), an XGATE auxiliary core for parallel I/O processing, up to 50MHz bus speed, multiple CAN (MSCAN) and LIN interfaces, an Enhanced Capture Timer (ECT) module, and a 12-bit Analog-to-Digital Converter. The integrated voltage regulator supports 1.8V, 2.8V, and 5V operation from a single external supply.
The HCS12X core is a CISC architecture featuring a 16-bit data path with extended 20-bit address space, an instruction pipeline, and the XGATE RISC co-processor that executes interrupt service routines in parallel with the main CPU. This dual-core approach allows deterministic handling of high-speed CAN, PWM, and ADC sequences without burdening the main thread.
Typical applications include automotive body control modules, CAN/LIN gateway nodes, instrument cluster controllers, HVAC control units, lighting controllers, and industrial automation controllers. The wide operating temperature range and automotive qualification make it well suited to under-hood and chassis-mounted ECUs.
When designing with this device, ensure external decoupling is placed close to the multiple VDD/VSS pin pairs, the XGATE shareable resource access is correctly arbitrated in software, and the BGND pin is properly handled for in-circuit debugging.
This page synthesizes distributor pricing, drop-in alternatives from the S12X family, and practical design notes not always present in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho S912XET256J2MAG — 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 S912XET256J2MAG (cùng hình factor và footprint) — khác nhau ở Operating Temperature, Package, Flash Memory, Core Processor, ADC.
MC9S12XET256CAG
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →S912XET256J2VAG
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →S912XET512J2VAGR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →S912XET512BMAGR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC9S12XDT512MAA
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC9S12XEQ384CAG
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →S912XET256J2MAG Tỷ lệ tối đa & tính chất điện
| Core | HCS12X (CISC 16-bit) |
| Auxiliary Core | XGATE RISC co-processor |
| Program Memory (Flash) | 256 KB (256K x 8) |
| CPU Clock Frequency | 50 MHz |
| Operating Voltage | 1.8 V / 2.8 V / 5 V (integrated regulator) |
| Nhiệt độ hoạt động | -40 C to +125 C (Automotive) |
| Hộp | 144-pin LQFP (20 x 20 mm) |
| Kiểu lắp đặt | Surface Mount |
| Automotive Qualification | Yes (AEC-Q100 grade) |
| CAN (MSCAN) Modules | Multiple (per datasheet) |
| LIN Modules | Per datasheet |
| ADC | 12-bit (per datasheet) |
| Timers | ECT (Enhanced Capture Timer) + others |
| Trạng thái RoHS | Compliant (per NXP product page) |
Hướng dẫn cấu hình chân S912XET256J2MAG 144-pin lqfp (20 x 20 mm)
Cấu hình chân cho S912XET256J2MAG (144-pin lqfp (20 x 20 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 S912XET256J2MAG.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
S912XET256J2MAG phù hợp cho 6 Áp dụngs: Automotive Body Control Module (BCM), CAN/LIN Gateway Node, Instrument Cluster Controller, HVAC Control Module, Automotive Lighting Module (Headlamp Leveller, DRL Controller), Industrial Automation Controller.
Automotive Body Control Module (BCM)
The S912XET256J2MAG fits BCM applications because its 256 KB Flash accommodates lighting, wiper, and central-locking control firmware with margin for diagnostics. The HCS12X CPU at 50 MHz plus the XGATE co-processor deterministically handle multiple LIN slave nodes and switch-input debouncing in parallel. Multiple MSCAN channels enable communication with the vehicle CAN bus for status reporting and command reception. The -40 to +125 C automotive temperature range and AEC-Q100 qualification allow under-dash or door-mounted placement.
Được đề xuất
CAN/LIN Gateway Node
The S912XET256J2MAG is well suited for CAN-to-LIN and CAN-to-CAN gateway nodes because the XGATE co-processor can service high-speed MSCAN interrupts while the HCS12X core executes routing logic. Its 256 KB Flash holds translation tables and protocol stacks, and the 144-LQFP package exposes enough I/O for two CAN transceivers plus multiple LIN channels. Automotive qualification and the integrated 1.8V/2.8V/5V regulator simplify power-tree design.
Được đề xuất
Instrument Cluster Controller
In instrument clusters the S912XET256J2MAG drives gauge stepper motors and a graphic LCD using its Enhanced Capture Timer (ECT) and PWM channels, while the XGATE co-processor refreshes the display in parallel with main CPU diagnostics. The 256 KB Flash stores bitmap data and warning-log algorithms, and the 12-bit ADC reads fuel-level and temperature sensors. AEC-Q100 qualification plus wide temperature tolerance suit the cluster's dashboard thermal environment.
Được đề xuất
HVAC Control Module
The S912XET256J2MAG controls HVAC actuators and reads cabin sensors using its 12-bit ADC for temperature and humidity channels, plus PWM outputs for blower-speed control. The XGATE offloads LIN communication with the vehicle body controller, leaving the HCS12X core free for closed-loop PID control of the air-mix door. The integrated voltage regulator supports direct 12 V battery operation after external regulation, and 256 KB Flash fits calibration tables and diagnostic routines.
Được đề xuất
Automotive Lighting Module (Headlamp Leveller, DRL Controller)
The S912XET256J2MAG controls adaptive headlamp leveling and daytime-running-light modules via its PWM and ECT outputs, with LIN slave communication to the body controller. The HCS12X 50 MHz core executes leveling algorithms based on vehicle pitch/roll data from the CAN bus, while the XGATE co-processor services LIN interrupts deterministically. The 256 KB Flash holds calibration curves and headlamp-zone configuration, and the -40 to +125 C rating supports under-hood-adjacent mounting.
Được đề xuất
Industrial Automation Controller
The S912XET256J2MAG can serve in industrial PLC and motion-control modules where deterministic interrupt response is required. The HCS12X core plus XGATE co-processor handle real-time fieldbus communications (CANopen, DeviceNet) and PWM-driven motor control in parallel, while the 12-bit ADC reads analog sensor channels. The 256 KB Flash fits protocol stacks and PID-control firmware, and the 144-LQFP provides sufficient I/O for multiple encoder inputs and motor outputs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho S912XET256J2MAG — 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 | MC9S12XET256CAG | S912XET256J2VAG | S912XET512J2VAGR | S912XET512BMAGR | MC9S12XDT512MAA |
|---|---|---|---|---|---|---|
| Package | 144-LQFP (20x20) | 144-LQFP - same | 144-LQFP - same | 144-LQFP - same | 144-LQFP - same | 144-LQFP - same |
| Brand | NXP Semiconductors | NXP Semiconductors (Freescale legacy prefix) | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | HCS12X + XGATE | HCS12X + XGATE | HCS12X + XGATE | HCS12X + XGATE | HCS12X + XGATE | HCS12XD + XGATE |
| CPU Clock | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 80 MHz (higher) |
| Flash Size | 256 KB | 256 KB | 256 KB | 512 KB (+100%) | 512 KB (+100%) | 512 KB (+100%) |
| Automotive Grade | AEC-Q100, -40/+125 C | AEC-Q100, -40/+125 C | Extended commercial -40/+105 C | AEC-Q100 (per family) | AEC-Q100 (per family) | AEC-Q100 |
| Pin Count | 144 | 144 | 144 | 144 | 144 | 144 |
| XGATE Co-processor | Yes | Yes | Yes | Yes | Yes | Yes (S12XD variant) |
Bảo phân biệt quan trọng
- Combined HCS12X CPU and XGATE RISC co-processor for parallel I/O servicing (vsMC9S12DT128MPVE (single-core S12D))
- AEC-Q100 automotive qualification at -40 to +125 C in the J2MAG mask set (vsS912XET256J2VAG (extended commercial -40/+105 C))
- 256 KB Flash fits BCM and instrument-cluster firmware with margin (vsS912XET512J2VAGR (512 KB Flash))
Ghi chú thiết kế
The S912XET256J2MAG integrates a voltage regulator that accepts 1.8V, 2.8V, or 5V external supply. Place a 100 nF decoupling capacitor on each VDD/VSS pair adjacent to the IC pins and a bulk 4.7 uF on the regulator output. For 5V-only designs, follow NXP's S12XE reference design for the external ballast and pass-element selection. Estimated power-loss is ~80 mA/MHz at 50 MHz for the CPU core plus XGATE; budget the regulator's thermal dissipation accordingly.
Route the BGND, RESET, and BDM signals to a debug header that follows NXP's standard 6-pin or 14-pin BDM pinout, enabling in-circuit debugging with P&E Multilink or USB-ML-12. Keep trace lengths under 50 mm for BDMCLK and BDMDATA to preserve signal integrity at 50 MHz. Group all VSS pins into a single low-impedance ground plane with via stitching every 10 mm beneath the package thermal pad area.
When migrating from MC9S12XET256CAG (legacy Freescale part number) to S912XET256J2MAG, verify the mask-set identifier in the PARTID register matches your firmware's expected device. Some S12X mask sets add peripheral channels or change RAM size; consult the S12XET256 mask-set errata before locking firmware. Estimated: XGATE shareable-resource access must be issued via semaphores to avoid main-core conflicts.
For MSCAN bus design, place the CAN transceiver within 50 mm of the MCU TXCAN/RXCAN pins and route them as a differential pair with 120 ohm impedance and a 120 ohm termination at the bus ends. Add a common-mode choke if the harness exceeds 1 m. The S912XET256J2MAG MSCAN module supports CAN 2.0A/B at up to 1 Mbps; verify bus timing with the S12X bit-timing calculator before high-speed bring-up.
Thông tin tuân thủ
AEC-Q100 automotive qualified per NXP product page and Mouser listing; -40/+125 C operating temperature confirmed. RoHS compliance per NXP part detail page.