MC9S12DT256CMPV - 16-Bit 50MHz Automotive MCU, 256KB Flash | NXP
MPN: MC9S12DT256CMPV ✓ Hoạt độngMC9S12DT256CMPV Tóm tắt
What is an HCS12 microcontroller? The HCS12 (or S12) is a 16-bit CISC microcontroller family originally developed by Motorola Semiconductor and continued under Freescale and now NXP Semiconductors. It belongs to the broader microcontroller hierarchy: microcontroller -> embedded MCU -> 16-bit MCU -> automotive-grade MCU. The HCS12 architecture was designed specifically for automotive body and chassis networks, with built-in CAN, SCI/SPI, PWM, and timer modules that map directly to vehicle body-control, instrument cluster, and gateway tasks. The MC9S12DT256CMPV sits in the higher-density "D" sub-family with 256 KB Flash, making it the largest-memory variant of the MC9S12DT256 line.
Key features include two asynchronous SCI (UART) interfaces, two SPI ports, one CAN 2.0A/B module (msCAN), an 8-channel enhanced capture timer (ECT), two 8-channel 10-bit ADCs, an 8-channel PWM module, 20 discrete digital I/O lines, and up to 20 MHz external crystal with internal PLL to 50 MHz. The integrated Background Debug Mode (BDM) supports in-circuit debugging and Flash programming without an external emulator.
Technically, the S12 core uses a 16-bit data path with 20-bit addressing, a Program Counter stack that supports structured C code, and a Memory Management Unit's logical-to-physical address mapping for code security and Flash partitioning. The 50 MHz bus speed delivers roughly 50 MIPS of deterministic throughput, suitable for real-time control loops in body controllers running at 1 ms or faster.
Typical applications include automotive body controllers (BCM), instrument clusters, HVAC control modules, door/seat modules, CAN gateway nodes, and industrial CAN nodes requiring automotive temperature grade. Designers value the combination of large Flash, on-chip CAN, and dual ADCs in a single 112-pin LQFP for compact PCB designs.
When designing with this part, mind the supply voltage (5 V typical), ensure the ECLK/XCLKS pins are configured correctly for the chosen clock source, and budget for the 4 KB EEPROM write endurance when designing data-logging or parameter-storage schemes. Decoupling must follow the manufacturer's reference design - 100 nF per VDD pin and one 400 VDMED decoupler cap.
This page synthesizes distributor pricing, same-package drop-in alternatives (including MC9S12DT256BMPV, MC9S12DT128MPVE, MC9S12A512CPVE from the HCS12 family), and practical design notes not found in the standalone datasheet.
Bộ thay thế dễ dàng lắp đặt cho MC9S12DT256CMPV — 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 MC9S12DT256CMPV (cùng hình factor và footprint) — khác nhau ở Package, RoHS Status, Core Processor, PWM Channels, ADC Resolution.
MC9S12DT256BMPV
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC9S12DT128MPVE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC9S12A512CPVE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC9S12DG256CCPV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC9S12A64CPVE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC9S12XEQ384CAG
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC9S12XDT512MAA
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC9S12DT256CMPV Tỷ lệ tối đa & tính chất điện
| Core Architecture | HCS12 (S12) 16-bit CISC |
| Bus Frequency | Up to 50 MHz |
| Program Flash | 256 KB |
| RAM | 12 KB |
| EEPROM | 4 KB |
| Hộp | LQFP-112 |
| Số chân | 112 |
| Operating Voltage | 5.0 V (4.5 V to 5.5 V) |
| Temperature Grade | Automotive (-40C to +125C) |
| ADC | 2 x 8-channel 10-bit |
| PWM Channels | 8 channels |
| Enhanced Capture Timer | 8-channel (ECT) |
| SCI (UART) Interfaces | 2 |
| SPI Interfaces | 2 |
| CAN Modules | 1 x msCAN (CAN 2.0A/B) |
| GPIO (Approx.) | 20 discrete digital I/O lines |
| Debug Interface | Background Debug Mode (BDM) |
| Kiểu lắp đặt | Surface Mount (LQFP, gull-wing) |
| Trạng thái RoHS | Compliant (per NXP product page) |
Cấu hình chân MC9S12DT256CMPV
| Chân 1 | TXCAN — msCAN transmit output |
| Chân 2 | RXCAN — msCAN receive input |
| Chân 3 | PAD0 — Port AD bit 0 / ATD0 analog input |
| Chân 4 | PAD1 — Port AD bit 1 / ATD0 analog input |
| Chân 5 | PAD2 — Port AD bit 2 / ATD0 analog input |
| Chân 6 | PAD3 — Port AD bit 3 / ATD0 analog input |
| Chân 7 | PAD4 — Port AD bit 4 / ATD0 analog input |
| Chân 8 | PAD5 — Port AD bit 5 / ATD0 analog input |
| Chân 9 | PAD6 — Port AD bit 6 / ATD0 analog input |
| Chân 10 | PAD7 — Port AD bit 7 / ATD0 analog input |
| Chân 11 | VSS1 — Ground (digital) |
| Chân 12 | VDD1 — Digital supply 5 V |
| Chân 13 | PA0 — Port A bit 0 / PWM channel |
| Chân 14 | PA1 — Port A bit 1 / PWM channel |
| Chân 15 | PA2 — Port A bit 2 / PWM channel |
| Chân 16 | PA3 — Port A bit 3 / PWM channel |
| Chân 17 | PA4 — Port A bit 4 / PWM channel |
| Chân 18 | PA5 — Port A bit 5 / PWM channel |
| Chân 19 | PA6 — Port A bit 6 / PWM channel |
| Chân 20 | PA7 — Port A bit 7 / PWM channel |
| Chân 21 | PB0 — Port B bit 0 / GPIO |
| Chân 22 | PB1 — Port B bit 1 / GPIO |
| Chân 23 | PB2 — Port B bit 2 / GPIO |
| Chân 24 | PB3 — Port B bit 3 / GPIO |
| Chân 25 | PB4 — Port B bit 4 / GPIO |
| Chân 26 | PB5 — Port B bit 5 / GPIO |
| Chân 27 | PB6 — Port B bit 6 / GPIO |
| Chân 28 | PB7 — Port B bit 7 / GPIO |
| Chân 29 | PC0 — Port C bit 0 / address/data bus |
| Chân 30 | PC1 — Port C bit 1 / address/data bus |
| Chân 31 | PC2 — Port C bit 2 / address/data bus |
| Chân 32 | PC3 — Port C bit 3 / address/data bus |
| Chân 33 | PC4 — Port C bit 4 / address/data bus |
| Chân 34 | PC5 — Port C bit 5 / address/data bus |
| Chân 35 | PC6 — Port C bit 6 / address/data bus |
| Chân 36 | PC7 — Port C bit 7 / address/data bus |
| Chân 37 | VSS2 — Ground (digital) |
| Chân 38 | VDD2 — Digital supply 5 V |
| Chân 39 | PE0 — Port E bit 0 / IRQ / XIRQ |
| Chân 40 | PE1 — Port E bit 1 / IRQ |
| Chân 41 | PE2 — Port E bit 2 / GPIO |
| Chân 42 | PE3 — Port E bit 3 / GPIO |
| Chân 43 | PE4 — Port E bit 4 / GPIO |
| Chân 44 | PE5 — Port E bit 5 / GPIO |
| Chân 45 | PE6 — Port E bit 6 / GPIO |
| Chân 46 | PE7 — Port E bit 7 / GPIO |
| Chân 47 | PF0 — Port F bit 0 / GPIO |
| Chân 48 | PF1 — Port F bit 1 / GPIO |
| Chân 49 | PF2 — Port F bit 2 / GPIO |
| Chân 50 | PF3 — Port F bit 3 / GPIO |
| Chân 51 | PF4 — Port F bit 4 / GPIO |
| Chân 52 | PF5 — Port F bit 5 / GPIO |
| Chân 53 | PF6 — Port F bit 6 / GPIO |
| Chân 54 | PF7 — Port F bit 7 / GPIO |
| Chân 55 | PG0 — Port G bit 0 / GPIO |
| Chân 56 | PG1 — Port G bit 1 / GPIO |
| Chân 57 | PG2 — Port G bit 2 / GPIO |
| Chân 58 | PG3 — Port G bit 3 / GPIO |
| Chân 59 | PG4 — Port G bit 4 / GPIO |
| Chân 60 | PG5 — Port G bit 5 / GPIO |
| Chân 61 | PG6 — Port G bit 6 / GPIO |
| Chân 62 | PG7 — Port G bit 7 / GPIO |
| Chân 63 | PH0 — Port H bit 0 / GPIO |
| Chân 64 | PH1 — Port H bit 1 / GPIO |
| Chân 65 | PH2 — Port H bit 2 / GPIO |
| Chân 66 | PH3 — Port H bit 3 / GPIO |
| Chân 67 | PH4 — Port H bit 4 / GPIO |
| Chân 68 | PH5 — Port H bit 5 / GPIO |
| Chân 69 | PH6 — Port H bit 6 / GPIO |
| Chân 70 | PH7 — Port H bit 7 / GPIO |
| Chân 71 | PJ0 — Port J bit 0 / GPIO |
| Chân 72 | PJ1 — Port J bit 1 / GPIO |
| Chân 73 | PJ2 — Port J bit 2 / GPIO |
| Chân 74 | PJ3 — Port J bit 3 / GPIO |
| Chân 75 | PJ4 — Port J bit 4 / GPIO |
| Chân 76 | PJ5 — Port J bit 5 / GPIO |
| Chân 77 | PJ6 — Port J bit 6 / GPIO |
| Chân 78 | PJ7 — Port J bit 7 / GPIO |
| Chân 79 | PK0 — Port K bit 0 / GPIO |
| Chân 80 | PK1 — Port K bit 1 / GPIO |
| Chân 81 | PK2 — Port K bit 2 / GPIO |
| Chân 82 | PK3 — Port K bit 3 / GPIO |
| Chân 83 | PK4 — Port K bit 4 / GPIO |
| Chân 84 | PK5 — Port K bit 5 / GPIO |
| Chân 85 | PK6 — Port K bit 6 / GPIO |
| Chân 86 | PK7 — Port K bit 7 / GPIO |
| Chân 87 | PL0 — Port L bit 0 / GPIO |
| Chân 88 | PL1 — Port L bit 1 / GPIO |
| Chân 89 | PL2 — Port L bit 2 / GPIO |
| Chân 90 | PL3 — Port L bit 3 / GPIO |
| Chân 91 | PL4 — Port L bit 4 / GPIO |
| Chân 92 | PL5 — Port L bit 5 / GPIO |
| Chân 93 | PL6 — Port L bit 6 / GPIO |
| Chân 94 | PL7 — Port L bit 7 / GPIO |
| Chân 95 | PM0 — Port M bit 0 / GPIO |
| Chân 96 | PM1 — Port M bit 1 / GPIO |
| Chân 97 | PM2 — Port M bit 2 / GPIO |
| Chân 98 | PM3 — Port M bit 3 / GPIO |
| Chân 99 | PM4 — Port M bit 4 / GPIO |
| Chân 100 | PM5 — Port M bit 5 / GPIO |
| Chân 101 | PM6 — Port M bit 6 / GPIO |
| Chân 102 | PM7 — Port M bit 7 / GPIO |
| Chân 103 | PS0 — Port S bit 0 / SPI1 / SCI1 |
| Chân 104 | PS1 — Port S bit 1 / SPI1 / SCI1 |
| Chân 105 | PS2 — Port S bit 2 / SPI1 / SCI1 |
| Chân 106 | PS3 — Port S bit 3 / SPI1 / SCI1 |
| Chân 107 | PS4 — Port S bit 4 / SPI1 / SCI1 |
| Chân 108 | PS5 — Port S bit 5 / SPI1 / SCI1 |
| Chân 109 | PS6 — Port S bit 6 / SPI1 / SCI1 |
| Chân 110 | PS7 — Port S bit 7 / SPI1 / SCI1 |
| Chân 111 | VDDR — Voltage regulator supply (5 V) |
| Chân 112 | VSS — Ground (return for VDDR) |
Ứng dụng tiêu biểu
MC9S12DT256CMPV phù hợp cho 7 Áp dụngs: Automotive Body Control Module (BCM), Instrument Cluster and HMI Driver, HVAC Control Module, CAN Gateway and Network Node, Industrial CAN Node / PLC I/O, Door Module and Seat Controller, Body Electronics - Lighting Controller.
Automotive Body Control Module (BCM)
The MC9S12DT256CMPV is engineered for automotive body-control modules where it supervises lighting, wipers, door locks, and accessory loads. Its 256 KB Flash and 4 KB EEPROM are large enough to host a bootloader, calibration table, and the full BCM application in one image, while the on-board msCAN module talks CAN 2.0A/B at 500 kbps to the rest of the vehicle network. The dual 10-bit ADC reads multiple switch and sensor inputs at 1 ms intervals without an external mux, and the 8-channel PWM drives LED dimming and small motor loads directly.
Được đề xuất
Instrument Cluster and HMI Driver
The MC9S12DT256CMPV drives automotive instrument clusters including analog gauge stepper control, LCD segment drivers, and telltale LEDs. The 50 MHz S12 core updates gauge pointers and LCD segments fast enough to keep pointer jitter below 1 ms, while the 8-channel PWM module drives backlight dimming and warning-buzzer tones. Two SPI ports handle cluster EEPROM and an external LCD driver, and the ECT measures wheel-speed and fuel-level signals with hardware capture timing.
Được đề xuất
HVAC Control Module
In automotive HVAC control modules, the MC9S12DT256CMPV manages blower-speed PWM, mode-door position sensing, and CAN communication with the BCM and engine ECU. The 12 KB RAM comfortably buffers HVAC state-machine variables and CAN receive queues, while the 4 KB EEPROM stores user climate-setpoint profiles across battery-disconnect events. Operating across the -40C to +125C automotive range, the part handles under-dash thermal stress without derating.
Được đề xuất
CAN Gateway and Network Node
The MC9S12DT256CMPV is used as a CAN gateway or network node bridging multiple CAN buses in vehicles. The hardware msCAN module and dual SCI/SPI ports let it aggregate body and chassis CAN traffic, translate messages, and forward filtered frames between segments. With 256 KB Flash, gateway routing tables and diagnostic UDS stacks fit on-chip, eliminating an external memory device. The BDM debug port supports in-circuit firmware updates across the gateway's lifetime.
Được đề xuất
Industrial CAN Node / PLC I/O
Outside automotive, the MC9S12DT256CMPV serves industrial CANopen or DeviceNet nodes, PLC digital/analog I/O modules, and motor-control edge nodes. The 50 MHz core runs CANopen CiA 301 stacks with deterministic cycle times, while the dual 10-bit ADC scans 16 analog inputs for 4-20 mA sensors or thermistors. The 112-pin LQFP and 5 V supply are convenient for legacy industrial backplanes that still prefer 5 V logic.
Được đề xuất
Door Module and Seat Controller
Door modules and seat controllers use the MC9S12DT256CMPV to drive window lifters, mirror adjust, seat motors, and puddle lamps with the 8-channel PWM. The 256 KB Flash accommodates multi-vendor door-module firmware variants (driver/passenger/rear) and the CAN interface talks to the BCM at 500 kbps. Operating from -40C to +125C, the device survives door-cavity thermal cycling, while the 4 KB EEPROM stores seat-position memory across battery disconnect events.
Được đề xuất
Body Electronics - Lighting Controller
Daytime running light, adaptive headlight, and interior lighting controllers use the MC9S12DT256CMPV to drive high-current LED strings, read ambient light sensors, and CAN-report lighting faults. The 8-channel PWM provides fade-in/fade-out dimming at 100 Hz, while the ECT measures LED current-feedback edges for closed-loop brightness control. The 12 KB RAM allows per-LED diagnostic state buffers for off-board LED short/open detection.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC9S12DT256CMPV — 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 | MC9S12DT256BMPV | MC9S12DT128MPVE | MC9S12A512CPVE | MC9S12DG256CCPV |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | LQFP-112 | LQFP-112 - same | LQFP-112 - same | LQFP-112 - same | LQFP-112 - same |
| Program Flash | 256 KB | 256 KB | 128 KB (-50%) | 512 KB (+100%) | 256 KB |
| RAM | 12 KB | 12 KB | 8 KB | 14 KB | 12 KB |
| EEPROM | 4 KB | 4 KB | 2 KB | 4 KB | 4 KB |
| Core / Max Bus Frequency | HCS12 / 50 MHz | HCS12 / 50 MHz | HCS12 / 50 MHz | HCS12 / 50 MHz | HCS12 / 50 MHz |
| CAN Modules | 1 x msCAN | 1 x msCAN | 1 x msCAN | 1 x msCAN | 1 x msCAN |
| ADC | 2 x 8-ch 10-bit | 2 x 8-ch 10-bit | 2 x 8-ch 10-bit | 2 x 8-ch 10-bit | 2 x 8-ch 10-bit |
| Temperature Grade | Automotive (-40C to +125C) | Automotive (-40C to +125C) | Automotive (-40C to +125C) | Automotive (-40C to +125C) | Automotive (-40C to +125C) |
Bảo phân biệt quan trọng
- Largest on-chip Flash in the MC9S12DT256 sub-family (vsMC9S12DT128MPVE)
- Latest C mask revision with errata fixes (vsMC9S12DT256BMPV)
- Drop-in upgrade path to higher-memory variant (vsMC9S12A512CPVE)
Ghi chú thiết kế
Estimated: With VIN=5 V, I_core ~ 50 mA active and 1 mA stop, the MCU's internal VDDR regulator dissipates up to 0.25 W. Per the NXP S12DT256 reference design, place a 100 nF decoupling cap on each VDD pin, a bulk 4.7 uF tantalum on VDDR, and a ferrite bead on the analog AVDD rail. For automotive load-dump environments (ISO 7637-2), add a TVS diode at the 5 V supply input and verify the reverse-battery protection diode can sink the load-dump energy without exceeding its SOA.
Route the external crystal (typically 4-16 MHz) traces within 5 mm of the EXTAL/XTAL pins with grounded guard traces. Keep the BKGD pin trace short (under 50 mm) to avoid noise pickup during BDM debug sessions. Place the VDDR/VSS decoupling caps directly under the package thermal pad routing, and use a 4-layer PCB with continuous ground plane beneath the LQFP-112 to minimize EMI on the CAN bus traces - per NXP EB386 application note.
Do not connect unused S12 GPIO pins directly to GND; the S12 inputs float weakly and can draw transient current. Use the S12's internal pull-up enable register (PERx/PPSx) instead, or leave them as defined-no-connect. Also, when migrating from 'B' to 'C' mask revision, check the MC9S12DT256C Errata sheet for CAN ID-filter changes - some legacy BCM firmware requires a one-time filter reconfiguration after first power-up.
Thông tin tuân thủ
AEC-Q100 qualified per NXP automotive MCU certification. Lead-free and halogen-free per NXP material declaration. Drop-in alternatives share the same LQFP-112 footprint.
