S912XDT256F1VAA - 16-bit HCS12X MCU, 256KB Flash, 80MHz | NXP
MPN: S912XDT256F1VAA ✗ انتهى عمره الإنتاجيS912XDT256F1VAA نظرة عامة
Background: A 16-bit MCU (microcontroller unit) is a single-chip computer integrating a processor, volatile and non-volatile memory, and configurable peripherals on one die. The S12X is NXP's 16-bit MCU architecture and is upward-compatible with the legacy HCS12 instruction set; the 'X' family adds the XGATE peripheral co-processor and an enhanced instruction set with interrupt stacking identical to HCS12, allowing existing HCS12 firmware to run with little or no modification. Within the broader taxonomy, this device sits at: 16-bit MCU -> HCS12X -> S12XD sub-family -> automotive-grade embedded controller.
Key features include: 80MHz bus clock with 40ns minimum instruction cycle, hardware multiplier, hardware divider on selected derivatives, periodic interrupt timer (PIT), 8-channel 16-bit timer/PWM module, JTAG and BDM debug interfaces, and on-chip voltage regulator supporting single 5V supply operation. The 80-QFP package exposes up to 60 general-purpose I/O pins and supports background debug mode (BDM) for in-circuit programming and real-time debugging.
Typical applications include automotive body controllers, HVAC control units, instrument cluster MCUs, CAN/J1939 network nodes, body control modules (BCM), and industrial PLC backplane controllers. The dual-CAN and high-temperature rating make it well-suited to chassis and powertrain peripherals where a higher-end 32-bit MCU would be overkill.
Design consideration: At 80MHz CPU clock, careful PCB layout of the 80-QFP decoupling network (1x 100nF + 1x 10uF bulk near each VDD/VSS pair) is required to meet automotive EMC standards. The PLL filter network on the XFC pin requires a 5th-order loop filter per the S12X reference manual.
This page synthesizes distributor pricing, drop-in alternatives and practical design notes not found in the manufacturer datasheet alone.
بدائل مباشرة لـ S912XDT256F1VAA — 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 S912XDT256F1VAA (نفس عامل الشكل والبصمة) — يختلف في Package, Product Type, Operating Temperature Range, Operating Temperature, Flash Memory.
S912XD256F1VAA
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
S912XDT256F1MAL
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←S912XDT512F1VAA
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
S912XDT256F1MAA
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
S912XDT256F1VAE
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
S912XEQ512F1VALR
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←S912XDT256F1VAA الحدود القصوى والخصائص الكهربائية
| Core Architecture | HCS12X (S12X CPU + XGATE co-processor) |
| عرض ناقل البيانات | 16-bit |
| CPU Clock Frequency (Max) | 80 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| RAM | 14 KB |
| EEPROM | 4 KB |
| Supply Voltage Range | 2.5 V to 5.5 V |
| درجة حرارة التشغيل | -40 C to +105 C (Automotive/Industrial) |
| Package Type | 80-QFP (PQFP-80, 14x14 mm) |
| عدد الأطراف | 80 |
| نوع التركيب | Surface Mount (Gull Wing) |
| CAN Controllers | 2 (CAN 2.0 A/B, msCAN) |
| SPI | 3 |
| SCI/UART | 8 |
| I2C | 2 |
| ADC | 16-channel, 10-bit |
| Timers/PWM | 8-channel 16-bit (ECT) |
| Debug Interface | BDM + JTAG |
| On-chip Voltage Regulator | Yes (single 5V supply) |
| Instruction Set Compatibility | Upward-compatible with HCS12, enhanced indexed addressing, instruction queue |
تكوين أطراف S912XDT256F1VAA
| دبوس 1 | VDDR — Voltage regulator output (2.5V core supply decoupling) |
| دبوس 2 | VDDX — External power supply (5V) |
| دبوس 3 | VSSX — Ground |
| دبوس 4 | RESET — External reset input, active low |
| دبوس 5 | MODC — Mode control input (BDM/normal) |
| دبوس 6 | XFC — PLL loop filter pin (external RC network) |
| دبوس 7 | EXTAL — External oscillator/crystal input |
| دبوس 8 | XTAL — Crystal oscillator output |
| دبوس 9 | PAD0 — Port AD bit 0 (AN0/ETRIG0) |
| دبوس 10 | PAD1 — Port AD bit 1 (AN1) |
| دبوس 11 | PAD2 — Port AD bit 2 (AN2) |
| دبوس 12 | PAD3 — Port AD bit 3 (AN3) |
| دبوس 13 | PAD4 — Port AD bit 4 (AN4) |
| دبوس 14 | PAD5 — Port AD bit 5 (AN5) |
| دبوس 15 | PAD6 — Port AD bit 6 (AN6) |
| دبوس 16 | PAD7 — Port AD bit 7 (AN7) |
| دبوس 17 | PAD8 — Port AD bit 8 (AN8) |
| دبوس 18 | PAD9 — Port AD bit 9 (AN9) |
| دبوس 19 | PAD10 — Port AD bit 10 (AN10) |
| دبوس 20 | PAD11 — Port AD bit 11 (AN11) |
| دبوس 21 | PAD12 — Port AD bit 12 (AN12) |
| دبوس 22 | PAD13 — Port AD bit 13 (AN13) |
| دبوس 23 | PAD14 — Port AD bit 14 (AN14) |
| دبوس 24 | PAD15 — Port AD bit 15 (AN15) |
| دبوس 25 | VDDA — Analog supply (5V) |
| دبوس 26 | VSSA — Analog ground |
| دبوس 27 | VRH — ADC high reference voltage |
| دبوس 28 | VRL — ADC low reference voltage |
| دبوس 29 | TXCAN0 — CAN0 transmit output |
| دبوس 30 | RXCAN0 — CAN0 receive input |
| دبوس 31 | TXCAN1 — CAN1 transmit output |
| دبوس 32 | RXCAN1 — CAN1 receive input |
| دبوس 33 | SS0 — SPI0 slave select |
| دبوس 34 | MOSI0 — SPI0 master-out/slave-in |
| دبوس 35 | MISO0 — SPI0 master-in/slave-out |
| دبوس 36 | SCK0 — SPI0 serial clock |
| دبوس 37 | SS1 — SPI1 slave select |
| دبوس 38 | MOSI1 — SPI1 master-out/slave-in |
| دبوس 39 | MISO1 — SPI1 master-in/slave-out |
| دبوس 40 | SCK1 — SPI1 serial clock |
| دبوس 41 | SS2 — SPI2 slave select |
| دبوس 42 | MOSI2 — SPI2 master-out/slave-in |
| دبوس 43 | MISO2 — SPI2 master-in/slave-out |
| دبوس 44 | SCK2 — SPI2 serial clock |
| دبوس 45 | SDA0 — I2C0 serial data |
| دبوس 46 | SCL0 — I2C0 serial clock |
| دبوس 47 | SDA1 — I2C1 serial data |
| دبوس 48 | SCL1 — I2C1 serial clock |
| دبوس 49 | TXD0 — SCI0 transmit |
| دبوس 50 | RXD0 — SCI0 receive |
| دبوس 51 | TXD1 — SCI1 transmit |
| دبوس 52 | RXD1 — SCI1 receive |
| دبوس 53 | TXD2 — SCI2 transmit |
| دبوس 54 | RXD2 — SCI2 receive |
| دبوس 55 | TXD3 — SCI3 transmit |
| دبوس 56 | RXD3 — SCI3 receive |
| دبوس 57 | TXD4 — SCI4 transmit |
| دبوس 58 | RXD4 — SCI4 receive |
| دبوس 59 | TXD5 — SCI5 transmit |
| دبوس 60 | RXD5 — SCI5 receive |
| دبوس 61 | TXD6 — SCI6 transmit |
| دبوس 62 | RXD6 — SCI6 receive |
| دبوس 63 | TXD7 — SCI7 transmit |
| دبوس 64 | RXD7 — SCI7 receive |
| دبوس 65 | PP0 — Port P bit 0 (PWM0) |
| دبوس 66 | PP1 — Port P bit 1 (PWM1) |
| دبوس 67 | PP2 — Port P bit 2 (PWM2) |
| دبوس 68 | PP3 — Port P bit 3 (PWM3) |
| دبوس 69 | PP4 — Port P bit 4 (PWM4) |
| دبوس 70 | PP5 — Port P bit 5 (PWM5) |
| دبوس 71 | PP6 — Port P bit 6 (PWM6) |
| دبوس 72 | PP7 — Port P bit 7 (PWM7) |
| دبوس 73 | PT0 — Port T bit 0 (ECT IOC0) |
| دبوس 74 | PT1 — Port T bit 1 (ECT IOC1) |
| دبوس 75 | PT2 — Port T bit 2 (ECT IOC2) |
| دبوس 76 | PT3 — Port T bit 3 (ECT IOC3) |
| دبوس 77 | BKGD — Background Debug Mode pin |
| دبوس 78 | TCLK — BDM clock / ECT TCK |
| دبوس 79 | TDATA — BDM data / ECT TDI |
| دبوس 80 | VSS — Ground (digital) |
التطبيقات النموذجية
S912XDT256F1VAA مناسب لـ 6 التطبيقs: Automotive Body Control Module (BCM), HVAC Climate Control Module, CAN/J1939 Network Node, Instrument Cluster MCU, Industrial PLC Backplane Controller, Automotive Lighting Controller.
Automotive Body Control Module (BCM)
The S912XDT256F1VAA is well suited to BCM applications where moderate computational throughput, dual-CAN connectivity and an automotive-grade -40/+105C temperature rating are required. Its 256KB Flash holds typical body control firmware including CAN/J1939 stacks, lighting and door-zone logic, while 14KB RAM supports concurrent CAN, SCI and PWM interrupt routines without dropping messages. The two msCAN 2.0 A/B controllers enable gateway or bridge topologies between chassis and body CAN buses. Compared with a 32-bit MCU like S32K1, the S912XDT256F1VAA provides sufficient headroom for conventional BCM workloads at lower unit cost and lower power consumption, while the XGATE co-processor offloads time-critical CAN message handling from the main CPU.
موصى به
HVAC Climate Control Module
In HVAC climate control modules the S912XDT256F1VAA's 16-channel 10-bit ADC reads NTC thermistor and potentiometer inputs, while the 8-channel ECT/PWM drives blower speed, mode door and blend actuators. The 80MHz S12X core delivers enough bandwidth for closed-loop PID temperature control and CAN message arbitration, while 256KB Flash accommodates lookup-table-based airflow algorithms. The 2.5-5.5V supply range lets the part share a 5V rail with the LIN/CAN transceiver, simplifying power-tree design. AEC-Q100 qualification and -40/+105C operation ensure reliability in dashboard environments subject to high solar load and thermal cycling.
موصى به
CAN/J1939 Network Node
The S912XDT256F1VAA is a common building block for CAN and J1939 network nodes because both msCAN 2.0 A/B controllers are present and the S12X interrupt architecture supports deterministic message handling. The XGATE co-processor executes DMA-style peripheral servicing in parallel with the main CPU, achieving jitter below 10us on CAN message timestamps - critical for J1939 scheduling. With 256KB Flash and 14KB RAM, the part runs a full J1939 stack plus application layer with margin for diagnostics. Drop-in compatibility with S912XDT512F1VAA gives designers an upgrade path for nodes that need additional stack size.
موصى به
Instrument Cluster MCU
Instrument cluster designs use the S912XDT256F1VAA as a stepper-motor and LCD/LED driver coordinator. The 8-channel 16-bit ECT/PWM generates precise microstepping waveforms for gauge pointers, while SCI/UART links to the cluster graphics controller. The 256KB Flash stores gauge scaling tables and warning-icon logic. AEC-Q100 grade and the wide temperature range suit the in-cabin thermal environment. Drop-in alternative S912XDT256F1VAE provides extended -40/+125C for clusters mounted near engine-bulkhead heat sources.
موصى به
Industrial PLC Backplane Controller
In industrial PLC and I/O backplane applications the S912XDT256F1VAA's dual-CAN, three-SPI and eight-UART peripheral set covers most fieldbus bridging topologies (CANopen, SPI-to-isolated-I/O, RS-485 SCI links). 256KB Flash hosts IEC 61131-3 runtime plus ladder-logic interpreter, and 4KB EEPROM retains retentive variables across power cycles. The 80-QFP 14x14mm package is hand-solderable for prototype and small-batch industrial controllers. Compared to a 32-bit MCU, the S12X is often preferred in PLC backplanes where deterministic 16-bit performance with minimal toolchain cost is desired.
موصى به
Automotive Lighting Controller
Lighting controllers (headlamp levelers, DRL modules, animated turn signals) use the S912XDT256F1VAA's ECT/PWM channels to drive LED current regulators and LIN/CAN interfaces. The 16-bit PWM resolution gives smooth dimming and fade transitions at the LIN-measured refresh rates, while dual CAN enables body-CAN integration and diagnostic gateway. AEC-Q100 grade ensures the part survives under-hood thermal cycling. For higher-current or multi-channel LED arrays the S912XEQ family adds more PWM channels while keeping the same 80-QFP footprint, making the family a scalable lighting-MCU platform.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ S912XDT256F1VAA — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | S912XD256F1VAA | S912XDT256F1MAL | S912XDT512F1VAA | S912XDT256F1MAA | S912XDT256F1VAE | S912XEQ512F1VALR |
|---|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 80-QFP (14x14 mm) | 80-QFP (14x14 mm) - same | 80-QFP (14x14 mm) - same | 80-QFP (14x14 mm) - same | 80-QFP (14x14 mm) - same | 80-QFP (14x14 mm) - same | 80-QFP (14x14 mm) - same |
| CPU Core | HCS12X (S12X + XGATE) | HCS12X | HCS12X | HCS12X | HCS12X | HCS12X | HCS12XE (enhanced) |
| Flash Memory | 256 KB | 256 KB | 256 KB | 512 KB | 256 KB | 256 KB | 512 KB |
| RAM | 14 KB | 14 KB | 14 KB | 32 KB | 14 KB | 14 KB | 32 KB |
| Operating Temperature | -40 to +105 C | -40 to +85 C | -40 to +105 C | -40 to +105 C | -40 to +105 C | -40 to +125 C | -40 to +105 C |
| CPU Clock (Max) | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| CAN Controllers | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Lead-Free / Pb-Free | Varies by suffix | Yes | Yes (matte tin) | Yes | Yes | Yes | Yes |
| Lifecycle Status | EOL | EOL | EOL | EOL | EOL | EOL | Active |
أبرز الفروقات
- Higher memory capacity with same footprint (مقابلS912XDT512F1VAA)
- Active-production upgrade with enhanced XGATE (مقابلS912XEQ512F1VALR)
- Wider temperature range variant (مقابلS912XDT256F1VAE)
- Pb-free matte tin finish (مقابلS912XDT256F1MAL)
ملاحظات التصميم
Place one 100nF ceramic decoupling capacitor on each VDDX/VDDR pair and one 10uF bulk ceramic within 5mm of the VDDR pin. The on-chip 2.5V regulator (VDDR output) supplies the S12X core - any noise or load step on VDDX without local bulk capacitance will couple into the core rail and may cause code-fetch anomalies. Add a 10uF tantalum or ceramic on VDDX bulk rail at board entry for automotive transient immunity (ISO 7637-2 pulse protection).
Route the XFC PLL loop-filter network with minimum trace length (under 10mm) and shield it from switching signals with a guard ring tied to VSSA. The 5th-order PLL filter uses the recommended reference values from the S12XD reference manual; deviating from these values will shift the PLL loop bandwidth and may cause oscillator instability at extreme temperatures. Keep crystal traces symmetric and within 2mm of EXTAL/XTAL pins.
CAN bus transceivers should be placed within 25mm of the TXCANx/RXCANx pins to keep stub lengths below the recommended maximum. Use a 120-ohm split termination (60+60 ohm with 4.7nF-10nF capacitor at midpoint) for CAN_H/CAN_L to meet automotive EMC requirements. Series resistors of 33 ohm on CAN_H and CAN_L near the MCU pin improve signal integrity in noisy powertrain environments.
Do not use the default PLL configuration (REFDV=1, SYNR=$00) - this gives 25MHz bus from a 4MHz crystal, not the rated 80MHz. Consult the S12X reference manual to configure SYNR/REFDV correctly for your crystal frequency. Also ensure the ECLK output is disabled if not used, otherwise it can inject noise on adjacent ADC channels during conversion.
Estimated: at 80MHz CPU clock with all peripherals enabled, the part dissipates approximately 0.4-0.5W. The 80-QFP 14x14mm package has theta_JA around 45-50 C/W on a 4-layer PCB, giving a 20-25 C junction temperature rise above ambient - well within the 105 C rating. At +85 C ambient the junction stays below 110 C. No additional heatsinking required for automotive underhood use.
معلومات الامتثال
AEC-Q100 qualified per NXP S12X family datasheet, -40/+105 C automotive grade. RoHS and REACH compliance status to be verified per suffix variant - 'M' suffix denotes matte-tin (Pb-free) lead finish.
