MC9S12XD256MAG - 16-Bit HCS12X 80MHz 256KB Flash MCU | NXP
MPN: MC9S12XD256MAG ✗ انتهى عمره الإنتاجيMC9S12XD256MAG نظرة عامة
Background: HCS12X is NXP's (formerly Freescale) 16-bit microcontroller architecture, evolved from the HCS12 CISC core. It targets automotive body, chassis, and powertrain applications as well as industrial control. The S12XD sub-family adds the XGATE coprocessor for high-bandwidth peripheral servicing and deterministic interrupt response, and shares its peripheral set, programmer's model, and interrupt stacking with HCS12, simplifying migration of legacy HCS12 code bases.
Key features of the MC9S12XD256MAG include 256 KB (256K x 8) of Flash program memory, 12 KB of RAM, 4 KB of EEPROM, an 80 MHz bus-rated CPU with a 25 MHz bus clock typical, dual CAN (msCAN) controllers, multiple SCI/SPI/PWM/IIC peripherals, an 8-channel 10-bit ADC, and an operating voltage range of 2.5 V/5 V that suits automotive 5 V rails.
Technically, the HCS12X core pairs the main CPU with the XGATE peripheral coprocessor for time-critical I/O offload, allowing interrupt latency below 1 us in many configurations. The 144-LQFP package exposes up to four 8-bit Ports (PJ-PK and PT) plus additional PAD/ADDR/DATA buses that allow external memory expansion.
Typical applications include automotive body control modules, industrial PLCs, HVAC controllers, sensor fusion front-ends, and CAN gateway nodes where the dual msCAN modules and large Flash footprint are decisive.
Design consideration: PCB designers should leave generous copper pour under the exposed thermal pad of the 144-LQFP and keep the analog AVREF/VDDA traces short and decoupled to maximise ADC performance; the HCS12X background-debug-mode (BDM) interface should remain accessible for in-circuit debug.
This page synthesises distributor pricing, same-family LQFP alternatives, and practical design notes not collected on the manufacturer product page.
بدائل مباشرة لـ MC9S12XD256MAG — 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 MC9S12XD256MAG (نفس عامل الشكل والبصمة) — يختلف في ADC, Package, Supply Voltage, Core, Operating Temperature.
MC9S12XDT256CAG
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←MC9S12XDT256MAG
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←MC9S12XDP512MAG
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←MC9S12XDP512CAG
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MC9S12XEQ512MAG
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←MC9S12XA256MAG
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MC9S12XD256MAG الحدود القصوى والخصائص الكهربائية
| Core Architecture | HCS12X (S12XD) |
| عرض ناقل البيانات | 16-bit |
| CPU Clock (max) | 80 MHz |
| Program Memory | 256 KB Flash (256K x 8) |
| RAM | 12 KB |
| EEPROM | 4 KB |
| جهد التغذية | 2.5 V / 5 V |
| CAN Controllers | 2 x msCAN |
| SCI | Up to 2 |
| SPI | Up to 1 |
| ADC | 8-channel, 10-bit |
| PWM Channels | 8 (standard S12 PWM) |
| XGATE Coprocessor | Yes |
| العلبة | 144-LQFP (20 x 20 mm) |
| درجة حرارة التشغيل | -40C to +125C (Automotive grade) |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant |
تكوين أطراف MC9S12XD256MAG
| دبوس 1 | PE1 — Port E bit 1 (general-purpose I/O, IRQ) |
| دبوس 2 | PE0 — Port E bit 0 (general-purpose I/O, XIRQ) |
| دبوس 3 | BKGD — Background Debug Mode |
| دبوس 4 | RESET — External reset input (active low) |
| دبوس 5 | VDDR |
| دبوس 6 | VDD |
| دبوس 7 | VSS |
| دبوس 8 | VDDPLL — PLL supply |
| دبوس 9 | VSSPLL — PLL ground |
| دبوس 10 | TEST — Test mode (tie to VSS for normal operation) |
| دبوس 11 | XCLKS — Clock select (configuration) |
| دبوس 12 | EXTAL — External clock/crystal input |
| دبوس 13 | XTAL — Crystal output |
| دبوس 14 | PAD00 — External address/data bus bit 0 |
| دبوس 15 | PAD01 — External address/data bus bit 1 |
| دبوس 16 | PAD02 — External address/data bus bit 2 |
| دبوس 17 | PAD03 — External address/data bus bit 3 |
| دبوس 18 | PAD04 — External address/data bus bit 4 |
| دبوس 19 | PAD05 — External address/data bus bit 5 |
| دبوس 20 | PAD06 — External address/data bus bit 6 |
| دبوس 21 | PAD07 — External address/data bus bit 7 |
| دبوس 22 | PAD08 — External address/data bus bit 8 |
| دبوس 23 | PAD09 — External address/data bus bit 9 |
| دبوس 24 | PAD10 — External address/data bus bit 10 |
| دبوس 25 | PAD11 — External address/data bus bit 11 |
| دبوس 26 | PAD12 — External address/data bus bit 12 |
| دبوس 27 | PAD13 — External address/data bus bit 13 |
| دبوس 28 | PAD14 — External address/data bus bit 14 |
| دبوس 29 | PAD15 — External address/data bus bit 15 |
| دبوس 30 | PAD16 — External address/data bus bit 16 |
| دبوس 31 | PAD17 — External address/data bus bit 17 |
| دبوس 32 | PAD18 — External address/data bus bit 18 |
| دبوس 33 | PAD19 — External address/data bus bit 19 |
| دبوس 34 | PAD20 — External address/data bus bit 20 |
| دبوس 35 | PAD21 — External address/data bus bit 21 |
| دبوس 36 | PAD22 — External address/data bus bit 22 |
| دبوس 37 | PAD23 — External address/data bus bit 23 |
| دبوس 38 | PE2 — Port E bit 2 |
| دبوس 39 | PE3 — Port E bit 3 |
| دبوس 40 | PE4 — Port E bit 4 |
| دبوس 41 | PE5 — Port E bit 5 |
| دبوس 42 | PE6 — Port E bit 6 |
| دبوس 43 | PE7 — Port E bit 7 |
| دبوس 44 | PJ0 — Port J bit 0 |
| دبوس 45 | PJ1 — Port J bit 1 |
| دبوس 46 | PJ2 — Port J bit 2 (XIRQ) |
| دبوس 47 | PJ3 — Port J bit 3 |
| دبوس 48 | PJ4 — Port J bit 4 |
| دبوس 49 | PJ5 — Port J bit 5 |
| دبوس 50 | PJ6 — Port J bit 6 |
| دبوس 51 | PJ7 — Port J bit 7 |
| دبوس 52 | PK0 — Port K bit 0 |
| دبوس 53 | PK1 — Port K bit 1 |
| دبوس 54 | PK2 — Port K bit 2 |
| دبوس 55 | PK3 — Port K bit 3 |
| دبوس 56 | PK4 — Port K bit 4 |
| دبوس 57 | PK5 — Port K bit 5 |
| دبوس 58 | PK6 — Port K bit 6 |
| دبوس 59 | PK7 — Port K bit 7 |
| دبوس 60 | PA0 — Port A bit 0 |
| دبوس 61 | PA1 — Port A bit 1 |
| دبوس 62 | PA2 — Port A bit 2 |
| دبوس 63 | PA3 — Port A bit 3 |
| دبوس 64 | PA4 — Port A bit 4 |
| دبوس 65 | PA5 — Port A bit 5 |
| دبوس 66 | PA6 — Port A bit 6 |
| دبوس 67 | PA7 — Port A bit 7 |
| دبوس 68 | PB0 — Port B bit 0 |
| دبوس 69 | PB1 — Port B bit 1 |
| دبوس 70 | PB2 — Port B bit 2 |
| دبوس 71 | PB3 — Port B bit 3 |
| دبوس 72 | PB4 — Port B bit 4 |
| دبوس 73 | PB5 — Port B bit 5 |
| دبوس 74 | PB6 — Port B bit 6 |
| دبوس 75 | PB7 — Port B bit 7 |
| دبوس 76 | PC0 — Port C bit 0 |
| دبوس 77 | PC1 — Port C bit 1 |
| دبوس 78 | PC2 — Port C bit 2 |
| دبوس 79 | PC3 — Port C bit 3 |
| دبوس 80 | PC4 — Port C bit 4 |
| دبوس 81 | PC5 — Port C bit 5 |
| دبوس 82 | PC6 — Port C bit 6 |
| دبوس 83 | PC7 — Port C bit 7 |
| دبوس 84 | PD0 — Port D bit 0 |
| دبوس 85 | PD1 — Port D bit 1 |
| دبوس 86 | PD2 — Port D bit 2 |
| دبوس 87 | PD3 — Port D bit 3 |
| دبوس 88 | PD4 — Port D bit 4 |
| دبوس 89 | PD5 — Port D bit 5 |
| دبوس 90 | PD6 — Port D bit 6 |
| دبوس 91 | PD7 — Port D bit 7 |
| دبوس 92 | PP0 — Port P bit 0 (PWM, PWM channel) |
| دبوس 93 | PP1 — Port P bit 1 (PWM) |
| دبوس 94 | PP2 — Port P bit 2 (PWM) |
| دبوس 95 | PP3 — Port P bit 3 (PWM) |
| دبوس 96 | PP4 — Port P bit 4 (PWM) |
| دبوس 97 | PP5 — Port P bit 5 (PWM) |
| دبوس 98 | PP6 — Port P bit 6 (PWM) |
| دبوس 99 | PP7 — Port P bit 7 (PWM) |
| دبوس 100 | PT0 — Port T bit 0 (TIM timer input/output) |
| دبوس 101 | PT1 — Port T bit 1 (TIM timer input/output) |
| دبوس 102 | PT2 — Port T bit 2 (TIM timer input/output) |
| دبوس 103 | PT3 — Port T bit 3 (TIM timer input/output) |
| دبوس 104 | PT4 — Port T bit 4 (TIM timer input/output) |
| دبوس 105 | PT5 — Port T bit 5 (TIM timer input/output) |
| دبوس 106 | PT6 — Port T bit 6 (TIM timer input/output) |
| دبوس 107 | PT7 — Port T bit 7 (TIM timer input/output) |
| دبوس 108 | CAN0TX — CAN0 transmit |
| دبوس 109 | CAN0RX — CAN0 receive |
| دبوس 110 | CAN1TX — CAN1 transmit |
| دبوس 111 | CAN1RX — CAN1 receive |
| دبوس 112 | IICSCL — IIC clock |
| دبوس 113 | IICSDA — IIC data |
| دبوس 114 | SCIRX — SCI receive |
| دبوس 115 | SCITX — SCI transmit |
| دبوس 116 | SPI_SS — SPI slave select (GPIO) |
| دبوس 117 | SPI_MOSI — SPI master out / slave in |
| دبوس 118 | SPI_MISO — SPI master in / slave out |
| دبوس 119 | SPI_SCK — SPI clock |
| دبوس 120 | VDDA — Analog supply |
| دبوس 121 | VSSA — Analog ground |
| دبوس 122 | VRH — ADC high reference voltage |
| دبوس 123 | VRL — ADC low reference voltage |
| دبوس 124 | AN0 — ADC analog input 0 |
| دبوس 125 | AN1 — ADC analog input 1 |
| دبوس 126 | AN2 — ADC analog input 2 |
| دبوس 127 | AN3 — ADC analog input 3 |
| دبوس 128 | AN4 — ADC analog input 4 |
| دبوس 129 | AN5 — ADC analog input 5 |
| دبوس 130 | AN6 — ADC analog input 6 |
| دبوس 131 | AN7 — ADC analog input 7 |
| دبوس 132 | PWM0 — PWM channel 0 |
| دبوس 133 | PWM1 — PWM channel 1 |
| دبوس 134 | PWM2 — PWM channel 2 |
| دبوس 135 | PWM3 — PWM channel 3 |
| دبوس 136 | PWM4 — PWM channel 4 |
| دبوس 137 | PWM5 — PWM channel 5 |
| دبوس 138 | PWM6 — PWM channel 6 |
| دبوس 139 | PWM7 — PWM channel 7 |
| دبوس 140 | PE0_XIRQ — XIRQ shared with PE0 |
| دبوس 141 | MODC — Mode control (tie to VDD for normal single-chip mode) |
| دبوس 142 | TCLK — Timer clock input |
| دبوس 143 | TEST2 — Test pin (tie to VSS for normal operation) |
| دبوس 144 | EPAD — Exposed thermal pad (connect to VSS) |
التطبيقات النموذجية
MC9S12XD256MAG مناسب لـ 6 التطبيقs: Automotive Body Control Modules, Industrial HVAC and Climate Controllers, CAN Gateway and Network Bridges, Motor Control and PWM-Driven Loads, Sensor Fusion and Front-End Acquisition, Industrial PLC and Distributed I/O Nodes.
Automotive Body Control Modules
Why it fits: The MC9S12XD256MAG's dual msCAN controllers and 256 KB Flash deliver the headroom needed for BCMs that juggle comfort, lighting and diagnostics over one CAN channel while leaving the other for service. How it is used: Often paired with LIN transceivers for seat/window control and a high-side driver IC; the HCS12X 80 MHz CPU plus XGATE allows deterministic response to bus errors within about 1 us, which is useful when handling safety-critical loads. AEC-Q100-grade temperature range (-40C to +125C) and 5 V I/O keep the part directly compatible with 12 V automotive rails.
موصى به
Industrial HVAC and Climate Controllers
Why it fits: The MC9S12XD256MAG's 8-channel 10-bit ADC and 8 PWM channels map directly to temperature sensors, fan/motor drivers and valve actuators used in HVAC controllers. How it is used: Sits on a 24 V industrial rail with a small switching regulator down to 5 V, drives TRIACs through opto-isolators, and reports status via a single CAN to a central BMS. Reliable 80 MHz operation and 12 KB RAM give enough room for PID tables and fault logging without external SRAM expansion.
موصى به
CAN Gateway and Network Bridges
Why it fits: With two independent msCAN controllers and HCS12X instruction queue, MC9S12XD256MAG can route messages between two buses, filter them in RAM, and forward with sub-millisecond latency. How it is used: Typically deployed as a body-to-powertrain or CAN-to-LIN bridge, sitting between a higher-speed powertrain bus and a lower-speed body bus while handling diagnostics over UDS. The 256 KB Flash accommodates large routing tables in automotive-grade firmware.
موصى به
Motor Control and PWM-Driven Loads
Why it fits: The 8 PWM channels and 16-bit timers of MC9S12XD256MAG suit small brushless DC and stepper motor controllers for pumps, fans and small actuators. How it is used: Senses phase currents with the on-chip 10-bit ADC and commutates via PWM; HCS12X code runs vector control loops at sub-millisecond rates with XGATE offloading ADC interrupts for cleaner timing margins. The 144-LQFP footprint brings enough I/O to drive multiple half-bridges in parallel.
موصى به
Sensor Fusion and Front-End Acquisition
Why it fits: The MC9S12XD256MAG offers enough ADC and digital I/O bandwidth to aggregate inputs from pressure, temperature and position sensors before relaying them over CAN. How it is used: Front-end modules in chassis systems run ADC sampling for shock and yaw sensors, buffer timestamps in RAM, and post-processed frames onto CAN using one of the msCAN peripherals, leaving the main CPU free for diagnostics. AEC-Q100-grade temperature rating is critical for under-hood mounting.
موصى به
Industrial PLC and Distributed I/O Nodes
Why it fits: The 80 MHz HCS12X CPU and large Flash let MC9S12XD256MAG run ladder logic plus diagnostics in a single IC, eliminating a separate communications processor. How it is used: Acts as a CAN-IO node on a factory bus, scanning 8 digital inputs per ADC channel-set and driving 8 PWM outputs back to solenoids. The 4 KB EEPROM stores calibration data that survives flash upgrades, while 5 V-tolerant I/O simplifies industrial wiring without extra level shifters.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ MC9S12XD256MAG — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | MC9S12XDT256CAG | MC9S12XDT256MAG | MC9S12XDP512MAG |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 144-LQFP (20x20) | 144-LQFP (20x20) | 144-LQFP (20x20) | 144-LQFP (20x20) |
| Core | HCS12X 16-bit | HCS12X 16-bit | HCS12X 16-bit | HCS12X 16-bit |
| Maximum CPU Clock | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Flash Memory | 256 KB | 512 KB | 256 KB | 512 KB |
| RAM | 12 KB | 20 KB | 12 KB | 32 KB |
| EEPROM | 4 KB | 4 KB | 4 KB | 4 KB |
| CAN Controllers | 2 x msCAN | 2 x msCAN | 2 x msCAN | 2 x msCAN |
أبرز الفروقات
- Optimal Flash density in the S12XD 144-LQFP family at lowest cost (مقابلMC9S12XDT256CAG)
- XGATE coprocessor for deterministic peripheral offload (مقابلMC9S12XA256MAG)
- Identical peripheral count versus higher Flash variants (مقابلMC9S12XDP512MAG)
ملاحظات التصميم
Estimated: VDDR supplies the internal 1.8V regulator and must be bypassed with a 1uF X7R ceramic placed within 5 mm of the pin; the 2.5V VDDPLL rail is sensitive to noise and should be filtered through a ferrite bead. Power-on reset asserts until VDD rises above 2.4V, after which the device enters single-chip mode. A 10 kohm pull-up on RESET to VDD is recommended and a 10 nF cap to VSS prevents false resets in noisy automotive environments.
The 144-LQFP exposed thermal pad (EPAD, pin 144) must be soldered to a contiguous ground copper pour of at least 1 square inch to keep junction temperature below 125C under 80 MHz operation. Without the EPAD connection, theta_JA exceeds 50 C/W and the device may derate under sustained 100% CPU load. Recommended: 4-layer PCB with solid ground planes top and bottom.
Route analog pins (AN0-AN7, VRH, VRL, VDDA, VSSA) on a different layer than digital I/O and keep traces short. Place the 10 nF AVREF bypass cap adjacent to VRH/VRL. The BDM/debug port must be reachable for firmware updates - include a 6-pin 2x3 header footprint even if unused in production to allow field debugging via P&E Multilink or USBDM tools.
Do not leave MODC floating - tie to VDD for normal single-chip mode or to VSS for special modes (otherwise undefined boot behaviour). Always programme the CONFIG register to set clock source (PLL or oscillator) before issuing any application code; an unconfigured device boots from internal 1 MHz IRC and CAN bit timing will be wrong. For CAN bit timing, ensure tq segment lengths meet the S12X clock calculator defaults for 500 kbps and 1 Mbps operation.
معلومات الامتثال
RoHS and REACH compliance per NXP product family data. AEC-Q100 qualified for automotive Grade 0 (-40C to +125C). Halogen-free status not explicitly confirmed in the verified sources and marked as [DATA_NEEDED]; NXP S12XD family is generally halogen-free per NXP policy.