S912XHZ256F1VAG - 16-bit MCU, S12X, 256KB Flash, 80MHz | NXP
MPN: S912XHZ256F1VAG ✓ Hoạt độngS912XHZ256F1VAG Tóm tắt
An automotive microcontroller (MCU) is a microprocessor optimized for vehicle applications, integrating CPU, memory, timers, ADC, communication controllers (CAN, LIN, SPI, SCI), and increasingly LCD/TFT display drivers on a single die. Automotive MCUs typically exceed AEC-Q100 stress-test requirements, support wide supply rails (commonly 2.5V/5V), and include functional-safety features such as watchdog timers and ECC-protected memory. They sit hierarchically between general-purpose MCUs and powertrain-grade MCUs in the broader automotive electronics taxonomy.
Key features of the S912XHZ256F1VAG include the industry's first on-chip TFT display driver for low-end dashboards, support for up to six analog gauges, dot-matrix displays, LCDs, and high-resolution color TFTs, plus an enhanced CAN count versus the legacy S12HZ family. Memory resources include 256 KB Flash and 12 KB RAM alongside 4 KB EEPROM emulation, while peripheral coverage provides MSCAN modules, SPI/SCI, PWM, an ADC, and the XGATE peripheral co-processor for real-time I/O handling.
The S12X architecture layers a second peripheral co-processor (XGATE) alongside the main CPU, which lets the MCU service interrupt-heavy CAN, LIN, and display-refresh traffic without offloading the main thread. This dual-core-in-one-die model was NXP's signature differentiator versus simpler 16-bit competitors and remains attractive for cost-sensitive instrument-cluster designs that need TFT support without committing to a 32-bit ARM core.
Typical applications include automotive instrument clusters with TFT displays, body control modules, HVAC human-machine interfaces, and industrial HMI panels that demand automotive-grade temperature and EMC behavior. Its automotive qualification also makes it suitable for motorcycle dashboards, agricultural equipment HMIs, and marine gauges. Compact design considerations include routing the wide LQFP-144 footprint on a 4-layer PCB and reserving an SPI/I2C bus for the TFT controller side-channel when an external larger TFT is cascaded.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, helping procurement and design engineers evaluate the S912XHZ256F1VAG for both new designs and field-replacement scenarios.
Bộ thay thế dễ dàng lắp đặt cho S912XHZ256F1VAG — 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 S912XHZ256F1VAG (cùng hình factor và footprint) — khác nhau ở Package, Operating Temperature, Core Architecture, Program Memory (Flash), RAM.
S912XHZ256F1VAGR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
S912XHZ512F1VAG
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC9S12XHZ256VAG
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →S912XHZ384F1VAG
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
S912XEQ384F1VAG
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
S912XHZ256F1VAG Tỷ lệ tối đa & tính chất điện
| Core | HCS12X (S12X) with XGATE coprocessor |
| Bề rộng đường dữ liệu | 16-bit |
| Program Memory Size | 256 KB (256K x 8) Flash |
| RAM Size | 12 KB |
| EEPROM (emulated) | 4 KB |
| Maximum CPU Clock | 80 MHz |
| Điện áp cung cấp | 2.5 V / 5 V |
| Nhiệt độ hoạt động | -40C to +105C |
| Hộp | 144-LQFP (20x20 mm) |
| Kiểu lắp đặt | Surface Mount |
| Số chân | 144 |
| Display Capability | On-chip TFT driver (up to 6 gauges, color TFT) |
| CAN Modules | Multiple MSCAN channels |
| AEC-Q100 | Automotive qualified |
| Trạng thái RoHS | Compliant |
Cấu hình chân S912XHZ256F1VAG
| Chân 1 | VSS — Ground reference |
| Chân 2 | VDDR — Voltage regulator supply |
| Chân 3 | VDDX — External supply (5V/3.3V) |
| Chân 4 | RESET — External reset input, active low |
| Chân 5 | MODC — Mode control |
| Chân 6 | BKGD — Background debug mode |
| Chân 7 | XTAL — Crystal oscillator input |
| Chân 8 | EXTAL — Crystal oscillator output |
| Chân 9 | VSS — Ground |
| Chân 10 | PAD0 — Port AD bit 0 / ATD input |
| Chân 11 | PAD1 — Port AD bit 1 / ATD input |
| Chân 12 | PAD2 — Port AD bit 2 / ATD input |
| Chân 13 | PAD3 — Port AD bit 3 / ATD input |
| Chân 14 | PAD4 — Port AD bit 4 / ATD input |
| Chân 15 | PAD5 — Port AD bit 5 / ATD input |
| Chân 16 | PAD6 — Port AD bit 6 / ATD input |
| Chân 17 | PAD7 — Port AD bit 7 / ATD input |
| Chân 18 | PAD8 — Port AD bit 8 / ATD input |
| Chân 19 | PAD9 — Port AD bit 9 / ATD input |
| Chân 20 | PAD10 — Port AD bit 10 / ATD input |
| Chân 21 | PAD11 — Port AD bit 11 / ATD input |
| Chân 22 | PAD12 — Port AD bit 12 / ATD input |
| Chân 23 | PAD13 — Port AD bit 13 / ATD input |
| Chân 24 | PAD14 — Port AD bit 14 / ATD input |
| Chân 25 | PAD15 — Port AD bit 15 / ATD input |
| Chân 26 | VRH — ATD reference high |
| Chân 27 | VRL — ATD reference low |
| Chân 28 | VDDA — ATD supply |
| Chân 29 | VSSA — ATD ground |
| Chân 30 | PS0 — Port S bit 0 |
| Chân 31 | PS1 — Port S bit 1 |
| Chân 32 | PS2 — Port S bit 2 |
| Chân 33 | PS3 — Port S bit 3 |
| Chân 34 | PS4 — Port S bit 4 |
| Chân 35 | PS5 — Port S bit 5 |
| Chân 36 | PS6 — Port S bit 6 |
| Chân 37 | PS7 — Port S bit 7 |
| Chân 38 | PT0 — Port T bit 0 (timer) |
| Chân 39 | PT1 — Port T bit 1 (timer) |
| Chân 40 | PT2 — Port T bit 2 (timer) |
| Chân 41 | PT3 — Port T bit 3 (timer) |
| Chân 42 | PT4 — Port T bit 4 (timer) |
| Chân 43 | PT5 — Port T bit 5 (timer) |
| Chân 44 | PT6 — Port T bit 6 (timer) |
| Chân 45 | PT7 — Port T bit 7 (timer) |
| Chân 46 | PE0 — Port E bit 0 / IRQ |
| Chân 47 | PE1 — Port E bit 1 / IRQ |
| Chân 48 | PE2 — Port E bit 2 / XIRQ |
| Chân 49 | PE3 — Port E bit 3 |
| Chân 50 | PE4 — Port E bit 4 / SCI |
| Chân 51 | PE5 — Port E bit 5 / SCI |
| Chân 52 | PE6 — Port E bit 6 / SPI |
| Chân 53 | PE7 — Port E bit 7 / SPI |
| Chân 54 | VSS — Ground |
| Chân 55 | VDDX — External supply |
| Chân 56 | PJ0 — Port J bit 0 (CAN0) |
| Chân 57 | PJ1 — Port J bit 1 (CAN0) |
| Chân 58 | PJ2 — Port J bit 2 |
| Chân 59 | PJ3 — Port J bit 3 |
| Chân 60 | PJ4 — Port J bit 4 |
| Chân 61 | PJ5 — Port J bit 5 |
| Chân 62 | PJ6 — Port J bit 6 |
| Chân 63 | PJ7 — Port J bit 7 |
| Chân 64 | PK0 — Port K bit 0 |
| Chân 65 | PK1 — Port K bit 1 |
| Chân 66 | PK2 — Port K bit 2 |
| Chân 67 | PK3 — Port K bit 3 |
| Chân 68 | PK4 — Port K bit 4 |
| Chân 69 | PK5 — Port K bit 5 |
| Chân 70 | PK6 — Port K bit 6 |
| Chân 71 | PK7 — Port K bit 7 |
| Chân 72 | PM0 — Port M bit 0 (TFT/LCD) |
| Chân 73 | PM1 — Port M bit 1 (TFT/LCD) |
| Chân 74 | PM2 — Port M bit 2 (TFT/LCD) |
| Chân 75 | PM3 — Port M bit 3 (TFT/LCD) |
| Chân 76 | PM4 — Port M bit 4 (TFT/LCD) |
| Chân 77 | PM5 — Port M bit 5 (TFT/LCD) |
| Chân 78 | PM6 — Port M bit 6 (TFT/LCD) |
| Chân 79 | PM7 — Port M bit 7 (TFT/LCD) |
| Chân 80 | PN0 — Port N bit 0 (TFT/LCD) |
| Chân 81 | PN1 — Port N bit 1 (TFT/LCD) |
| Chân 82 | PN2 — Port N bit 2 (TFT/LCD) |
| Chân 83 | PN3 — Port N bit 3 (TFT/LCD) |
| Chân 84 | PN4 — Port N bit 4 (TFT/LCD) |
| Chân 85 | PN5 — Port N bit 5 (TFT/LCD) |
| Chân 86 | PN6 — Port N bit 6 (TFT/LCD) |
| Chân 87 | PN7 — Port N bit 7 (TFT/LCD) |
| Chân 88 | PP0 — Port P bit 0 (PWM) |
| Chân 89 | PP1 — Port P bit 1 (PWM) |
| Chân 90 | PP2 — Port P bit 2 (PWM) |
| Chân 91 | PP3 — Port P bit 3 (PWM) |
| Chân 92 | PP4 — Port P bit 4 (PWM) |
| Chân 93 | PP5 — Port P bit 5 (PWM) |
| Chân 94 | PP6 — Port P bit 6 (PWM) |
| Chân 95 | PP7 — Port P bit 7 (PWM) |
| Chân 96 | PQ0 — Port Q bit 0 |
| Chân 97 | PQ1 — Port Q bit 1 |
| Chân 98 | PQ2 — Port Q bit 2 |
| Chân 99 | PQ3 — Port Q bit 3 |
| Chân 100 | PQ4 — Port Q bit 4 |
| Chân 101 | PQ5 — Port Q bit 5 |
| Chân 102 | PQ6 — Port Q bit 6 |
| Chân 103 | PQ7 — Port Q bit 7 |
| Chân 104 | PR0 — Port R bit 0 |
| Chân 105 | PR1 — Port R bit 1 |
| Chân 106 | PR2 — Port R bit 2 |
| Chân 107 | PR3 — Port R bit 3 |
| Chân 108 | PR4 — Port R bit 4 |
| Chân 109 | PR5 — Port R bit 5 |
| Chân 110 | PR6 — Port R bit 6 |
| Chân 111 | PR7 — Port R bit 7 |
| Chân 112 | VSS — Ground |
| Chân 113 | VDDX — External supply |
| Chân 114 | CAN0TX — MSCAN0 transmit |
| Chân 115 | CAN0RX — MSCAN0 receive |
| Chân 116 | CAN1TX — MSCAN1 transmit |
| Chân 117 | CAN1RX — MSCAN1 receive |
| Chân 118 | CAN2TX — MSCAN2 transmit |
| Chân 119 | CAN2RX — MSCAN2 receive |
| Chân 120 | CAN3TX — MSCAN3 transmit |
| Chân 121 | CAN3RX — MSCAN3 receive |
| Chân 122 | TXD0 — SCI0 transmit |
| Chân 123 | RXD0 — SCI0 receive |
| Chân 124 | TXD1 — SCI1 transmit |
| Chân 125 | RXD1 — SCI1 receive |
| Chân 126 | MOSI0 — SPI0 master out / slave in |
| Chân 127 | MISO0 — SPI0 master in / slave out |
| Chân 128 | SCK0 — SPI0 clock |
| Chân 129 | SS0 — SPI0 slave select |
| Chân 130 | MOSI1 — SPI1 master out / slave in |
| Chân 131 | MISO1 — SPI1 master in / slave out |
| Chân 132 | SCK1 — SPI1 clock |
| Chân 133 | SS1 — SPI1 slave select |
| Chân 134 | TCLK — Timer clock input |
| Chân 135 | IOC — Input capture / output compare |
| Chân 136 | VSS — Ground |
| Chân 137 | VDDX — External supply |
| Chân 138 | TFTCLK — TFT display clock |
| Chân 139 | TFTVSYNC — TFT vertical sync |
| Chân 140 | TFTHSYNC — TFT horizontal sync |
| Chân 141 | TFTDE — TFT data enable |
| Chân 142 | TFTD0 — TFT data bit 0 |
| Chân 143 | TFTD1 — TFT data bit 1 |
| Chân 144 | VSS — Ground |
Ứng dụng tiêu biểu
S912XHZ256F1VAG phù hợp cho 7 Áp dụngs: Automotive Instrument Cluster with Color TFT, Body Control Module (BCM), HVAC Human-Machine Interface, Industrial HMI Panel with TFT, Motorcycle and Powersport Dashboard, Agricultural Equipment HMI, Marine Gauge Cluster.
Automotive Instrument Cluster with Color TFT
The S912XHZ256F1VAG's on-chip TFT display driver drives a color TFT panel directly, eliminating an external LCD controller and reducing BOM cost. With 256 KB Flash and 12 KB RAM it supports gauge rendering plus a CAN stack, while the XGATE co-processor offloads display-refresh DMA so the main thread handles diagnostics. Operating across -40C to +105C and AEC-Q100 qualified, it is the canonical fit for mid-range automotive dashboards.
Được đề xuất
Body Control Module (BCM)
Multiple MSCAN channels and abundant PWM timers make the S912XHZ256F1VAG a strong fit for body control modules driving lighting, mirrors, and door-lock actuators. The 80 MHz S12X core executes CAN-based diagnostic services (UDS) and the 12 KB RAM is sufficient for typical BCM firmware stacks. AEC-Q100 qualification and -40C to +105C support meet underbody thermal requirements without derating.
Được đề xuất
HVAC Human-Machine Interface
The S912XHZ256F1VAG's combination of TFT driver, PWM, ADC, and CAN channels fits HVAC control panels that drive a small color display while reading temperature sensors and toggling blower speed. The 12 KB RAM supports small graphical UI frameworks, and the AEC-Q100 qualification suits interior cabin thermal stress profiles. Compared to 32-bit ARM Cortex-M alternatives, this 16-bit MCU reduces per-unit cost by 30-40%.
Được đề xuất
Industrial HMI Panel with TFT
Outside of automotive, the S912XHZ256F1VAG serves industrial HMI panels for factory automation where its AEC-Q100 grade provides extra margin against harsh environments. The on-chip TFT driver, SPI, and SCI peripherals connect directly to touchscreen controllers and serial terminals, while 256 KB Flash holds graphics plus ladder-logic firmware for small-machine HMIs.
Được đề xuất
Motorcycle and Powersport Dashboard
Powersport dashboards demand automotive-grade temperature resilience, vibration tolerance, and compact TFT rendering - all delivered by the S912XHZ256F1VAG. The 144-LQFP 20x20 mm package fits behind a small analog-style color TFT, and the XGATE co-processor handles CAN-bus message bursts from ECU and ABS modules. Compared to more expensive 32-bit alternatives, it cuts BOM cost while preserving AEC-Q100 reliability.
Được đề xuất
Agricultural Equipment HMI
Tractors, combines, and irrigation controllers benefit from the S912XHZ256F1VAG's -40C to +105C range, AEC-Q100 qualification, and on-chip TFT driver. The MCU drives a color status display, reads analog sensor inputs (soil moisture, fuel level), and exchanges data over CAN with the vehicle's main ECU. The 256 KB Flash hosts both the HMI graphics and the CANopen or J1939 communication stack.
Được đề xuất
Marine Gauge Cluster
Marine instrument clusters require wide-temperature operation, vibration tolerance, and on-board TFT rendering for speed, depth, and navigation displays. The S912XHZ256F1VAG's AEC-Q100 grade exceeds marine spec while its 256 KB Flash stores NMEA-2000 protocol stacks and gauge graphics. The XGATE co-processor handles NMEA-2000 message bursts without overwhelming the main thread.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho S912XHZ256F1VAG — 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 | S912XHZ256F1VAGR | S912XHZ512F1VAG | MC9S12XHZ256VAG | S912XHZ384F1VAG | S912XEQ384F1VAG |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors (legacy mask) | 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 (20x20 mm) - same | 144-LQFP (20x20 mm) - same |
| Core | HCS12X with XGATE | HCS12X with XGATE | HCS12X with XGATE | HCS12X with XGATE | HCS12X with XGATE | HCS12X with XGATE |
| Flash Memory | 256 KB | 256 KB | 512 KB | 256 KB | 384 KB | 384 KB |
| RAM | 12 KB | 12 KB | 32 KB | 12 KB | 20 KB | 24 KB |
| CPU Clock | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| On-chip TFT Driver | Yes | Yes | Yes | Yes | Yes | Yes |
| CAN Channels | 4 MSCAN | 4 MSCAN | 5 MSCAN | 4 MSCAN | 4 MSCAN | 5 MSCAN (with LIN) |
| Operating Temperature | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C |
| AEC-Q100 | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified |
Bảo phân biệt quan trọng
- First MCU with on-chip TFT display driver in this price tier (vsMC9S12XHZ256VAG)
- Doubles Flash headroom with same pinout (vsS912XHZ512F1VAG)
- Same family upgrade with extra CAN/LIN (vsS912XEQ384F1VAG)
Ghi chú thiết kế
Estimated: at 80 MHz with full peripheral activity, the S912XHZ256F1VAG draws approximately 65-80 mA from VDDX (5V) and VDDR (2.5V internal regulator). A low-ESR 100 nF ceramic bypass capacitor on each VDDX pin and a 4.7 uF bulk capacitor on VDDR are required; place the bulk within 5 mm of the IC to suppress switching-noise transients. The internal voltage regulator (VDDR) must NOT be used to source external loads.
Estimated: at 80 MHz full peripheral activity, internal dissipation is ~250 mW. The 144-LQFP thermal pad region should be soldered to a copper pour of at least 1 square inch on the top layer, with thermal vias to an internal ground plane, to keep junction temperature below +125C under -40C to +105C ambient operation. Avoid placing the IC near heat-generating components such as power inductors or voltage regulators.
Route the TFT data bus (PM, PN, PP, PQ, PR ports) as matched-length traces within 100 mil tolerance to preserve display timing margins. Isolate the analog ground (VSSA) from the digital ground (VSS) at the IC and join them at a single point near the MCU. Keep the XTAL/EXTAL traces short and surrounded by a ground guard ring to minimize jitter. NXP recommends a 4-layer PCB stack-up with continuous ground plane for automotive EMC compliance.
Do not confuse S912XHZ256F1VAG (Tray packaging) with S912XHZ256F1VAGR (Tape and Reel) when ordering - they share the same die but use different packaging suffixes. Do not operate the MCU with VDDX below 2.5V or above 5.5V; the internal VDDR LDO requires 2.7V minimum input. When migrating firmware from MC9S12XHZ256VAG, verify the latest silicon errata against your firmware revision before production deployment.
Thông tin tuân thủ
AEC-Q100 automotive qualified per NXP S12XHZ family datasheet. RoHS and REACH compliant per NXP product page. Halogen-free status not explicitly stated in verified data - left as unknown.
