MC9S12XET256CAG - 16-bit 256KB Flash S12X MCU | NXP
MPN: MC9S12XET256CAG ✓ AktifMC9S12XET256CAG Ringkasan
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.
Alternatif penggantian untuk MC9S12XET256CAG — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian MC9S12XET256CAG (sama faktor bentuk dan footprint) — berbeda di dalam Operating Temperature, Core, Core Processor, Supply Voltage, Package.
MC9S12XEQ384CAG
✅ Drop-In ⚠️ Spesifikasi Tidak DisahkanKontak untuk harga
Lihat Datasheet →MC9S12XDT512CAG
✅ Drop-InKontak untuk harga
Lihat Datasheet →MC9S12XEP768CAG
✅ Drop-In ⚠️ Spesifikasi Tidak DisahkanKontak untuk harga
Lihat Datasheet →MC9S12XET256CAG
✅ Drop-InKontak untuk harga
Lihat Datasheet →MC9S12XET256MAG
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
MC9S12XET256CAG Rating Maksimal & Karakteristik Listrik
| Core | S12X (16-bit CISC) + XGATE co-processor |
| CPU Architecture | 16-bit HCS12X |
| Frekuensi Bawah Maximum | 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 |
| Paket | 144-LQFP (20x20 mm) |
| Tegangan Pemuat | 3.13 V to 5.5 V (single 5 V supply with on-chip regulator) |
| Suhu Kerja | -40 C to +85 C (CAG grade, see datasheet) |
| Tipe Mounting | Surface Mount |
| Level MSL | 3 (per JEDEC J-STD-020) |
| Status RoHS | Compliant |
| Debug Interface | BDM (Background Debug Mode) |
| Memory Protection Unit | Yes (supervisor/user modes) |
Konfigurasi Pin MC9S12XET256CAG
| Pin produk 1 | BKGD — Background Debug Mode pin for in-circuit debug |
| Pin produk 2 | MODC — Mode control pin (used with BKGD for BDM entry) |
| Pin produk 3 | RESET — Active-low reset input |
| Pin produk 4 | VDDR — Regulated voltage supply for internal logic |
| Pin produk 5 | VDDA — Analog supply for ADC |
| Pin produk 6 | VSSA — Analog ground for ADC |
| Pin produk 7 | VSS — Digital ground |
| Pin produk 8 | PAD00 — General-purpose I/O / ADC channel 0 |
| Pin produk 9 | PAD01 — General-purpose I/O / ADC channel 1 |
| Pin produk 10 | PAD02 — General-purpose I/O / ADC channel 2 |
| Pin produk 11 | PAD03 — General-purpose I/O / ADC channel 3 |
| Pin produk 12 | PAD04 — General-purpose I/O / ADC channel 4 |
| Pin produk 13 | PAD05 — General-purpose I/O / ADC channel 5 |
| Pin produk 14 | PAD06 — General-purpose I/O / ADC channel 6 |
| Pin produk 15 | PAD07 — General-purpose I/O / ADC channel 7 |
| Pin produk 16 | PAD08 — General-purpose I/O / ADC channel 8 |
| Pin produk 17 | PAD09 — General-purpose I/O / ADC channel 9 |
| Pin produk 18 | PAD10 — General-purpose I/O / ADC channel 10 |
| Pin produk 19 | PAD11 — General-purpose I/O / ADC channel 11 |
| Pin produk 20 | PAD12 — General-purpose I/O / ADC channel 12 |
| Pin produk 21 | PAD13 — General-purpose I/O / ADC channel 13 |
| Pin produk 22 | PAD14 — General-purpose I/O / ADC channel 14 |
| Pin produk 23 | PAD15 — General-purpose I/O / ADC channel 15 |
| Pin produk 24 | PA0 — Port A bit 0 (general I/O) |
| Pin produk 25 | PA1 — Port A bit 1 (general I/O) |
| Pin produk 26 | PA2 — Port A bit 2 (general I/O) |
| Pin produk 27 | PA3 — Port A bit 3 (general I/O) |
| Pin produk 28 | PA4 — Port A bit 4 (general I/O) |
| Pin produk 29 | PA5 — Port A bit 5 (general I/O) |
| Pin produk 30 | PA6 — Port A bit 6 (general I/O) |
| Pin produk 31 | PA7 — Port A bit 7 (general I/O) |
| Pin produk 32 | PB0 — Port B bit 0 (general I/O) |
| Pin produk 33 | PB1 — Port B bit 1 (general I/O) |
| Pin produk 34 | PB2 — Port B bit 2 (general I/O) |
| Pin produk 35 | PB3 — Port B bit 3 (general I/O) |
| Pin produk 36 | PB4 — Port B bit 4 (general I/O) |
| Pin produk 37 | PB5 — Port B bit 5 (general I/O) |
| Pin produk 38 | PB6 — Port B bit 6 (general I/O) |
| Pin produk 39 | PB7 — Port B bit 7 (general I/O) |
| Pin produk 40 | PC0 — Port C bit 0 / CAN0 TX |
| Pin produk 41 | PC1 — Port C bit 1 / CAN0 RX |
| Pin produk 42 | PC2 — Port C bit 2 / CAN1 TX |
| Pin produk 43 | PC3 — Port C bit 3 / CAN1 RX |
| Pin produk 44 | PC4 — Port C bit 4 / CAN2 TX |
| Pin produk 45 | PC5 — Port C bit 5 / CAN2 RX |
| Pin produk 46 | PC6 — Port C bit 6 / CAN3 TX |
| Pin produk 47 | PC7 — Port C bit 7 / CAN3 RX |
| Pin produk 48 | VDD — Digital supply input |
| Pin produk 49 | VSS — Digital ground |
| Pin produk 50 | PD0 — Port D bit 0 (SPI / SCI) |
| Pin produk 51 | PD1 — Port D bit 1 (SPI / SCI) |
| Pin produk 52 | PD2 — Port D bit 2 (SPI / SCI) |
| Pin produk 53 | PD3 — Port D bit 3 (SPI / SCI) |
| Pin produk 54 | PD4 — Port D bit 4 (SPI / SCI) |
| Pin produk 55 | PD5 — Port D bit 5 (SPI / SCI) |
| Pin produk 56 | PD6 — Port D bit 6 (SPI / SCI) |
| Pin produk 57 | PD7 — Port D bit 7 (SPI / SCI) |
| Pin produk 58 | PE0 — Port E bit 0 (PWM / timer) |
| Pin produk 59 | PE1 — Port E bit 1 (PWM / timer) |
| Pin produk 60 | PE2 — Port E bit 2 (PWM / timer) |
| Pin produk 61 | PE3 — Port E bit 3 (PWM / timer) |
| Pin produk 62 | PE4 — Port E bit 4 (PWM / timer) |
| Pin produk 63 | PE5 — Port E bit 5 (PWM / timer) |
| Pin produk 64 | PE6 — Port E bit 6 (PWM / timer) |
| Pin produk 65 | PE7 — Port E bit 7 (PWM / timer) |
| Pin produk 66 | PF0 — Port F bit 0 (general I/O) |
| Pin produk 67 | PF1 — Port F bit 1 (general I/O) |
| Pin produk 68 | PF2 — Port F bit 2 (general I/O) |
| Pin produk 69 | PF3 — Port F bit 3 (general I/O) |
| Pin produk 70 | PF4 — Port F bit 4 (general I/O) |
| Pin produk 71 | PF5 — Port F bit 5 (general I/O) |
| Pin produk 72 | PF6 — Port F bit 6 (general I/O) |
| Pin produk 73 | PF7 — Port F bit 7 (general I/O) |
| Pin produk 74 | PG0 — Port G bit 0 (general I/O) |
| Pin produk 75 | PG1 — Port G bit 1 (general I/O) |
| Pin produk 76 | PG2 — Port G bit 2 (general I/O) |
| Pin produk 77 | PG3 — Port G bit 3 (general I/O) |
| Pin produk 78 | PG4 — Port G bit 4 (general I/O) |
| Pin produk 79 | PG5 — Port G bit 5 (general I/O) |
| Pin produk 80 | PG6 — Port G bit 6 (general I/O) |
| Pin produk 81 | PG7 — Port G bit 7 (general I/O) |
| Pin produk 82 | PH0 — Port H bit 0 (general I/O) |
| Pin produk 83 | PH1 — Port H bit 1 (general I/O) |
| Pin produk 84 | PH2 — Port H bit 2 (general I/O) |
| Pin produk 85 | PH3 — Port H bit 3 (general I/O) |
| Pin produk 86 | PH4 — Port H bit 4 (general I/O) |
| Pin produk 87 | PH5 — Port H bit 5 (general I/O) |
| Pin produk 88 | PH6 — Port H bit 6 (general I/O) |
| Pin produk 89 | PH7 — Port H bit 7 (general I/O) |
| Pin produk 90 | PJ0 — Port J bit 0 (general I/O) |
| Pin produk 91 | PJ1 — Port J bit 1 (general I/O) |
| Pin produk 92 | PJ2 — Port J bit 2 (general I/O) |
| Pin produk 93 | PJ3 — Port J bit 3 (general I/O) |
| Pin produk 94 | PJ4 — Port J bit 4 (general I/O) |
| Pin produk 95 | PJ5 — Port J bit 5 (general I/O) |
| Pin produk 96 | PJ6 — Port J bit 6 (general I/O) |
| Pin produk 97 | PJ7 — Port J bit 7 (general I/O) |
| Pin produk 98 | PK0 — Port K bit 0 (general I/O) |
| Pin produk 99 | PK1 — Port K bit 1 (general I/O) |
| Pin produk 100 | PK2 — Port K bit 2 (general I/O) |
| Pin produk 101 | PK3 — Port K bit 3 (general I/O) |
| Pin produk 102 | PK4 — Port K bit 4 (general I/O) |
| Pin produk 103 | PK5 — Port K bit 5 (general I/O) |
| Pin produk 104 | PK6 — Port K bit 6 (general I/O) |
| Pin produk 105 | PK7 — Port K bit 7 (general I/O) |
| Pin produk 106 | PL0 — Port L bit 0 (general I/O) |
| Pin produk 107 | PL1 — Port L bit 1 (general I/O) |
| Pin produk 108 | PL2 — Port L bit 2 (general I/O) |
| Pin produk 109 | PL3 — Port L bit 3 (general I/O) |
| Pin produk 110 | PL4 — Port L bit 4 (general I/O) |
| Pin produk 111 | PL5 — Port L bit 5 (general I/O) |
| Pin produk 112 | PL6 — Port L bit 6 (general I/O) |
| Pin produk 113 | PL7 — Port L bit 7 (general I/O) |
| Pin produk 114 | PM0 — Port M bit 0 (general I/O) |
| Pin produk 115 | PM1 — Port M bit 1 (general I/O) |
| Pin produk 116 | PM2 — Port M bit 2 (general I/O) |
| Pin produk 117 | PM3 — Port M bit 3 (general I/O) |
| Pin produk 118 | PM4 — Port M bit 4 (general I/O) |
| Pin produk 119 | PM5 — Port M bit 5 (general I/O) |
| Pin produk 120 | PM6 — Port M bit 6 (general I/O) |
| Pin produk 121 | PM7 — Port M bit 7 (general I/O) |
| Pin produk 122 | PP0 — Port P bit 0 (PWM / timer) |
| Pin produk 123 | PP1 — Port P bit 1 (PWM / timer) |
| Pin produk 124 | PP2 — Port P bit 2 (PWM / timer) |
| Pin produk 125 | PP3 — Port P bit 3 (PWM / timer) |
| Pin produk 126 | PP4 — Port P bit 4 (PWM / timer) |
| Pin produk 127 | PP5 — Port P bit 5 (PWM / timer) |
| Pin produk 128 | PP6 — Port P bit 6 (PWM / timer) |
| Pin produk 129 | PP7 — Port P bit 7 (PWM / timer) |
| Pin produk 130 | PS0 — Port S bit 0 (general I/O) |
| Pin produk 131 | PS1 — Port S bit 1 (general I/O) |
| Pin produk 132 | PS2 — Port S bit 2 (general I/O) |
| Pin produk 133 | PS3 — Port S bit 3 (general I/O) |
| Pin produk 134 | PS4 — Port S bit 4 (general I/O) |
| Pin produk 135 | PS5 — Port S bit 5 (general I/O) |
| Pin produk 136 | PS6 — Port S bit 6 (general I/O) |
| Pin produk 137 | PS7 — Port S bit 7 (general I/O) |
| Pin produk 138 | VDD — Digital supply input |
| Pin produk 139 | VSS — Digital ground |
| Pin produk 140 | PT0 — Port T bit 0 (general I/O) |
| Pin produk 141 | PT1 — Port T bit 1 (general I/O) |
| Pin produk 142 | PT2 — Port T bit 2 (general I/O) |
| Pin produk 143 | PT3 — Port T bit 3 (general I/O) |
| Pin produk 144 | PT4 — Port T bit 4 (general I/O) |
Aplikasi Umum
MC9S12XET256CAG cocok untuk 6 aplikasis: 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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk MC9S12XET256CAG — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | 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 |
Diferensiator Kunci
- 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))
Catatan Desain
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.
Informasi Konformitas
Standard MC9S12XET256CAG is commercial-grade; choose the MAG/AEG/VAG suffix for AEC-Q100 automotive qualification.
