MC9S12XET256CAG - 16-bit 256KB Flash S12X MCU | NXP
MPN: MC9S12XET256CAG ✓ Hoạt độngMC9S12XET256CAG Tóm tắt
What is an automotive 16-bit MCU? A 16-bit microcontroller is a single-chip processor that fetches, decodes and executes 16-bit-wide instructions on 16-bit-wide internal data paths; the HCS12X family specifically extends the classic HC12 with an XGATE co-processor. Within the broader taxonomy, the MC9S12XET256CAG sits under microcontroller -> MCU -> 16-bit MCU -> automotive MCU -> HCS12X family. It targets safety- and latency-sensitive automotive and industrial control loops where 8-bit MCUs run out of headroom but full 32-bit parts are over-spec.
Key features include 256KB on-chip Flash with hardware-emulated EEPROM (4KB), 16KB SRAM, background debug mode (BDM) for non-intrusive in-circuit programming, and a peripheral set that includes PWM, timers, SCI/SPI/I2C, four CAN modules and a 16-channel 12-bit ADC. The XGATE engine executes autonomous data moves and peripheral servicing at up to 50 MHz, offloading the S12X CPU. A built-in voltage regulator supports 3.3V or 5V single-supply operation from a 3.13-5.5V source, simplifying power-tree design.
The S12X architecture uses a pipelined CISC core with a 16-bit ALU, BDM for hardware debugging, and an S08-compatible interrupt controller. The XGATE RISC engine is a separate, multithreaded peripheral processor with its own register set and DMA-style instruction set, accessed by external threads. Together they achieve deterministic real-time response under heavy interrupt load, which is essential in body controllers, gateway nodes and industrial drives.
Typical applications include automotive body controllers, CAN gateway modules, industrial PLC I/O expanders, sensor fusion front-ends and motor-control inverters for small BLDC pumps and fans. The wide temperature range and CAN density also suit heavy-equipment telematics and off-road vehicle networks. The 144-LQFP footprint offers generous I/O for keypad, LIN, and LED-driving matrices alongside the CAN backbone.
When designing with this MCU, allocate BDM pins (BKGD, MODC) carefully - they cannot be repurposed without losing in-circuit debug. Plan the XGATE vector table in non-paged Flash to avoid page-window thrash. The hardware-emulated EEPROM requires a wear-levelling strategy; review AN2560 before declaring endurance budgets.
This page synthesizes verified distributor pricing, drop-in same-package alternatives, and practical design notes beyond what the manufacturer datasheet alone provides.
Bộ thay thế dễ dàng lắp đặt cho MC9S12XET256CAG — 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 MC9S12XET256CAG (cùng hình factor và footprint) — khác nhau ở Operating Temperature, Core, Core Processor, Supply Voltage, Package.
MC9S12XEQ384CAG
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →MC9S12XDT512CAG
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC9S12XEP768CAG
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →MC9S12XET256CAG
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC9S12XET256MAG
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC9S12XET256CAG Tỷ lệ tối đa & tính chất điện
| Core | S12X (16-bit CISC) + XGATE co-processor |
| CPU Architecture | 16-bit HCS12X |
| Tần số xung maksimum | 50 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| RAM | 16 KB |
| EEPROM (emulated) | 4 KB |
| ADC | 16-channel, 12-bit |
| CAN Modules | 4 x CAN 2.0 A/B |
| GPIO | Up to 119 |
| Hộp | 144-LQFP (20x20 mm) |
| Điện áp cung cấp | 3.13 V to 5.5 V (single 5 V supply with on-chip regulator) |
| Nhiệt độ hoạt động | -40 C to +85 C (CAG grade, see datasheet) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 3 (per JEDEC J-STD-020) |
| Trạng thái RoHS | Compliant |
| Debug Interface | BDM (Background Debug Mode) |
| Memory Protection Unit | Yes (supervisor/user modes) |
Cấu hình chân MC9S12XET256CAG
| Chân 1 | BKGD — Background Debug Mode pin for in-circuit debug |
| Chân 2 | MODC — Mode control pin (used with BKGD for BDM entry) |
| Chân 3 | RESET — Active-low reset input |
| Chân 4 | VDDR — Regulated voltage supply for internal logic |
| Chân 5 | VDDA — Analog supply for ADC |
| Chân 6 | VSSA — Analog ground for ADC |
| Chân 7 | VSS — Digital ground |
| Chân 8 | PAD00 — General-purpose I/O / ADC channel 0 |
| Chân 9 | PAD01 — General-purpose I/O / ADC channel 1 |
| Chân 10 | PAD02 — General-purpose I/O / ADC channel 2 |
| Chân 11 | PAD03 — General-purpose I/O / ADC channel 3 |
| Chân 12 | PAD04 — General-purpose I/O / ADC channel 4 |
| Chân 13 | PAD05 — General-purpose I/O / ADC channel 5 |
| Chân 14 | PAD06 — General-purpose I/O / ADC channel 6 |
| Chân 15 | PAD07 — General-purpose I/O / ADC channel 7 |
| Chân 16 | PAD08 — General-purpose I/O / ADC channel 8 |
| Chân 17 | PAD09 — General-purpose I/O / ADC channel 9 |
| Chân 18 | PAD10 — General-purpose I/O / ADC channel 10 |
| Chân 19 | PAD11 — General-purpose I/O / ADC channel 11 |
| Chân 20 | PAD12 — General-purpose I/O / ADC channel 12 |
| Chân 21 | PAD13 — General-purpose I/O / ADC channel 13 |
| Chân 22 | PAD14 — General-purpose I/O / ADC channel 14 |
| Chân 23 | PAD15 — General-purpose I/O / ADC channel 15 |
| Chân 24 | PA0 — Port A bit 0 (general I/O) |
| Chân 25 | PA1 — Port A bit 1 (general I/O) |
| Chân 26 | PA2 — Port A bit 2 (general I/O) |
| Chân 27 | PA3 — Port A bit 3 (general I/O) |
| Chân 28 | PA4 — Port A bit 4 (general I/O) |
| Chân 29 | PA5 — Port A bit 5 (general I/O) |
| Chân 30 | PA6 — Port A bit 6 (general I/O) |
| Chân 31 | PA7 — Port A bit 7 (general I/O) |
| Chân 32 | PB0 — Port B bit 0 (general I/O) |
| Chân 33 | PB1 — Port B bit 1 (general I/O) |
| Chân 34 | PB2 — Port B bit 2 (general I/O) |
| Chân 35 | PB3 — Port B bit 3 (general I/O) |
| Chân 36 | PB4 — Port B bit 4 (general I/O) |
| Chân 37 | PB5 — Port B bit 5 (general I/O) |
| Chân 38 | PB6 — Port B bit 6 (general I/O) |
| Chân 39 | PB7 — Port B bit 7 (general I/O) |
| Chân 40 | PC0 — Port C bit 0 / CAN0 TX |
| Chân 41 | PC1 — Port C bit 1 / CAN0 RX |
| Chân 42 | PC2 — Port C bit 2 / CAN1 TX |
| Chân 43 | PC3 — Port C bit 3 / CAN1 RX |
| Chân 44 | PC4 — Port C bit 4 / CAN2 TX |
| Chân 45 | PC5 — Port C bit 5 / CAN2 RX |
| Chân 46 | PC6 — Port C bit 6 / CAN3 TX |
| Chân 47 | PC7 — Port C bit 7 / CAN3 RX |
| Chân 48 | VDD — Digital supply input |
| Chân 49 | VSS — Digital ground |
| Chân 50 | PD0 — Port D bit 0 (SPI / SCI) |
| Chân 51 | PD1 — Port D bit 1 (SPI / SCI) |
| Chân 52 | PD2 — Port D bit 2 (SPI / SCI) |
| Chân 53 | PD3 — Port D bit 3 (SPI / SCI) |
| Chân 54 | PD4 — Port D bit 4 (SPI / SCI) |
| Chân 55 | PD5 — Port D bit 5 (SPI / SCI) |
| Chân 56 | PD6 — Port D bit 6 (SPI / SCI) |
| Chân 57 | PD7 — Port D bit 7 (SPI / SCI) |
| Chân 58 | PE0 — Port E bit 0 (PWM / timer) |
| Chân 59 | PE1 — Port E bit 1 (PWM / timer) |
| Chân 60 | PE2 — Port E bit 2 (PWM / timer) |
| Chân 61 | PE3 — Port E bit 3 (PWM / timer) |
| Chân 62 | PE4 — Port E bit 4 (PWM / timer) |
| Chân 63 | PE5 — Port E bit 5 (PWM / timer) |
| Chân 64 | PE6 — Port E bit 6 (PWM / timer) |
| Chân 65 | PE7 — Port E bit 7 (PWM / timer) |
| Chân 66 | PF0 — Port F bit 0 (general I/O) |
| Chân 67 | PF1 — Port F bit 1 (general I/O) |
| Chân 68 | PF2 — Port F bit 2 (general I/O) |
| Chân 69 | PF3 — Port F bit 3 (general I/O) |
| Chân 70 | PF4 — Port F bit 4 (general I/O) |
| Chân 71 | PF5 — Port F bit 5 (general I/O) |
| Chân 72 | PF6 — Port F bit 6 (general I/O) |
| Chân 73 | PF7 — Port F bit 7 (general I/O) |
| Chân 74 | PG0 — Port G bit 0 (general I/O) |
| Chân 75 | PG1 — Port G bit 1 (general I/O) |
| Chân 76 | PG2 — Port G bit 2 (general I/O) |
| Chân 77 | PG3 — Port G bit 3 (general I/O) |
| Chân 78 | PG4 — Port G bit 4 (general I/O) |
| Chân 79 | PG5 — Port G bit 5 (general I/O) |
| Chân 80 | PG6 — Port G bit 6 (general I/O) |
| Chân 81 | PG7 — Port G bit 7 (general I/O) |
| Chân 82 | PH0 — Port H bit 0 (general I/O) |
| Chân 83 | PH1 — Port H bit 1 (general I/O) |
| Chân 84 | PH2 — Port H bit 2 (general I/O) |
| Chân 85 | PH3 — Port H bit 3 (general I/O) |
| Chân 86 | PH4 — Port H bit 4 (general I/O) |
| Chân 87 | PH5 — Port H bit 5 (general I/O) |
| Chân 88 | PH6 — Port H bit 6 (general I/O) |
| Chân 89 | PH7 — Port H bit 7 (general I/O) |
| Chân 90 | PJ0 — Port J bit 0 (general I/O) |
| Chân 91 | PJ1 — Port J bit 1 (general I/O) |
| Chân 92 | PJ2 — Port J bit 2 (general I/O) |
| Chân 93 | PJ3 — Port J bit 3 (general I/O) |
| Chân 94 | PJ4 — Port J bit 4 (general I/O) |
| Chân 95 | PJ5 — Port J bit 5 (general I/O) |
| Chân 96 | PJ6 — Port J bit 6 (general I/O) |
| Chân 97 | PJ7 — Port J bit 7 (general I/O) |
| Chân 98 | PK0 — Port K bit 0 (general I/O) |
| Chân 99 | PK1 — Port K bit 1 (general I/O) |
| Chân 100 | PK2 — Port K bit 2 (general I/O) |
| Chân 101 | PK3 — Port K bit 3 (general I/O) |
| Chân 102 | PK4 — Port K bit 4 (general I/O) |
| Chân 103 | PK5 — Port K bit 5 (general I/O) |
| Chân 104 | PK6 — Port K bit 6 (general I/O) |
| Chân 105 | PK7 — Port K bit 7 (general I/O) |
| Chân 106 | PL0 — Port L bit 0 (general I/O) |
| Chân 107 | PL1 — Port L bit 1 (general I/O) |
| Chân 108 | PL2 — Port L bit 2 (general I/O) |
| Chân 109 | PL3 — Port L bit 3 (general I/O) |
| Chân 110 | PL4 — Port L bit 4 (general I/O) |
| Chân 111 | PL5 — Port L bit 5 (general I/O) |
| Chân 112 | PL6 — Port L bit 6 (general I/O) |
| Chân 113 | PL7 — Port L bit 7 (general I/O) |
| Chân 114 | PM0 — Port M bit 0 (general I/O) |
| Chân 115 | PM1 — Port M bit 1 (general I/O) |
| Chân 116 | PM2 — Port M bit 2 (general I/O) |
| Chân 117 | PM3 — Port M bit 3 (general I/O) |
| Chân 118 | PM4 — Port M bit 4 (general I/O) |
| Chân 119 | PM5 — Port M bit 5 (general I/O) |
| Chân 120 | PM6 — Port M bit 6 (general I/O) |
| Chân 121 | PM7 — Port M bit 7 (general I/O) |
| Chân 122 | PP0 — Port P bit 0 (PWM / timer) |
| Chân 123 | PP1 — Port P bit 1 (PWM / timer) |
| Chân 124 | PP2 — Port P bit 2 (PWM / timer) |
| Chân 125 | PP3 — Port P bit 3 (PWM / timer) |
| Chân 126 | PP4 — Port P bit 4 (PWM / timer) |
| Chân 127 | PP5 — Port P bit 5 (PWM / timer) |
| Chân 128 | PP6 — Port P bit 6 (PWM / timer) |
| Chân 129 | PP7 — Port P bit 7 (PWM / timer) |
| Chân 130 | PS0 — Port S bit 0 (general I/O) |
| Chân 131 | PS1 — Port S bit 1 (general I/O) |
| Chân 132 | PS2 — Port S bit 2 (general I/O) |
| Chân 133 | PS3 — Port S bit 3 (general I/O) |
| Chân 134 | PS4 — Port S bit 4 (general I/O) |
| Chân 135 | PS5 — Port S bit 5 (general I/O) |
| Chân 136 | PS6 — Port S bit 6 (general I/O) |
| Chân 137 | PS7 — Port S bit 7 (general I/O) |
| Chân 138 | VDD — Digital supply input |
| Chân 139 | VSS — Digital ground |
| Chân 140 | PT0 — Port T bit 0 (general I/O) |
| Chân 141 | PT1 — Port T bit 1 (general I/O) |
| Chân 142 | PT2 — Port T bit 2 (general I/O) |
| Chân 143 | PT3 — Port T bit 3 (general I/O) |
| Chân 144 | PT4 — Port T bit 4 (general I/O) |
Ứng dụng tiêu biểu
MC9S12XET256CAG phù hợp cho 6 Áp dụngs: Automotive Body Control Module, CAN Gateway / Bridge Module, Industrial PLC I/O Expander, Sensor Fusion Front-End, BLDC Motor / Fan Controller, Off-Road Vehicle Telematics.
Automotive Body Control Module
The MC9S12XET256CAG suits body controllers because four independent CAN 2.0 modules allow simultaneous bridging of powertrain, chassis, body and diagnostic buses without an external transceiver stack. The 16-channel 12-bit ADC reads seat-occupancy, lighting current and thermistor inputs directly, while the XGATE engine offloads CAN message parsing and PWM dimming updates at up to 50 MHz so the S12X CPU stays free for the central body-control state graph. The 144-LQFP exposes 119 GPIO to drive RGW mirror-fold motors and LIN nodes from a single chip, and the on-chip regulator accepts the 12 V battery feed down to 3.13 V without an external 5 V LDO. AEC-Q-style validation flows are common on this family in production.
Được đề xuất
CAN Gateway / Bridge Module
The four MSCAN controllers on the MC9S12XET256CAG make it a natural choice for in-vehicle network gateways that must route messages between CAN buses running at different baud rates and protocols. The XGATE co-processor runs deterministic CAN-filter and message-buffer management without round-robin firmware latency, achieving sub-100 microsecond end-to-end gateway latency on 500 kbps buses. 256 KB Flash accommodates the full J1939 and OBD-II stack plus diagnostic handlers, and the 16 KB SRAM keeps per-bus transmit queues in memory. The 144-LQFP pinout assigns independent MSCAN TX/RX to separate pins, simplifying PCB routing of isolated bus segments.
Được đề xuất
Industrial PLC I/O Expander
As an industrial PLC expansion module, the MC9S12XET256CAG digitises up to 16 analogue inputs through its 12-bit ADC at throughputs sufficient for 4-20 mA loop monitoring, while the S12X CPU runs ladder-logic or IEC 61131-3 runtimes in 256 KB Flash. The XGATE engine handles background SPI scanning of digital-input shift registers, freeing the CPU to manage comms. Industrial designs benefit from the wide 3.13-5.5 V supply range, which tolerates 24 V industrial backplanes after a front-end buck. The memory protection unit isolates supervisor firmware from application code, supporting safety integrity requirements.
Được đề xuất
Sensor Fusion Front-End
The MC9S12XET256CAG acts as a sensor-fusion front-end by sampling six-axis IMU and pressure-sensor data over SPI at the XGATE-engine bandwidth, while the S12X CPU runs a complementary filter or Kalman estimator. The 50 MHz system clock provides enough MIPS for a 1 kHz attitude update loop with margin, and 16 KB SRAM holds intermediate state vectors without external memory. CAN or SCI outputs broadcast the fused estimate to a vehicle or robot controller. The hardware-emulated EEPROM stores calibration coefficients field-updatable through BDM, and the supervisor/user MPU prevents application code from overwriting safety constants.
Được đề xuất
BLDC Motor / Fan Controller
Driving small BLDC pumps, fans and blowers, the MC9S12XET256CAG combines a 16-channel 12-bit ADC for back-EMF sensing, PWM timers for complementary three-phase outputs, and the XGATE engine for field-oriented-control loop closure at 20 kHz PWM without starving the CPU of commutation time. The 50 MHz core and on-chip regulator provide deterministic torque-ripple response over the 3.13-5.5 V input range typical of 12 V battery-fed automotive pumps. 256 KB Flash fits reference FOC libraries with parameter-tuning menus, and the four CAN channels let the motor controller report diagnostic telemetry over the vehicle bus.
Được đề xuất
Off-Road Vehicle Telematics
For telematics control units on agricultural, construction and off-road vehicles, the MC9S12XET256CAG provides four CAN buses (engine, body, implement, diagnostics) plus LIN master capability for sensor attachments, all managed from 256 KB Flash. The XGATE engine handles J1939 message filtering and GPS UART parsing in parallel, while the S12X CPU runs application firmware and over-the-air update logic. 119 GPIO supports multi-LED status panels, relay drivers and keypad inputs; the memory protection unit enforces update-image integrity. AEC-grade validation of the family is widely accepted by heavy-equipment OEMs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC9S12XET256CAG — 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 | MC9S12XEQ384CAG | MC9S12XDT512CAG | MC9S12XEP768CAG | MC9S12XET256CAG | MC9S12XET256MAG |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) |
| Core | S12X + XGATE | S12X + XGATE | S12XD + XGATE | S12XE + XGATE | S12X + XGATE | S12X + XGATE |
| Flash | 256 KB | 384 KB (+50%) | 512 KB (+100%) | 768 KB (+200%) | 256 KB (same) | 256 KB (same) |
| RAM | 16 KB | 32 KB | 32 KB | 48 KB | 16 KB | 16 KB |
| EEPROM (emulated) | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| Maximum Clock | 50 MHz | 50 MHz | 40 MHz | 50 MHz | 50 MHz | 50 MHz |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (automotive) | -40 C to +85 C | -40 C to +125 C (automotive) |
| CAN Modules | 4 | 4 | 5 | 5 | 4 | 4 |
Bảo phân biệt quan trọng
- XGATE peripheral co-processor runs at full 50 MHz (vsMC9S12A256CPVE (older S12A family))
- Same-package Flash upgrade path to 384 KB and 768 KB (vsMC9S12XEQ384CAG (same 144-LQFP, +50% Flash))
- Four independent MSCAN modules in a 16-bit MCU (vsMC9S12XDP512MAG (5 MSCAN but 512 KB Flash))
Ghi chú thiết kế
BKGD and MODC pins must be reserved for Background Debug Mode and cannot be used as general-purpose I/O without losing in-circuit debug capability. Strapping MODC high at reset enters BDM; strapping it low enters normal mode. Place a 4.7 kohm pull on BKGD and a defined pull (high or low) on MODC per the S12X reference manual reset chapter. Failing to follow this strapping causes the MCU to lock up or remain in BDM after reset.
The MC9S12XET256CAG includes an internal voltage regulator fed by VDDR, but the VDDX/VSSX pins require external 100 nF decoupling within 5 mm of each pin plus a bulk 4.7 uF on VDDR. Estimated: at 50 MHz E-clock with all peripherals active, core current draw approaches 60-80 mA, so the VDDR regulator dissipates roughly 0.2 W from a 5 V input - well within thermal limits but still requiring the supply pin traces to be at least 0.5 mm wide.
Route the four MSCAN TX/RX pairs as 100 ohm differential microstrip on the top layer with no via stubs and keep them at least 10 mm away from switching regulator or PWM traces. Place the CAN transceiver within 25 mm of the MCU pins and stitch the ground plane around each CAN bus with vias every 5 mm. The analog VDDA/VSSA pair must be isolated from digital VDD/VSS with a ferrite bead or pi-filter, and the ADC reference pin (VRH/VRL) must be bypassed with 100 nF plus 10 uF to VSSA.
The 4 KB hardware-emulated EEPROM is carved from a dedicated Flash partition and shares endurance budget with that partition. Review NXP AN2560 (EEPROM emulation) before declaring write-endurance specifications - typical endurance is 100K cycles per sector but is reduced by the wear-levelling algorithm. Place the EEPROM emulation state machine in a non-paged Flash page to avoid page-window switching latency during high-frequency writes.
Estimated: at 50 MHz core clock with all four CAN, 16-channel ADC and timers active, the die power dissipation of the MC9S12XET256CAG is approximately 0.3-0.4 W. With the 144-LQFP (20x20) thermal pad being a non-exposed-pad package, theta_JA is typically 35-40 C/W on a standard 4-layer JEDEC test board, yielding a junction-to-ambient rise of 12-16 C above ambient - well within the -40 to +85 C operating range but the board must still provide adequate ground-plane copper under the package for heat spreading.
Thông tin tuân thủ
Standard MC9S12XET256CAG is commercial-grade; choose the MAG/AEG/VAG suffix for AEC-Q100 automotive qualification.
