S912XET256J2MAGR - 16-bit S12X MCU, 256KB Flash, 50MHz | NXP
料号： S912XET256J2MAGR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $15.17 | $15.17 |
| 10 | $14.5 | $145.00 |
| 100 | $13.2 | $1,320.00 |
| 500 | $11.95 | $5,975.00 |
| 1,000 | $10.65 | $10,650.00 |
S912XET256J2MAGR 概述
A 16-bit MCU (microcontroller unit) is a single-chip computer that integrates a CPU, Flash program memory, SRAM data memory, and a peripheral set around a 16-bit data path. The S12X family specifically extends the classic S12 core with the XGATE auxiliary peripheral processor and a 32-bit ALU, allowing the S912XET256J2MAGR to handle complex real-time control loops that previously required a separate DSP. Within the wider taxonomy, MCUs sit at the foundation of embedded systems, alongside microprocessors, FPGAs, and DSPs.
The device runs from a 3.13 V to 5.5 V supply, offers 16 KB of RAM, and includes CAN, SPI, SCI, and IIC interfaces alongside up to 91 GPIO pins. Compatibility with the legacy 9S12 instruction set and an integrated background-debug-mode interface simplify migration paths from earlier S12 designs, preserving firmware and JTAG tool investments.
For automotive deployments, the device provides ECC-protected Flash and on-chip voltage regulation. It is frequently used alongside companion S12X transceivers and CAN physical-layer drivers such as the TJA1057 to form complete in-vehicle networking nodes. The 144-pin LQFP footprint also provides ample headroom for adding motor drivers or sensor interfaces on the outer ring.
Engineers should evaluate the XGATE interrupt vector map and shared-RAM arbitration rules before porting code from older 9S12 designs. Programming and debug are supported by NXP's CodeWarrior and P&E Micro BDM tools. Total height including the lead footprint must be checked against enclosure constraints in under-dash modules.
直接替换替代料： S912XET256J2MAGR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： S912XET256J2MAGR （相同外形与封装尺寸） ——差异在于 Package, Operating Temperature, Core, ADC Resolution, EEPROM.
快速对比工具——选择替代料号进行并排对比：
S912XET256J2VAG
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →S912XET512BMAGR
✅ 直接替换✓ 有现货
$6.6 / 个
查看数据手册 →S912XET512J2VAGR
✅ 直接替换✓ 有现货
$1 / 个
查看数据手册 →MC9S12XDT512MAA
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →S912XEQ384J2VAL
✅ 直接替换📋 参考替代料（不在目录中）
MC9S12DT128MPVE
✅ 直接替换✓ 有现货
$36.5 / 个
查看数据手册 →MC9S12XEP768CAG
✅ 直接替换✓ 有现货
$19.85 / 个
查看数据手册 →S912XET256J2MAGR 最大额定值与电气特性
| Core | HCS12X (S12X CPU with XGATE coprocessor) |
| 数据总线宽度 | 16-bit |
| Program Memory Size | 256 KB |
| Program Memory Type | Flash |
| RAM Size | 16 KB |
| 最大时钟频率 | 50 MHz |
| Supply Voltage Range | 3.13 V to 5.5 V |
| 工作温度范围 | -40 C to +125 C (automotive) |
| Number of I/O Pins | Up to 91 |
| 封装 | 144-pin LQFP (20x20 mm, LFQFP / gull wing) |
| Peripherals | CAN, SPI, SCI, IIC, PWM, A/D, Timers |
| AEC-Q100 Qualification | Automotive Grade |
| Debug Interface | Background Debug Mode (BDM) |
| Instruction Set Compatibility | HCS12 / 9S12 with XGATE extensions |
| 安装类型 | Surface Mount |
| Lead-Free / RoHS | Compliant (NXP automotive product line) |
S912XET256J2MAGR 引脚配置
| 引脚 1 | BKGD — Background Debug Mode interface for in-circuit programming / debug |
| 引脚 2 | VDDR — Internal voltage regulator output; requires external decoupling |
| 引脚 3 | VSS1 — Ground (supply return) |
| 引脚 4 | VDD1 — Digital supply voltage (3.13 V to 5.5 V) |
| 引脚 5 | XIRQ — Non-maskable external interrupt request input |
| 引脚 6 | IRQ — Maskable external interrupt request input |
| 引脚 7 | RESET — External reset input, active low |
| 引脚 8 | MODC — Mode selection for BDM / normal operation |
| 引脚 9 | VRH — ADC high reference voltage |
| 引脚 10 | VRL — ADC low reference voltage |
典型应用
S912XET256J2MAGR 适用于 6 应用s: Automotive Body Control Module (BCM), Chassis and Suspension ECU, Industrial HVAC Climate Control, Dashboard Instrument Cluster, Electric Power Steering ECU, Industrial CAN Network Gateway.
Automotive Body Control Module (BCM)
The S912XET256J2MAGR's 16-bit HCS12X core and 256 KB of Flash make it ideal for body control modules that coordinate lighting, wipers, central locking, and mirror functions. The 50 MHz CPU plus XGATE coprocessor absorbs interrupt storm from CAN door switches and PWM dimming without dropping packets. AEC-Q100 qualification and -40 to +125 C operating range cover the cabin temperature envelope. The 91 GPIO pins expose enough headroom to drive discrete body loads and read switch matrices. Placed next to a CAN transceiver on the same PCB for 12V battery-tolerant LIN/CAN connectivity.
推荐
Chassis and Suspension ECU
Chassis ECUs handling anti-lock braking, electronic stability, and active suspension need deterministic real-time response from the S912XET256J2MAGR. The XGATE accelerator offloads DMA-style data movement so the S12X core stays focused on PID control loops. CAN-FD-friendly peripherals and 16 KB RAM accommodate sensor-fusion code from wheel-speed and IMU inputs. The 144-LQFP footprint allocates generous board real estate to analog signal conditioning and isolated CAN bus drivers. Pair with an external watchdog supervisor and a switching regulator for the 5V rail.
推荐
Industrial HVAC Climate Control
The S912XET256J2MAGR supports HVAC control in trucks, tractors, and off-road equipment with -40 to +125 C automotive-grade robustness. The 256 KB Flash holds HVAC finite state machines plus diagnostic code; 16 KB RAM sustains PID control loops and backlight control. PWM channels drive variable-speed blower and blend-door motors, while SPI/IIC tie into analog front-ends for cabin temperature and humidity. The 144-LQFP package fits standard through-hole-board retrofits and human-machine interface daughterboards.
推荐
Dashboard Instrument Cluster
Instrument clusters and graphical dashboards use the S912XET256J2MAGR to drive stepper gauges and LCD sub-displays while communicating over CAN. The S12X core handles odometer math and warning-light arbitration, while XGATE offloads timer-managed gauge stepping. The 16 KB SRAM serves buffering for CAN messages, and the abundant GPIO drives discrete tell-tale LEDs. AEC-Q100 qualification and 5V supply tolerance ease integration with automotive power rails. Pair with a CAN-FD transceiver and a stepper-motor predriver companion.
推荐
Electric Power Steering ECU
In electric power steering ECUs the S912XET256J2MAGR executes torque, angle, and rotor-position control loops with deterministic interrupt latency. The XGATE coprocessor handles DMA-style encoder capture while the main S12X core drives PID and ramp compensation. CAN-FD protocol support keeps the bus bandwidth headroom for steer-by-wire command and redundant sensors. The 144-LQFP package makes layout-friendly routing to gate drivers and resolver interface circuits. AEC-Q100 +125 C grade supports in-cavity placement near the steering column.
推荐
Industrial CAN Network Gateway
The S912XET256J2MAGR's dual CAN controllers and 50 MHz CPU with XGATE make it a natural CAN-to-CAN/CAN-to-LIN gateway in industrial automation equipment. 256 KB Flash stores protocol stack and routing logic; 16 KB RAM buffers inter-segment message queues. AEC-Q100 automotive grading also fits heavy-industrial environments, and the 144-LQFP isolates analog routes cleanly. Pair with isolated CAN transceivers and a hardware watchdog supervisor for IEC 61131-2 environments.
推荐
推荐产品汇总
工程参考数据： S912XET256J2MAGR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | S912XET256J2VAG | S912XET512BMAGR | MC9S12DT128MPVE | MC9S12XDT512MAA |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) - same | 144-LQFP (20x20 mm) - same | 144-LQFP (20x20 mm) - same | 144-LQFP - same |
| Core | HCS12X (S12X + XGATE) | HCS12X (S12X + XGATE) | HCS12X (S12X + XGATE) | HCS12 (no XGATE) | HCS12X (S12X + XGATE) |
| Flash Size | 256 KB | 256 KB | 512 KB | 128 KB | 512 KB |
| RAM Size | 16 KB | 16 KB | 32 KB | 8 KB | 32 KB |
| Maximum Clock Frequency | 50 MHz | 50 MHz | 50 MHz | 25 MHz | 50 MHz |
| Automotive Grade | Yes (-40 to +125 C, AEC-Q100) | Industrial grade | Yes (automotive) | Yes (automotive) | Yes (automotive) |
| Can Controllers | 2 x CAN | 2 x CAN | 4 x CAN | 2 x CAN | 4 x CAN |
关键差异点
- XGATE co-processor offloads real-time interrupt tasks （对比 MC9S12DT128MPVE)
- 256 KB Flash balances memory headroom and cost in body control ECUs （对比 S912XET512BMAGR)
- AEC-Q100 +125 C automotive qualification （对比 S912XET256J2VAG)
设计说明
Place a 0.1 uF + 4.7 uF / 10 uF ceramic bypass capacitor as close as practical to every VDD pin pair (1-2 pairs on the LQFP). Connect VDDR with its own decoupling to stabilize the internal 2.5 V regulator. Keep noisy switching loads off the same regulator node as the MCU to avoid glitches during PWM edges.
Route the 50 MHz XTAL traces short, symmetric, and guarded by a ground pour. Place the crystal within 0.5 inch of the EXTAL/XTAL pins. Match the trace lengths from the MCU to the CAN transceiver to within 50 mil to avoid skew. Place a TVS diode near the external 12 V supply input for automotive transient suppression per ISO 7637-2.
Estimated: when migrating firmware from the MC9S12DT128 to this S12XE-family device, the XGATE interrupt vector table layout differs - reassign vector numbers and review shared-RAM arbitration. Do not assume the JTAG/BDM pinout is identical across all 144-LQFP S12X parts - the BKGD/MODC pin functions are shared but other JTAG functions move. Always verify by reading the device errata referenced in the NXP S12XPIMC256 datasheet before committing to a migration.
合规信息
AEC-Q100 automotive qualified per NXP product page; RoHS and REACH compliant; lead-free; halogen-free status not explicitly cited in scraped data
