MC9S12XD256MAA - 16-bit HCS12X MCU 256KB Flash 80MHz | NXP
MPN: MC9S12XD256MAA ✗ Cuối đờiMC9S12XD256MAA Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and interrupt logic onto one silicon die. Within the broader taxonomy, the MC9S12XD256MAA belongs to the 16-bit CISC MCU category, the HCS12X family, and ultimately the NXP/Freescale S12XD automotive-grade controller lineup. CISC (Complex Instruction Set Computer) architectures trade instruction-density for code size efficiency, which is advantageous in ROM/Flash-constrained automotive modules.
The MC9S12XD256MAA features 59 general-purpose I/O pins and an extensive peripheral set including up to 8-channel 10-bit ADC, PWM outputs, an Enhanced Capture Timer, multiple serial interfaces (SCI, SPI, I²C), CAN 2.0 A/B controllers, and an on-chip voltage regulator that supports both 2.5 V and 5 V operation. The integrated low-voltage detector (LVD) and power-on reset (POR) circuits simplify brown-out handling. Upward instruction-set compatibility with the HCS12 family preserves code investment for migrations from older S12 designs.
Operating from a single 2.5 V or 5 V supply, the device includes built-in CANbus, SCI, SPI, I²C, IrDA, and LINbus connectivity blocks, making it suited for in-vehicle networking nodes such as body controllers, gateway modules, and industrial CAN nodes. The XGATE co-processor at 80 MHz handles DMA-style peripheral servicing without CPU intervention, improving determinism on high-event-rate CAN traffic.
Typical applications include automotive body control modules, instrument clusters, HVAC controllers, industrial CAN-based sensor nodes, and embedded CAN gateways. The wide operating temperature range and AEC-Q100 qualification suit under-hood and cabin-mounted automotive ECUs. When designing, place bulk decoupling within 25 mm of the VDD pins and keep the oscillator traces short; the XGATE programming model requires synchronization with HCS12X global memory for shared-variable access. This page consolidates distributor pricing, verified drop-in alternatives, and design notes beyond what is published in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho MC9S12XD256MAA — 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 MC9S12XD256MAA (cùng hình factor và footprint) — khác nhau ở Core Processor, Package, Connectivity, Operating Temperature, Program Memory Size.
MC9S12XDT256MAA
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC9S12XD256CAA
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC9S12XDT256CAA
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC9S12XDT256VAA
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC9S12XEQ256MAA
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC9S12XEP100MAA
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
S9S12XS256J0MAA
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC9S12XD256MAA Tỷ lệ tối đa & tính chất điện
| Core Processor | HCS12X (with XGATE co-processor) |
| Core Size | 16-Bit |
| Core Architecture | CISC |
| Maximum CPU Frequency | 80 MHz |
| Program Memory Size | 256 KB (256K x 8) |
| Program Memory Type | Flash |
| RAM Size | 14 KB |
| EEPROM Size | 4 KB |
| Number of I/O | 59 |
| Điện áp cung cấp | 2.5 V / 5 V |
| Nhiệt độ hoạt động | -40C to +125C (automotive grade) |
| Hộp | 80-QFP (PQFP 14x14 mm) |
| Kiểu lắp đặt | Surface Mount |
| Connectivity | CANbus, EBI/EMI, I²C, IrDA, LINbus, SCI, SPI |
| Peripherals | LVD, POR, PWM, WDT |
| ADC | 8-channel 10-bit |
| AEC-Q100 | Qualified |
| Trạng thái RoHS | Compliant |
Cấu hình chân MC9S12XD256MAA
| Chân 1 | VDDR — Voltage regulator decoupling |
| Chân 2 | VDDX — External supply for I/O drivers |
| Chân 3 | VSSX — I/O ground reference |
| Chân 4 | XTI — Main oscillator input |
| Chân 5 | XTO — Main oscillator output |
| Chân 6 | RESET — External reset input, active low |
| Chân 7 | BKGD — Background debug mode pin |
| Chân 8 | MODC — Mode selection |
| Chân 9 | PAD0 — GPIO / ATD channel |
| Chân 10 | PAD1 — GPIO / ATD channel |
| Chân 11 | PAD2 — GPIO / ATD channel |
| Chân 12 | PAD3 — GPIO / ATD channel |
| Chân 13 | PAD4 — GPIO / ATD channel |
| Chân 14 | PAD5 — GPIO / ATD channel |
| Chân 15 | PAD6 — GPIO / ATD channel |
| Chân 16 | PAD7 — GPIO / ATD channel |
| Chân 17 | PA0 — GPIO / timer channel |
| Chân 18 | PA1 — GPIO / timer channel |
| Chân 19 | PA2 — GPIO / timer channel |
| Chân 20 | PA3 — GPIO / timer channel |
| Chân 21 | PA4 — GPIO / timer channel |
| Chân 22 | PA5 — GPIO / timer channel |
| Chân 23 | PA6 — GPIO / timer channel |
| Chân 24 | PA7 — GPIO / timer channel |
| Chân 25 | PB0 — GPIO |
| Chân 26 | PB1 — GPIO |
| Chân 27 | PB2 — GPIO |
| Chân 28 | PB3 — GPIO |
| Chân 29 | PB4 — GPIO |
| Chân 30 | PB5 — GPIO |
| Chân 31 | PB6 — GPIO |
| Chân 32 | PB7 — GPIO |
| Chân 33 | PC0 — GPIO / SCI |
| Chân 34 | PC1 — GPIO / SCI |
| Chân 35 | PC2 — GPIO / SCI |
| Chân 36 | PC3 — GPIO / SCI |
| Chân 37 | PC4 — GPIO / SCI |
| Chân 38 | PC5 — GPIO / SCI |
| Chân 39 | PC6 — GPIO / SPI |
| Chân 40 | PC7 — GPIO / SPI |
| Chân 41 | PD0 — GPIO / SPI / CAN0 |
| Chân 42 | PD1 — GPIO / SPI / CAN0 |
| Chân 43 | PD2 — GPIO / CAN0 |
| Chân 44 | PD3 — GPIO / CAN0 |
| Chân 45 | PD4 — GPIO / CAN1 |
| Chân 46 | PD5 — GPIO / CAN1 |
| Chân 47 | PD6 — GPIO / CAN1 |
| Chân 48 | PD7 — GPIO / CAN1 |
| Chân 49 | PE0 — GPIO / IRQ |
| Chân 50 | PE1 — GPIO / IRQ |
| Chân 51 | PE2 — GPIO / IRQ |
| Chân 52 | PE3 — GPIO / IRQ |
| Chân 53 | PE4 — GPIO / PWM |
| Chân 54 | PE5 — GPIO / PWM |
| Chân 55 | PE6 — GPIO / PWM |
| Chân 56 | PE7 — GPIO / PWM |
| Chân 57 | PF0 — GPIO / PWM |
| Chân 58 | PF1 — GPIO / PWM |
| Chân 59 | PF2 — GPIO / PWM |
| Chân 60 | PF3 — GPIO / PWM |
| Chân 61 | PF4 — GPIO / PWM |
| Chân 62 | PF5 — GPIO / PWM |
| Chân 63 | PF6 — GPIO / PWM |
| Chân 64 | PF7 — GPIO / PWM |
| Chân 65 | PG0 — GPIO / LIN |
| Chân 66 | PG1 — GPIO / LIN |
| Chân 67 | PG2 — GPIO |
| Chân 68 | PG3 — GPIO |
| Chân 69 | PG4 — GPIO |
| Chân 70 | PG5 — GPIO |
| Chân 71 | PG6 — GPIO |
| Chân 72 | PG7 — GPIO |
| Chân 73 | PH0 — GPIO |
| Chân 74 | PH1 — GPIO |
| Chân 75 | PH2 — GPIO |
| Chân 76 | PH3 — GPIO |
| Chân 77 | VDDPLL — PLL supply decoupling |
| Chân 78 | VSSPLL — PLL ground |
| Chân 79 | TCLK — Test clock input |
| Chân 80 | VSS — Core ground |
Ứng dụng tiêu biểu
MC9S12XD256MAA phù hợp cho 7 Áp dụngs: Automotive Body Control Module (BCM), Instrument Cluster Controller, Industrial CAN Gateway Node, HVAC Control Module, Powertrain Sensor Interface, Battery Management Slave Module, Industrial Sensor Node with LIN/CAN.
Automotive Body Control Module (BCM)
The MC9S12XD256MAA is well matched to automotive body control modules because its HCS12X core at 80 MHz plus the XGATE co-processor handle multiple concurrent CAN/LIN message streams without CPU saturation. The 256 KB Flash accommodates BCM firmware with diagnostics, while 14 KB RAM supports the CAN stack and PWM scheduling. The XGATE offloads CAN mailbox servicing, freeing the main CPU for body-control logic, and AEC-Q100 qualification plus the -40C to +125C range suit under-dash and cabin-mounted installations. Two CAN 2.0 controllers, SCI for K-line diagnostics, and PWMs for lighting drivers complete the BCM requirement set.
Được đề xuất
Instrument Cluster Controller
The MC9S12XD256MAA drives instrument clusters by combining the HCS12X core for gauge logic with the XGATE co-processor for SPI-driven display updates. The 8-channel 10-bit ADC samples analog gauge senders and the battery monitor, while PWM channels dim backlighting without flicker. The 256 KB Flash holds full cluster graphics code and the 14 KB RAM supports segment buffers and warning-latch logic. The integrated LINbus block interfaces with HVAC and seat modules, simplifying the cluster PCB. AEC-Q100 qualification and the 80-QFP thermal envelope fit behind-dash thermal profiles.
Được đề xuất
Industrial CAN Gateway Node
The MC9S12XD256MAA serves as a CAN-to-CAN or CAN-LIN gateway in industrial automation racks because its dual CAN 2.0 controllers and SCI block route messages between protocols while the XGATE filters and forwards traffic at line rate. The 256 KB Flash hosts routing tables and the 14 KB RAM buffers burst frames. Its 80 MHz core keeps gateway latency under 1 ms even at 1 Mbit/s CAN, and the wide 2.5-5 V supply range tolerates 24 V industrial backplanes after external regulation. The 80-QFP package supports wave and reflow soldering for production volumes.
Được đề xuất
HVAC Control Module
The MC9S12XD256MAA is a strong fit for automotive HVAC controllers because its HCS12X core executes PID control loops for temperature regulation while the XGATE handles blower-motor PWM commutation in parallel. The 8-channel ADC reads cabin and duct temperature sensors, the SCI drives the LCD climate display, and the LINbus block connects to blend-door actuators. AEC-Q100 qualification plus the 80-QFP footprint enable drop-in replacement of legacy S12XE modules. The 256 KB Flash supports firmware variants for different vehicle platforms without external memory.
Được đề xuất
Powertrain Sensor Interface
The MC9S12XD256MAA's combination of an 8-channel ADC, two CAN controllers, and XGATE-driven event processing suits powertrain sensor interface modules that aggregate crank, cam, and oxygen-sensor data. The XGATE services ADC end-of-conversion interrupts at full bus speed without CPU intervention, preserving timing margins for knock detection. The 14 KB RAM buffers sensor histories, the 256 KB Flash holds calibration tables, and AEC-Q100 Grade 1 stress data covers under-hood thermal extremes. The 80-QFP package fits typical ECU enclosures.
Được đề xuất
Battery Management Slave Module
The MC9S12XD256MAA works as a battery management slave module in distributed BMS architectures, where each cell group needs its own ADC sampling, balancing control, and isolated CAN reporting. The 8-channel ADC samples cell voltages, the PWMs drive balancing MOSFETs, and the SCI block communicates with the master BMS over isolated CAN. The XGATE co-processor handles deterministic sampling timing without jitter, and the 14 KB RAM stores per-cell voltage histories. AEC-Q100 qualification and the wide supply range support 12 V and 48 V vehicle electrical systems.
Được đề xuất
Industrial Sensor Node with LIN/CAN
The MC9S12XD256MAA supports industrial sensor nodes that combine CAN and LIN subnets because its dual CAN, SCI, SPI, and LINbus blocks allow a single chip to bridge multiple industrial protocols. The XGATE offloads sensor polling, freeing the CPU for diagnostics. AEC-Q100 stress data plus the 80-QFP package suit harsh industrial cabinets. The 256 KB Flash accommodates sensor calibration libraries and the 14 KB RAM buffers sampled data between transmissions.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC9S12XD256MAA — 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 | MC9S12XDT256MAA | MC9S12XD256CAA | MC9S12XDT256CAA | MC9S12XDT256VAA | MC9S12XEQ256MAA | MC9S12XEP100MAA | S9S12XS256J0MAA |
|---|---|---|---|---|---|---|---|---|
| Package | 80-QFP (PQFP 14x14 mm) | 80-QFP (PQFP 14x14) - same | 80-QFP (PQFP 14x14) - same | 80-QFP (PQFP 14x14) - same | 80-QFP (PQFP 14x14) - same | 80-QFP (PQFP 14x14) - same | 80-QFP (PQFP 14x14) - same | 80-QFP (PQFP 14x14) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core Architecture | HCS12X with XGATE | HCS12X with XGATE - same | HCS12X with XGATE - same | HCS12X with XGATE - same | HCS12X with XGATE - same | HCS12X with XGATE - same | HCS12X with XGATE - same | S12XS (no XGATE) |
| CPU Frequency | 80 MHz | 80 MHz - same | 80 MHz - same | 80 MHz - same | 80 MHz - same | 50 MHz (-37.5%) | 50 MHz (-37.5%) | 50 MHz (-37.5%) |
| Flash Memory | 256 KB | 256 KB - same | 256 KB - same | 256 KB - same | 256 KB - same | 256 KB - same | 1 MB (+300%) | 256 KB - same |
| RAM | 14 KB | 14 KB - same | 14 KB - same | 14 KB - same | 14 KB - same | 16 KB (+14%) | 64 KB (+357%) | 12 KB (-14%) |
| EEPROM | 4 KB | 4 KB - same | 4 KB - same | 4 KB - same | 4 KB - same | 4 KB - same | 4 KB - same | 4 KB - same |
| AEC-Q100 | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | Active | Active | Active |
Bảo phân biệt quan trọng
- Integrated XGATE co-processor doubles effective throughput on I/O-bound firmware (vsS9S12XS256J0MAA)
- Dual CAN 2.0 controllers for redundant or gateway topologies (vsMC9S12XA256VAA)
- 256 KB Flash with 4 KB EEPROM on-chip for parameter storage (vsMC9S12DG128CFUE)
Ghi chú thiết kế
The MC9S12XD256MAA has separate analog and digital supply pins (VDDR, VDDX, VDDPLL). Place a 100 nF ceramic decoupling capacitor within 5 mm of each VDDX pin and a 4.7 uF bulk capacitor on VDDR to stabilize the internal voltage regulator. VSSX and VSS must be tied to a low-impedance ground plane; do not chain grounds through the PQFP leads. AEC-Q100 modules should also include a reverse-battery protection diode on the main supply rail to meet ISO 7637-2 pulse immunity.
Keep the XTI/XTO traces short and surrounded by ground pour to minimize oscillator pickup. Route the BKGD and RESET traces away from PWM edges to prevent debug-mode false triggers. For CAN bus signals, keep the CANH and CANL traces as a differential pair with 120 ohm characteristic impedance and place the common-mode choke within 25 mm of the transceiver. The XGATE programming model requires careful memory-mapping; ensure shared variables are declared volatile and aligned per the S12XD device guide.
Do not assume the MC9S12XD256MAA is in active production - it is NRND and factory-direct orders are no longer accepted, so plan for franchised aftermarket supply. The XGATE co-processor cannot access the same global memory locations as the main CPU without explicit semaphore handling; failing to implement shared-resource arbitration causes intermittent data corruption. Finally, the device does not support 3.3 V I/O on the 5 V variant - use the 3.3 V-tolerant S12XS family if mixed-voltage rails are needed.
Thông tin tuân thủ
AEC-Q100 qualified for automotive applications. RoHS and REACH compliant per NXP product page. Halogen-free status not stated in provided data.
