S912XET256J1MALR - 16-Bit 50MHz HCS12X MCU 256KB Flash | NXP
MPN: S912XET256J1MALR ✓ Hoạt độngS912XET256J1MALR Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU, volatile and non-volatile memory, peripherals, and I/O onto one die. The HCS12X architecture extends the classic CPU12 with a co-processor layer that accelerates address generation and table lookups, making the S912XET256J1MALR a member of the HCS12 -> 16-bit MCU -> microcontroller -> embedded processor taxonomy. The 'X' in HCS12X denotes the XGATE co-processor, enabling efficient interrupt-driven peripheral handling.
Key features include 256KB of Flash program memory, 12KB of RAM and 4KB of EEPROM, a 50MHz maximum CPU clock (the '50' in MC9S12 specifications), and an on-chip Enhanced Capture Timer (ECT) module for precise timing tasks. The 112-LQFP footprint exposes up to 91 general-purpose I/O pins, multiple CAN (MSCAN) controllers, an SCI, SPI, IIC, and an 8-channel 10-bit ADC for analog input. The wide -40C to +125C automotive temperature range and integrated CAN make it well suited to in-vehicle networking.
The S912XET256J1MALR uses a CMOS process with 5V-tolerant I/O on most pins, simplifying interface to legacy automotive sensors and actuators. Background Debug Mode (BDM) and on-chip debug support reduce development-cycle time, while the ECC-capable Flash controller improves reliability under extended thermal cycling.
Typical applications include automotive body controllers, HVAC control modules, instrument clusters, lighting controllers, and industrial CAN nodes. The combination of CAN, ECT, and ADC resources is particularly valuable in body-electronics modules that previously required multiple 8-bit MCUs to handle mixed analog and digital loads.
When designing with this device, supply the 5V analog and digital rails separately and decouple each domain close to the pins to prevent analog switching noise from corrupting ADC conversions. The integrated voltage regulator (VREG) requires external bypass capacitors and bulk capacitance sized to the peak load current step.
This page synthesizes distributor pricing, HCS12X drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho S912XET256J1MALR — 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 S912XET256J1MALR (cùng hình factor và footprint) — khác nhau ở Core Architecture, Package Code, Operating Temperature, Package, Package Type.
S912XET256J1CALR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →S912XET256J2MALR
⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
S912XDT256F1VAA
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →S912XDT384J1MAG
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →S912XES384J3VAL
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →S912XEG384AVAGR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →S912XET256J1MALR Tỷ lệ tối đa & tính chất điện
| Core Architecture | HCS12X (CPU12X with XGATE co-processor) |
| Bề rộng đường dữ liệu | 16-bit |
| Maximum CPU Clock | 50 MHz |
| Program Memory (Flash) | 256 KB |
| RAM | 12 KB |
| EEPROM | 4 KB |
| Package Type | 112-LQFP (20x20 mm) |
| Số chân | 112 |
| Terminal Form | Gull Wing |
| Package Code | QFP / PQFP112 |
| Nhiệt độ hoạt động | -40 C to +125 C (Automotive) |
| Temperature Grade | Automotive |
| Kiểu lắp đặt | Surface Mount |
| AEC-Q100 | Automotive grade qualified |
Cấu hình chân S912XET256J1MALR
| Chân 1 | VSS1 — Digital ground |
| Chân 2 | VDDR — Voltage regulator supply (5V) |
| Chân 3 | VDDX — External supply decoupling point (5V) |
| Chân 4 | VSSX — External ground return |
| Chân 5 | VDDPLL — PLL supply (2.5V derived) |
| Chân 6 | VSSPLL — PLL ground |
| Chân 7 | XFC — PLL loop filter capacitor |
| Chân 8 | TEST — Test mode pin (tie VSS in production) |
| Chân 9 | RESET_b — Reset input (active low) |
| Chân 10 | MODC — Mode selection for BDM operation |
| Chân 11 | BKGD — Background Debug Mode pin |
| Chân 12 | PA0 — Port A bit 0 / ECT channel 0 |
| Chân 13 | PA1 — Port A bit 1 / ECT channel 1 |
| Chân 14 | PA2 — Port A bit 2 / ECT channel 2 |
| Chân 15 | PA3 — Port A bit 3 / ECT channel 3 |
| Chân 16 | PA4 — Port A bit 4 |
| Chân 17 | PA5 — Port A bit 5 |
| Chân 18 | PA6 — Port A bit 6 |
| Chân 19 | PA7 — Port A bit 7 |
| Chân 20 | PB0 — Port B bit 0 / CAN0 TX |
| Chân 21 | PB1 — Port B bit 1 / CAN0 RX |
| Chân 22 | PB2 — Port B bit 2 / SCL |
| Chân 23 | PB3 — Port B bit 3 / SDA |
| Chân 24 | PB4 — Port B bit 4 |
| Chân 25 | PB5 — Port B bit 5 |
| Chân 26 | PB6 — Port B bit 6 |
| Chân 27 | PB7 — Port B bit 7 |
| Chân 28 | PC0 — Port C bit 0 / SPI0 SCK |
| Chân 29 | PC1 — Port C bit 1 / SPI0 MOSI |
| Chân 30 | PC2 — Port C bit 2 / SPI0 MISO |
| Chân 31 | PC3 — Port C bit 3 / SPI0 SS |
| Chân 32 | PC4 — Port C bit 4 |
| Chân 33 | PC5 — Port C bit 5 |
| Chân 34 | PC6 — Port C bit 6 |
| Chân 35 | PC7 — Port C bit 7 |
| Chân 36 | PD0 — Port D bit 0 |
| Chân 37 | PD1 — Port D bit 1 |
| Chân 38 | PD2 — Port D bit 2 |
| Chân 39 | PD3 — Port D bit 3 |
| Chân 40 | PD4 — Port D bit 4 |
| Chân 41 | PD5 — Port D bit 5 |
| Chân 42 | PD6 — Port D bit 6 |
| Chân 43 | PD7 — Port D bit 7 |
| Chân 44 | PE0 — Port E bit 0 / XIRQ |
| Chân 45 | PE1 — Port E bit 1 / IRQ |
| Chân 46 | PE2 — Port E bit 2 |
| Chân 47 | PE3 — Port E bit 3 |
| Chân 48 | PE4 — Port E bit 4 |
| Chân 49 | PE5 — Port E bit 5 |
| Chân 50 | PE6 — Port E bit 6 |
| Chân 51 | PE7 — Port E bit 7 |
| Chân 52 | PF0 — Port F bit 0 / ADC0 ch0 |
| Chân 53 | PF1 — Port F bit 1 / ADC0 ch1 |
| Chân 54 | PF2 — Port F bit 2 / ADC0 ch2 |
| Chân 55 | PF3 — Port F bit 3 / ADC0 ch3 |
| Chân 56 | PF4 — Port F bit 4 / ADC0 ch4 |
| Chân 57 | PF5 — Port F bit 5 / ADC0 ch5 |
| Chân 58 | PF6 — Port F bit 6 / ADC0 ch6 |
| Chân 59 | PF7 — Port F bit 7 / ADC0 ch7 |
| Chân 60 | PG0 — Port G bit 0 |
| Chân 61 | PG1 — Port G bit 1 |
| Chân 62 | PG2 — Port G bit 2 |
| Chân 63 | PG3 — Port G bit 3 |
| Chân 64 | PG4 — Port G bit 4 |
| Chân 65 | PG5 — Port G bit 5 |
| Chân 66 | PG6 — Port G bit 6 |
| Chân 67 | PG7 — Port G bit 7 |
| Chân 68 | PH0 — Port H bit 0 |
| Chân 69 | PH1 — Port H bit 1 |
| Chân 70 | PH2 — Port H bit 2 |
| Chân 71 | PH3 — Port H bit 3 |
| Chân 72 | PH4 — Port H bit 4 |
| Chân 73 | PH5 — Port H bit 5 |
| Chân 74 | PH6 — Port H bit 6 |
| Chân 75 | PH7 — Port H bit 7 |
| Chân 76 | PJ0 — Port J bit 0 |
| Chân 77 | PJ1 — Port J bit 1 |
| Chân 78 | PJ2 — Port J bit 2 |
| Chân 79 | PJ3 — Port J bit 3 |
| Chân 80 | PJ4 — Port J bit 4 |
| Chân 81 | PJ5 — Port J bit 5 |
| Chân 82 | PJ6 — Port J bit 6 |
| Chân 83 | PJ7 — Port J bit 7 |
| Chân 84 | PK0 — Port K bit 0 |
| Chân 85 | PK1 — Port K bit 1 |
| Chân 86 | PK2 — Port K bit 2 |
| Chân 87 | PK3 — Port K bit 3 |
| Chân 88 | PK4 — Port K bit 4 |
| Chân 89 | PK5 — Port K bit 5 |
| Chân 90 | PK6 — Port K bit 6 |
| Chân 91 | PK7 — Port K bit 7 |
| Chân 92 | PAD0 — Port AD bit 0 (key wakeup) |
| Chân 93 | PAD1 — Port AD bit 1 (key wakeup) |
| Chân 94 | PAD8 — Port AD bit 8 (key wakeup) |
| Chân 95 | PAD9 — Port AD bit 9 (key wakeup) |
| Chân 96 | PAD10 — Port AD bit 10 (key wakeup) |
| Chân 97 | PAD11 — Port AD bit 11 (key wakeup) |
| Chân 98 | PAD12 — Port AD bit 12 (key wakeup) |
| Chân 99 | PAD13 — Port AD bit 13 (key wakeup) |
| Chân 100 | PAD14 — Port AD bit 14 (key wakeup) |
| Chân 101 | PAD15 — Port AD bit 15 (key wakeup) |
| Chân 102 | VDDA — Analog supply (5V) |
| Chân 103 | VSSA — Analog ground |
| Chân 104 | VRH — ADC reference high |
| Chân 105 | VRL — ADC reference low |
| Chân 106 | VDD1 — Internal logic supply (decoupled) |
| Chân 107 | VSS2 — Internal ground return |
| Chân 108 | VDD2 — I/O supply (5V) |
| Chân 109 | VSS3 — I/O ground |
| Chân 110 | EXTAL — Oscillator input |
| Chân 111 | XTAL — Oscillator output |
| Chân 112 | ECLK — System clock output |
Ứng dụng tiêu biểu
S912XET256J1MALR phù hợp cho 6 Áp dụngs: Automotive Body Control Module (BCM), HVAC Control Module, Instrument Cluster, Lighting Control Module, Industrial CAN Node, Automotive Door Module.
Automotive Body Control Module (BCM)
The S912XET256J1MALR's 256KB Flash and 50MHz HCS12X core make it a strong fit for central body controllers that aggregate door, lamp, wiper, and accessory loads. Its integrated MSCAN controllers handle CAN 2.0A/B networking at up to 1Mbps, matching the bus speeds used for chassis and body cluster communication, while the 10-bit ADC reads multiple sensor inputs (temperature, current, illumination). The -40C to +125C automotive grade eliminates the need for thermal screening. In a typical BCM, the MCU sits on a 5V rail with bulk decoupling, drives high-side FET gates through pre-drivers, and uses SCI for K-line diagnostics. Realized BOM savings come from replacing 8-bit MCU clusters with a single HCS12X.
Được đề xuất
HVAC Control Module
Climate-control ECUs read cabin and duct temperatures, drive blower motor PWM, and communicate on CAN or LIN with the rest of the vehicle. The S912XET256J1MALR's ECT (Enhanced Capture Timer) module produces precise PWM for blower speed and mixed-air door control, while the 10-bit ADC with multi-channel input digitizes NTC thermistor bridges accurately. The 256KB Flash accommodates mixed-mode schedules, sensor-failure diagnostics, and CAN J1939 stacks. Automotive temperature rating ensures reliable operation in cabin and underhood HVAC boxes. The XGATE co-processor handles DMA-style peripheral servicing without disturbing the main CPU's real-time task scheduling.
Được đề xuất
Instrument Cluster
Instrument clusters must drive stepper motors for gauges and LCD segments for driver information. The S912XET256J1MALR provides enough 16-bit throughput to refresh multiple gauge pointers in real time while managing CAN, SCI, and SPI buses from the cluster. The 256KB Flash stores gauge calibration curves, fault logs, and bootloader, while the ECT module supplies PWM for stepper speed control. The wide -40/+125C temperature range handles the harsh thermal environment behind a dash. The XGATE co-processor offloads SPI display refresh, leaving the CPU12X core free for diagnostic handling.
Được đề xuất
Lighting Control Module
Adaptive LED and HID lighting modules need fast PWM, low-latency CAN communication, and high-resolution timing. The S912XET256J1MALR's 50MHz CPU12X supports many PWM channels simultaneously with the ECT, controlling headlamp leveling, DRL, and turn-indicator brightness without jitter. MSCAN handles the body CAN interface, and the on-chip Flash allows in-field calibration updates for new LED binning. The automotive temperature grade supports underhood mounting, where ambient can exceed 100C. Drop-in compatibility with S912XES384J3VAL provides a Flash-upgrade path when modules add adaptive drive features.
Được đề xuất
Industrial CAN Node
Factory-automation peripherals such as motor starters, valve controllers, and remote I/O blocks rely on CANopen or DeviceNet running on CAN. The S912XET256J1MALR offers -40C to +125C headroom and a 50MHz CPU12X capable of running CANopen stacks with PDO mapping. 256KB Flash is sufficient for the protocol stack plus application logic. The 10-bit ADC reads analog sensor inputs and the ECT drives PWMs for proportional valve control. The HCS12X deterministic interrupt response allows industrial-grade timing when the MCU is integrated with EtherCAT or Profibus gateways.
Được đề xuất
Automotive Door Module
Door modules control window, mirror, lock, and speaker functions and typically communicate with the BCM over CAN or LIN. The S912XET256J1MALR with 256KB Flash handles all four functions in a single MCU, and the 16-bit CPU12X core executes window anti-pinch and obstacle detection algorithms with deterministic timing. The 10-bit ADC monitors current draw for stall detection, while the ECT drives the mirror-fold and window motor PWMs. Automotive -40/+125C temperature grade supports the in-door environment. The XGATE co-processor accelerates SPI comms with companion LIN slaves without increasing CPU load.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho S912XET256J1MALR — 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 | S912XET256J1CALR | S912XDT256F1VAA | S912XES384J3VAL | S912XEG384AVAGR | S912XDT384J1MAG |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 112-LQFP (20x20 mm) | 112-LQFP (20x20 mm) - same | 112-LQFP (20x20 mm) - same | 112-LQFP (20x20 mm) - same | 112-LQFP (20x20 mm) - same | 112-LQFP (20x20 mm) - same |
| Core | HCS12X (CPU12X + XGATE) | HCS12X (CPU12X + XGATE) | HCS12D (no XGATE) | HCS12X (CPU12X + XGATE) | HCS12X enhanced (CPU12X + XGATE + extras) | HCS12D (no XGATE) |
| Maximum CPU Clock | 50 MHz | 50 MHz | 25 MHz | 50 MHz | 50 MHz | 25 MHz |
| Flash Memory | 256 KB | 256 KB | 256 KB | 384 KB | 384 KB | 384 KB |
| RAM | 12 KB | 12 KB | 12 KB | 12 KB | 12 KB | 12 KB |
| EEPROM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| Operating Temperature | -40 C to +125 C (Automotive) | -40 C to +85 C (Commercial) | -40 C to +125 C (Automotive) | -40 C to +105 C (Extended) | -40 C to +125 C (Automotive) | -40 C to +125 C (Automotive) |
| CAN Controllers | MSCAN modules (CAN 2.0A/B) | MSCAN modules (CAN 2.0A/B) | MSCAN modules (CAN 2.0A/B) | MSCAN modules (CAN 2.0A/B) | MSCAN modules (CAN 2.0A/B) with enhanced filtering | MSCAN modules (CAN 2.0A/B) |
Bảo phân biệt quan trọng
- 50MHz HCS12X with XGATE co-processor for high-throughput automotive control (vsS912XDT256F1VAA)
- Higher temperature grade -40C to +125C automotive (vsS912XET256J1CALR)
- Larger Flash headroom via same-package S12XE variants (vsS912XES384J3VAL)
- Standard HCS12X peripheral set without XGATE register overhead (vsS912XEG384AVAGR)
Ghi chú thiết kế
The S912XET256J1MALR integrates a 5V-to-2.5V voltage regulator for internal logic. Place a 1uF X7R ceramic bypass as close as possible to the VDDR/VDDX pins and a 4.7uF X5R bulk capacitor on the analog VDDA rail. The VDD1/VDD2 pins each need a 100nF decoupling capacitor with trace length below 5mm. The on-chip voltage regulator can source up to 80mA to external loads; budget headroom for peak ADC and ECT transitions.
The 112-LQFP package has a typical theta_JA of 35 C/W (per NXP S12XE thermal modeling) at 100 LFM airflow on a 4-layer JEDEC JESD51 PCB. The MCU dissipates up to 1.2W under full load (50MHz, all peripherals enabled, CAN activity), leading to a junction temperature rise of about 42C. Ensure that ambient + rise stays within -40C to +125C - automotive underhood applications should plan for case temperatures up to +110C.
Route the EXTAL/XTAL traces between the package and the crystal or resonator inside a guard ground ring, with no signals crossing beneath them. Keep the PLL filter capacitor XFC within 8 mm of the pin and route it over a continuous ground plane. Place the VRH/VRL ADC reference bypass capacitors (typically 100nF X7R each) directly at the pins and isolate them from noisy digital returns. Use star grounding to separate VSSA/VRH/VRL returns from digital VSS for noise-sensitive ADC acquisitions.
Do not leave TEST pin floating - tie TEST to VSS for normal operation or VDDX for factory test. The MODC and BKGD pins require external pull-up or pull-down configuration to select the correct boot mode (Normal Single-Chip, Normal Expanded, or Special BDM). The PADx key-wakeup pins must be properly configured as inputs or wakeup sources, and de-bounced, before they are read by application firmware.
Bus signals (CAN, SPI, SCI, IIC) should be routed with a controlled impedance (typically 50 ohms single-ended) over a continuous reference plane. For MSCAN signals, place a TJA1042 or similar CAN transceiver within 50 mm of the CAN TX and RX pins and add a 120 ohm termination resistor across CANH/CANL on each end of the bus. The ECT PWM outputs can produce sharp edges; clamp them with TVS diodes if exposed to automotive transient loads.
Thông tin tuân thủ
Automotive grade qualified per the part number suffix M (AEC-Q100 grade-1 tested). RoHS/REACH compliance data not provided in the verified web data set - consult the NXP product page for the current formal compliance certificate.
