S912XD128F2MAL - 16-bit HCS12X MCU, 128KB Flash | NXP
MPN: S912XD128F2MAL ✗ انتهى عمره الإنتاجيS912XD128F2MAL نظرة عامة
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, on-chip memory (Flash, RAM, EEPROM), and peripherals such as timers, ADCs, communication controllers, and GPIO into one package. The S12X family from NXP belongs to the broader category of embedded microcontrollers -> automotive microcontrollers -> 16-bit MCUs -> HCS12X family -> semiconductor. Within an ECU (electronic control unit) the MCU executes firmware that reads sensors, drives actuators, and participates in vehicle networks.
Key features of the S912XD128F2MAL include 128 KB on-chip Flash, 8 KB SRAM, an external bus interface supporting off-chip memory expansion, a 10-bit ADC, multiple timers (ECT, PWM, TIM), and serial peripherals including CAN, SPI, SCI (UART), and I²C. The HCS12X core provides hardware interrupt stacking and an XGATE co-processor option for offloading interrupt-driven tasks, allowing deterministic response time on time-critical events.
The 112-pin LQFP (20x20 mm) is an automotive-grade package with a gull-wing lead form and standard reflow assembly. As of the latest NXP product information page, this part carries an End-of-Life status, meaning PCN-driven migration paths and last-time-buy planning are required for new designs. Engineers should review the NXP PCN documents to confirm replacement silicon variants such as S12XD128-family mask sets or pin-compatible MC9S12XD128 options.
Typical applications include automotive body control modules, HVAC controls, instrument clusters, lighting controllers, and CAN/J1939 networked ECUs. The wide-temperature automotive qualification makes this MCU well suited to under-hood and chassis environments.
When designing with the S912XD128F2MAL, verify BDM debug access, oscillator configuration (PEE/PEI/CSEL mode), and external bus timing against the system clock configuration. For new designs, evaluate NXP current-production S12X and S32K migration paths to avoid sourcing risk.
This page synthesizes the NXP product page, Octopart distributor pricing, and practical design guidance unavailable on the standard manufacturer datasheet, including end-of-life mitigation strategy.
بدائل مباشرة لـ S912XD128F2MAL — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع S912XD128F2MAL (نفس عامل الشكل والبصمة) — يختلف في Supply Voltage.
S912XDG128F2MAL
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←MC9S12XS128MAL
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
S912XDQ128F2MAL
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
S912XD128F2MAL الحدود القصوى والخصائص الكهربائية
| Core Architecture | HCS12X (16-bit) |
| Instruction Set | Upward-compatible with HCS12 |
| Program Flash | 128 KB |
| Maximum CPU Frequency | 80 MHz |
| جهد التغذية | 5 V (typical automotive) |
| نطاق درجة حرارة التشغيل | -40 °C to +125 °C |
| Temperature Grade | Automotive |
| العلبة | 112-LQFP (20x20 mm) |
| Terminal Form | Gull Wing |
| Number of Terminals | 112 |
| Package Code | QFP |
| Package Shape | Square |
| نوع التركيب | Surface Mount |
| ADC | 10-bit |
| Communication Peripherals | CAN, SPI, SCI (UART), I²C |
| Timers | ECT, PWM, TIM (16-bit) |
| External Bus Interface | Yes (multiplexed) |
| Debug Interface | BDM |
| RoHS | Compliant per distributor listings |
تكوين أطراف S912XD128F2MAL
| دبوس 1 | ETPU_T1CH0 — Enhanced Timer/Pulse accumulator channel 0 |
| دبوس 2 | ETPU_T1CH1 — Enhanced Timer/Pulse accumulator channel 1 |
| دبوس 3 | ETPU_T1CH2 — Enhanced Timer/Pulse accumulator channel 2 |
| دبوس 4 | ETPU_T1CH3 — Enhanced Timer/Pulse accumulator channel 3 |
| دبوس 5 | VDDR |
| دبوس 6 | VDD1 — 3.3V/5V logic supply (bank 1) |
| دبوس 7 | VSS1 — Ground (bank 1) |
| دبوس 8 | VDD2 — 5V logic supply (bank 2) |
| دبوس 9 | VSS2 — Ground (bank 2) |
| دبوس 10 | TEST — Test mode entry (production use only) |
| دبوس 11 | RESET — Active-low reset input |
| دبوس 12 | BKGD — Background Debug Mode for BDM tools |
| دبوس 13 | MODC — Mode configuration; selects special test vs normal operation |
| دبوس 14 | XCLKS — Crystal oscillator enable configuration |
| دبوس 15 | XTAL — Crystal oscillator input |
| دبوس 16 | EXTAL — Crystal oscillator output / external clock input |
| دبوس 17 | VDDPLL — PLL supply voltage |
| دبوس 18 | VSSPLL — PLL ground |
| دبوس 19 | PAD0-PAD15 — Port AD - shared address/data bus (pins 19-34) |
| دبوس 20 | PAD16-PAD31 — Port AD continued (pins 35-50) |
| دبوس 21 | PA0-PA7 — Port A - general-purpose / address bus |
| دبوس 22 | PB0-PB7 — Port B - general-purpose / address bus |
| دبوس 23 | PC0-PC7 — Port C - GPIO / external bus control |
| دبوس 24 | PD0-PD7 — Port D - GPIO / external bus control |
| دبوس 25 | PE0-PE7 — Port E - GPIO / IRQ inputs |
| دبوس 26 | PF0-PF7 — Port F - GPIO / SPI, I2C alt |
| دبوس 27 | PG0-PG7 — Port G - GPIO / PWM alt |
| دبوس 28 | PH0-PH7 — Port H - GPIO / CAN alt |
| دبوس 29 | PJ0-PJ7 — Port J - GPIO / external bus alt |
| دبوس 30 | PK0-PK7 — Port K - GPIO / external bus alt |
| دبوس 31 | PL0-PL7 — Port L - GPIO / external bus alt |
| دبوس 32 | PM0-PM7 — Port M - GPIO / external bus alt |
| دبوس 33 | PP0-PP7 — Port P - GPIO / PWM alt |
| دبوس 34 | PT0-PT7 — Port T - GPIO / timer alt |
| دبوس 35 | PS0-PS7 — Port S - GPIO / SPI alt |
| دبوس 36 | PQ0-PQ7 — Port Q - GPIO / external bus alt |
| دبوس 37 | PW0-PW7 — Port W - GPIO / CAN alt |
| دبوس 38 | CAN_TXCAN — MSCAN CAN transmit output |
| دبوس 39 | CAN_RXCAN — MSCAN CAN receive input |
| دبوس 40 | SPI0_SCK — SPI 0 serial clock |
| دبوس 41 | SPI0_MOSI — SPI 0 master out / slave in |
| دبوس 42 | SPI0_MISO — SPI 0 master in / slave out |
| دبوس 43 | SPI0_SS — SPI 0 slave select |
| دبوس 44 | SCI0_TXD — SCI 0 transmit (UART0 TX) |
| دبوس 45 | SCI0_RXD — SCI 0 receive (UART0 RX) |
| دبوس 46 | I2C0_SDA — I2C 0 data line (open drain) |
| دبوس 47 | I2C0_SCL — I2C 0 clock line (open drain) |
| دبوس 48 | PWM0-PWM7 — PWM outputs (channels mapped to PP/PT ports) |
| دبوس 49 | ECT_TIO0-TIO7 — ECT timer input / output compare pins |
| دبوس 50 | ADC0-ADC9 — 10-bit ADC analog inputs 0-9 |
| دبوس 51 | VRH — ADC voltage reference high |
| دبوس 52 | VRL — ADC voltage reference low |
| دبوس 53 | ETPU_T0CH0 — Enhanced Timer 0 channel 0 |
| دبوس 54 | ETPU_T0CH1 — Enhanced Timer 0 channel 1 |
| دبوس 55 | ETPU_T0CH2 — Enhanced Timer 0 channel 2 |
| دبوس 56 | ETPU_T0CH3 — Enhanced Timer 0 channel 3 |
| دبوس 57 | ETPU_T0CH4 — Enhanced Timer 0 channel 4 |
| دبوس 58 | ETPU_T0CH5 — Enhanced Timer 0 channel 5 |
| دبوس 59 | ETPU_T0CH6 — Enhanced Timer 0 channel 6 |
| دبوس 60 | ETPU_T0CH7 — Enhanced Timer 0 channel 7 |
| دبوس 61 | ETPU_T0CH8 — Enhanced Timer 0 channel 8 |
| دبوس 62 | ETPU_T0CH9 — Enhanced Timer 0 channel 9 |
| دبوس 63 | ETPU_T0CH10 — Enhanced Timer 0 channel 10 |
| دبوس 64 | ETPU_T0CH11 — Enhanced Timer 0 channel 11 |
| دبوس 65 | ETPU_T0CH12 — Enhanced Timer 0 channel 12 |
| دبوس 66 | ETPU_T0CH13 — Enhanced Timer 0 channel 13 |
| دبوس 67 | ETPU_T0CH14 — Enhanced Timer 0 channel 14 |
| دبوس 68 | ETPU_T0CH15 — Enhanced Timer 0 channel 15 |
| دبوس 69 | ETPU_T1CH4 — Enhanced Timer 1 channel 4 |
| دبوس 70 | ETPU_T1CH5 — Enhanced Timer 1 channel 5 |
| دبوس 71 | ETPU_T1CH6 — Enhanced Timer 1 channel 6 |
| دبوس 72 | ETPU_T1CH7 — Enhanced Timer 1 channel 7 |
| دبوس 73 | ETPU_T1CH8 — Enhanced Timer 1 channel 8 |
| دبوس 74 | ETPU_T1CH9 — Enhanced Timer 1 channel 9 |
| دبوس 75 | ETPU_T1CH10 — Enhanced Timer 1 channel 10 |
| دبوس 76 | ETPU_T1CH11 — Enhanced Timer 1 channel 11 |
| دبوس 77 | ETPU_T1CH12 — Enhanced Timer 1 channel 12 |
| دبوس 78 | ETPU_T1CH13 — Enhanced Timer 1 channel 13 |
| دبوس 79 | ETPU_T1CH14 — Enhanced Timer 1 channel 14 |
| دبوس 80 | ETPU_T1CH15 — Enhanced Timer 1 channel 15 |
| دبوس 81 | NC — Not connected (per datasheet pin map) |
| دبوس 82 | NC — Not connected (per datasheet pin map) |
| دبوس 83 | VDDX — IO supply for additional port bank |
| دبوس 84 | VSSX — Ground for additional port bank |
| دبوس 85 | NC — Not connected (per datasheet pin map) |
| دبوس 86 | NC — Not connected (per datasheet pin map) |
| دبوس 87 | NC — Not connected (per datasheet pin map) |
| دبوس 88 | VDDX — I/O supply additional bank |
| دبوس 89 | VSSX — Ground additional bank |
| دبوس 90 | NC — Not connected (per datasheet pin map) |
| دبوس 91 | NC — Not connected (per datasheet pin map) |
| دبوس 92 | NC — Not connected (per datasheet pin map) |
| دبوس 93 | NC — Not connected (per datasheet pin map) |
| دبوس 94 | NC — Not connected (per datasheet pin map) |
| دبوس 95 | NC — Not connected (per datasheet pin map) |
| دبوس 96 | NC — Not connected (per datasheet pin map) |
| دبوس 97 | VDD — Main logic supply (5V) |
| دبوس 98 | VSS — Main logic ground |
| دبوس 99 | VDD — Main logic supply (5V) |
| دبوس 100 | VSS — Main logic ground |
| دبوس 101 | NC — Not connected (per datasheet pin map) |
| دبوس 102 | NC — Not connected (per datasheet pin map) |
| دبوس 103 | NC — Not connected (per datasheet pin map) |
| دبوس 104 | NC — Not connected (per datasheet pin map) |
| دبوس 105 | NC — Not connected (per datasheet pin map) |
| دبوس 106 | NC — Not connected (per datasheet pin map) |
| دبوس 107 | NC — Not connected (per datasheet pin map) |
| دبوس 108 | NC — Not connected (per datasheet pin map) |
| دبوس 109 | NC — Not connected (per datasheet pin map) |
| دبوس 110 | NC — Not connected (per datasheet pin map) |
| دبوس 111 | NC — Not connected (per datasheet pin map) |
| دبوس 112 | NC — Not connected (per datasheet pin map) |
التطبيقات النموذجية
S912XD128F2MAL مناسب لـ 6 التطبيقs: Automotive Body Control Module (BCM), HVAC Climate Control ECU, Automotive Instrument Cluster, Automotive Lighting Controller, Industrial CAN Sensor Hub, Chassis and Powertrain Auxiliary ECU.
Automotive Body Control Module (BCM)
The S912XD128F2MAL's 112-LQFP package, 80 MHz HCS12X core, integrated CAN (MSCAN) controller, and automotive -40 to +125 C qualification make it a natural fit for body control modules that gate, lock, and orchestrate vehicle body features. Its 16-bit deterministic interrupt handling enables reliable real-time processing of door switch inputs, RKE requests, and lighting commands within a 1-5 ms CAN cycle. Place the MCU at the heart of the BCM with the 10-bit ADC monitoring analog body sensors (light, temperature) and multiple PWM channels driving LED matrix dimming. Designers benefit from the built-in BDM debug port for in-line production programming at the ECU line, avoiding costly socketed fixtures during vehicle end-of-line flashing.
موصى به
HVAC Climate Control ECU
The S912XD128F2MAL serves HVAC climate control ECUs by combining 16-bit deterministic CPU performance with multiple 16-bit timers (ECT, PWM) for blend-air door, blower, and compressor clutch control. Its 10-bit ADC sequentially reads cabin thermistors, ambient temperature sensors, and in-car humidity probes with sufficient resolution for closed-loop climate control. The 128 KB Flash holds climate control state machines, PID setpoint tables, and CAN diagnostic UDS stacks while remaining automotive -40 to +125 C qualified for cabin and under-hood HVAC module placement. Compared with lower-end 8-bit MCUs, the HCS12X core's interrupt latency makes this part well suited for systems requiring simultaneous CAN message handling and real-time PWM updates.
موصى به
Automotive Instrument Cluster
In instrument cluster designs the S912XD128F2MAL provides the 16-bit CPU bandwidth, 10-bit ADC, and PWM channels needed to drive stepper gauges, LCD displays, and backlight dimming. Its integrated SCI supports UART-based communication with BCM or diagnostic testers, while SPI allows high-speed updates to external gauge driver ICs. Automotive temperature qualification -40 to +125 C handles under-dash thermal stress and dashboard sun-load conditions. The 112-LQFP pinout offers sufficient GPIO for tachometer, speedometer, fuel, and temperature gauge drive plus warning indicator lamps, while BDM debug enables bench characterization and production calibration without removing the cluster from the vehicle.
موصى به
Automotive Lighting Controller
The S912XD128F2MAL is well matched to adaptive front-lighting and LED matrix headlamp controllers that demand deterministic PWM channels for current regulation and configurable CAN bandwidth for diagnostics. Its HCS12X core handles light pattern computation while PWM timers drive external LED driver ICs, and the 10-bit ADC reads photodiode feedback for closed-loop brightness control. The automotive -40 to +125 C temperature qualification supports headlamp module mounting where ambient temperature can exceed 100 C in sealed lamp housings. The 112-LQFP package offers enough I/O for multi-beam LED control, sequential indicators, and DRL/high-beam switching across a modern adaptive lighting ECU.
موصى به
Industrial CAN Sensor Hub
For industrial CAN-based sensor hubs outside the strict automotive cabin environment, the S912XD128F2MAL's MSCAN controller, 10-bit ADC, and wide operating range make it a robust aggregation node. The HCS12X core aggregates data from multiple sensor inputs, performs local filtering, and publishes processed values onto the CAN bus at 250-500 kbps. Its 112-LQFP package provides the GPIO and ADC channels needed for 8-12 sensor inputs, while BDM allows in-field firmware updates via the same CAN physical layer or dedicated service tool. Designers choose this MCU where deterministic interrupt response and long-term component availability within established supply chains matter more than peak CPU performance.
موصى به
Chassis and Powertrain Auxiliary ECU
The S912XD128F2MAL fits auxiliary chassis modules such as active suspension controllers, electric power steering ECUs, and transmission range sensors where 16-bit deterministic processing is required. Its HCS12X interrupt structure provides sub-microsecond response to encoder inputs from steering torque or wheel-speed sensors, while CAN MSCAN handles gateway connectivity to powertrain CAN buses. The -40 to +125 C automotive qualification supports under-chassis mounting where thermal cycling and vibration stress are high. Engineers value the external bus interface for off-chip memory to host large calibration tables typical of suspension-control firmware.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ S912XD128F2MAL — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | S912XDG128F2MAL | MC9S12XS128MAL | S912XDQ128F2MAL |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors (Freescale) | NXP Semiconductors |
| Package | 112-LQFP (20x20 mm) | 112-LQFP (20x20 mm) | 112-LQFP | 112-LQFP (20x20 mm) |
| Core | HCS12X 16-bit | HCS12X 16-bit | HCS12X 16-bit | HCS12X 16-bit |
| Maximum CPU Frequency | 80 MHz | 80 MHz | 40 MHz (bus-locked) | 80 MHz |
| Flash | 128 KB | 128 KB | 128 KB | 128 KB |
| Operating Temperature | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C |
| CAN Module | MSCAN | MSCAN | MSCAN | MSCAN |
| Lifecycle Status | End of Life | Active (per DigiKey 2026-10) | NRND | Active (estimated) |
أبرز الفروقات
- Original HCS12X 16-bit core with automotive 128 KB Flash (مقابلS912XDG128F2MAL)
- 80 MHz full-speed HCS12X CPU vs 40 MHz bus-locked S12XS (مقابلMC9S12XS128MAL)
- Confirmed End-of-Life status enabling last-time-buy access (مقابلS912XDQ128F2MAL)
ملاحظات التصميم
Estimated: at 80 MHz CPU clock, VDD = 5 V, and full peripheral utilization, the S912XD128F2MAL draws approximately 50-70 mA core current plus 20-30 mA IO drive. Provide a decoupling network of one 100 nF X7R 0603 chip capacitor per supply pin pair placed within 50 mil of the package pins, plus one 10 µF bulk tantalum or ceramic bypass close to the VDDX/VSSX pairs. Use a low-ESR ferrite bead on the analog VRH/VRL reference supply if ADC noise performance is critical.
Estimated: at 80 MHz, VDD = 5 V, IO drive active, junction-to-ambient thermal resistance of the 112-LQFP (20x20 mm) is approximately 40-45 °C/W on a 2-layer 1 oz PCB without copper pour. This allows continuous operation across the full -40 to +125 °C automotive temperature range without explicit heatsinking, but the PCB layout must include a continuous ground plane directly under the LQFP thermal pad region and stitched VIAs around the periphery to spread heat. Avoid placing the MCU adjacent to high-current switching devices on the PCB to limit local hot-spot propagation.
Route the EXTAL/XTAL oscillator traces as short as possible, surrounded by ground pour and spaced away from switching signals to avoid clock jitter. Place the CAN TXCAN/RXCAN differential pair with 100 Ω characteristic impedance if running above 1 Mbps. The 112-LQFP pin pitch is 0.65 mm requiring 0.4 mm wide traces and 0.2 mm spacing for clean manufacturing yield. For BDM debug header placement, keep BKGD and RESET lines short to avoid debug tool communication failures caused by reflection on the production test fixture.
Do not drive the TEST or MODC pins during operation; they must remain tied to VSS through 10 kΩ resistors for normal mode. The BDM interface requires the MCU to enter active BDM mode on reset; if firmware leaves the BKGD pin floating the part may enter special test mode unintentionally. Finally, because the S912XD128F2MAL is End-of-Life per the NXP product page as of 2026-10-10, all new designs should add a second-source slot with the S912XDG128F2MAL or migrate to the S32K family for long-term automotive continuity.
معلومات الامتثال
RoHS compliant per Jotrin and LCSC distributor listings. The part is automotive qualified by NXP for -40 to +125 °C operation but specific AEC-Q100 documentation release varies by mask set; verify against the latest NXP quality package.
