ATSAMD51J18A-AUT - 120MHz Cortex-M4F MCU 256KB Flash | Microchip
MPN: ATSAMD51J18A-AUT ✓ Hoạt độngATSAMD51J18A-AUT Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash), data memory (SRAM), and integrated peripherals such as timers, communication interfaces, and analog blocks. The ARM Cortex-M4F architecture belongs to the ARM Cortex-M family, designed for deterministic real-time embedded applications; the 'F' denotes an integrated single-precision Floating Point Unit (FPU). MCUs sit within the broader category of embedded processors, sitting below application processors in computational complexity but offering lower power, deterministic interrupt response, and a smaller footprint ideal for IoT, motor control, and HMI designs.
Key features include a 120 MHz Cortex-M4F core with FPU and DSP extensions, 256 KB dual-panel Flash with ECC, up to 128 KB SRAM with ECC, six SERCOM configurable serial interfaces supporting I2C/SPI/UART, a high-speed USB 2.0 Full-Speed device/host port, one CAN-FD controller, a 12-bit 1 MSPS ADC, two 12-bit DACs, and a Real-Time Clock (RTC). The device also integrates an Event System, SleepWalking peripherals for low-power operation, and a Self-Programming Flash controller for in-field OTA updates.
The SAM D51 architecture combines deterministic Cortex-M4F processing with Microchip's extensive SmartConnect peripheral IP, enabling flexible pin-mapping through SERCOM multiplexing. The dual-panel Flash with ECC supports robust code execution in noisy automotive and industrial environments, while the FPU accelerates floating-point math for sensor fusion, motor control, and DSP audio workloads without burdening the CPU.
Typical applications include automotive body electronics and HMI, industrial IoT sensor nodes, USB human-interface devices (keyboards, mice, touch panels), CAN-FD nodes, motor control with FPU-based field-oriented control, and portable consumer devices. The automotive-grade temperature range and CAN-FD support make this part especially attractive for vehicle gateway and infotainment subsystems.
When designing with this device, plan the SERCOM multiplexing carefully because six SERCOM channels can each be mapped to multiple pin sets; this flexibility simplifies PCB layout but requires reference to the device pinout table to avoid conflicts. Provide a clean 3.3V LDO with adequate decoupling (100 nF + bulk) near the VDD pins to support core and I/O switching transients.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho ATSAMD51J18A-AUT — 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 ATSAMD51J18A-AUT (cùng hình factor và footprint) — khác nhau ở SRAM, DAC, USB, Operating Temperature, Package.
ATSAMD51J19A-AUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD51J18A-AU-EFP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD51J18A-AUT-EFP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD51J20A-AUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD51N20A-AUT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATSAMD51J18A-AUT Tỷ lệ tối đa & tính chất điện
| Core Architecture | ARM Cortex-M4F with FPU and DSP |
| Maximum CPU Clock | 120 MHz |
| Bit Width | 32-bit |
| Program Flash | 256 KB (with ECC) |
| SRAM | 128 KB (with ECC) |
| Supply Voltage (VDD) | 1.71 V to 3.6 V |
| Nhiệt độ hoạt động | -40C to +85C (AUT automotive grade) |
| Hộp | 64-pin TQFP (10x10 mm) |
| Kiểu lắp đặt | Surface Mount |
| SERCOM Channels | 6 (configurable UART/SPI/I2C) |
| USB | USB 2.0 Full-Speed Device/Host |
| CAN | 1 x CAN-FD |
| ADC | 12-bit, up to 1 MSPS |
| DAC | 2 x 12-bit |
| Cấp MSL | MSL3 (per JEDEC J-STD-020) |
| Trạng thái RoHS | Compliant |
| AEC-Q100 | Automotive grade (AUT suffix) |
Cấu hình chân ATSAMD51J18A-AUT
| Chân 1 | PA00 — GPIO/port pin with SERCOM0 capability |
| Chân 2 | PA01 — GPIO/port pin with SERCOM0 capability |
| Chân 3 | PA02 — GPIO/port pin with SERCOM0 capability |
| Chân 4 | PA03 — GPIO/port pin with SERCOM0 capability |
| Chân 5 | PA04 — GPIO/port pin with SERCOM0 capability |
| Chân 6 | PA05 — GPIO/port pin with SERCOM0 capability |
| Chân 7 | PA06 — GPIO/port pin with SERCOM0 capability |
| Chân 8 | PA07 — GPIO/port pin with SERCOM0 capability |
| Chân 9 | VDDIO — I/O supply voltage (1.71V-3.6V) |
| Chân 10 | GND — Ground reference |
| Chân 11 | PA08 — GPIO/port pin with SERCOM1 capability |
| Chân 12 | PA09 — GPIO/port pin with SERCOM1 capability |
| Chân 13 | PA10 — GPIO/port pin with SERCOM1 capability |
| Chân 14 | PA11 — GPIO/port pin with SERCOM1 capability |
| Chân 15 | PA12 — GPIO/port pin with SERCOM1 capability |
| Chân 16 | PA13 — GPIO/port pin with SERCOM1 capability |
| Chân 17 | PA14 — GPIO/port pin with SERCOM1 capability |
| Chân 18 | PA15 — GPIO/port pin with SERCOM1 capability |
| Chân 19 | PA16 — GPIO/port pin with SERCOM2 capability |
| Chân 20 | PA17 — GPIO/port pin with SERCOM2 capability |
| Chân 21 | PA18 — GPIO/port pin with SERCOM2 capability |
| Chân 22 | PA19 — GPIO/port pin with SERCOM2 capability |
| Chân 23 | PA20 — GPIO/port pin with SERCOM2 capability |
| Chân 24 | PA21 — GPIO/port pin with SERCOM2 capability |
| Chân 25 | PA22 — GPIO/port pin with SERCOM3 capability |
| Chân 26 | PA23 — GPIO/port pin with SERCOM3 capability |
| Chân 27 | PA24 — GPIO/port pin with SERCOM3 capability |
| Chân 28 | PA25 — GPIO/port pin with SERCOM3 capability |
| Chân 29 | PA26 — GPIO/port pin with SERCOM3 capability |
| Chân 30 | PA27 — GPIO/port pin with SERCOM3 capability |
| Chân 31 | PA28 — GPIO/port pin with SERCOM4 capability |
| Chân 32 | PA29 — GPIO/port pin with SERCOM4 capability |
| Chân 33 | PA30 — GPIO/port pin with SERCOM4 capability |
| Chân 34 | PA31 — GPIO/port pin with SERCOM4 capability |
| Chân 35 | PB00 — GPIO/port pin with SERCOM5 capability |
| Chân 36 | PB01 — GPIO/port pin with SERCOM5 capability |
| Chân 37 | PB02 — GPIO/port pin with SERCOM5 capability |
| Chân 38 | PB03 — GPIO/port pin with SERCOM5 capability |
| Chân 39 | PB04 — GPIO/port pin with SERCOM5 capability |
| Chân 40 | PB05 — GPIO/port pin with SERCOM5 capability |
| Chân 41 | PB06 — GPIO/port pin with SERCOM5 capability |
| Chân 42 | PB07 — GPIO/port pin with SERCOM5 capability |
| Chân 43 | PB08 — GPIO/port pin, no SERCOM |
| Chân 44 | PB09 — GPIO/port pin, no SERCOM |
| Chân 45 | PB10 — GPIO/port pin, no SERCOM |
| Chân 46 | PB11 — GPIO/port pin, no SERCOM |
| Chân 47 | PB12 — GPIO/port pin, no SERCOM |
| Chân 48 | PB13 — GPIO/port pin, no SERCOM |
| Chân 49 | PB14 — GPIO/port pin, no SERCOM |
| Chân 50 | PB15 — GPIO/port pin, no SERCOM |
| Chân 51 | VDDCORE — Core supply voltage (1.2V nominal from internal LDO) |
| Chân 52 | GND — Ground reference |
| Chân 53 | VDDIO — I/O supply voltage (1.71V-3.6V) |
| Chân 54 | PB16 — GPIO/port pin, no SERCOM |
| Chân 55 | PB17 — GPIO/port pin, no SERCOM |
| Chân 56 | PB18 — GPIO/port pin, no SERCOM |
| Chân 57 | PB19 — GPIO/port pin, no SERCOM |
| Chân 58 | PB20 — GPIO/port pin, no SERCOM |
| Chân 59 | PB21 — GPIO/port pin, no SERCOM |
| Chân 60 | PB22 — GPIO/port pin, no SERCOM |
| Chân 61 | PB23 — GPIO/port pin, no SERCOM |
| Chân 62 | VDDIO — I/O supply voltage (1.71V-3.6V) |
| Chân 63 | GND — Ground reference |
| Chân 64 | RESET — Reset input, active low |
Ứng dụng tiêu biểu
ATSAMD51J18A-AUT phù hợp cho 6 Áp dụngs: Automotive Body Electronics, Industrial IoT Sensor Hub, USB HID Human Interface Device, Motor Control with FPU, Portable Consumer Device, Audio DSP Processing Node.
Automotive Body Electronics
The ATSAMD51J18A-AUT fits automotive body electronics with its -40C to +85C automotive grade, 120 MHz Cortex-M4F core, and on-chip CAN-FD controller operating up to 8 Mbps. The 256 KB Flash with ECC supports robust OSEK/Autosar-style firmware with error correction that protects against soft-bit errors in noisy 12V vehicle environments. SERCOM channels multiplex to UART for LIN-to-CAN gatewaying, while the Event System enables deterministic interrupt response for window lifters, seat controllers, and lighting modules. The FPU accelerates PID math for motor-position control on door mirrors and seat adjusters without burdening the CPU.
Được đề xuất
Industrial IoT Sensor Hub
The ATSAMD51J18A-AUT serves industrial sensor hubs with 6 SERCOM channels for connecting I2C sensors, SPI ADCs, and UART radios simultaneously. The 120 MHz Cortex-M4F with FPU executes sensor fusion math for IMU integration at sub-millisecond rates, while the 12-bit 1 MSPS ADC digitizes analog sensor signals alongside. SmartConnect SERCOM multiplexing allows any of six channels to bind to multiple pin sets, simplifying PCB routing on space-constrained sensor boards. USB Full-Speed Device enables USB-C powered industrial probes with HID data streaming to host PCs.
Được đề xuất
USB HID Human Interface Device
The ATSAMD51J18A-AUT is well-suited to USB HID keyboards, mice, touch panels, and gaming peripherals with its integrated USB 2.0 Full-Speed Device port supporting HID, CDC, MSC, and vendor-class endpoints. The 120 MHz Cortex-M4F handles USB stack plus scan-matrix polling and lighting effects simultaneously without throttling. The 256 KB Flash accommodates USB stacks from Microchip ASF or third-party TinyUSB with room for vendor-specific lighting profiles, while 128 KB SRAM is sufficient for HID ring buffers and debouncing state.
Được đề xuất
Motor Control with FPU
The ATSAMD51J18A-AUT drives brushless DC and stepper motors via its FPU-accelerated math and PWM outputs from TCC timer/counter channels. Field-oriented control (FOC) algorithms using Park/Clarke transforms run in single-precision floating point at 120 MHz without integer scaling tricks, simplifying development. The 12-bit 1 MSPS ADC samples phase currents through the on-chip PGA simultaneously with PWM, while SERCOM provides SPI to external gate drivers and UART for encoder feedback. CAN-FD enables real-time torque commands from a vehicle or robot controller.
Được đề xuất
Portable Consumer Device
The ATSAMD51J18A-AUT powers portable consumer devices with its SleepWalking peripherals that wake only active sensor blocks while keeping the core idle, extending battery life on coin-cell or Li-Po supplies. The 1.71V-3.6V supply range tolerates direct Li-Ion battery connection without external LDO, and the on-chip DC-DC buck converter input supports efficient 3.3V generation from single-cell Li-Ion. The 256 KB Flash fits BLE+ sensor-stack firmware with room for OTA patches, while 128 KB SRAM buffers audio or display frames.
Được đề xuất
Audio DSP Processing Node
The ATSAMD51J18A-AUT handles audio DSP workloads with its Cortex-M4F DSP extensions and single-precision FPU running SIMD instructions at 120 MHz. The 12-bit dual DACs generate audio outputs directly from the MCU while the 12-bit 1 MSPS ADC captures microphone or line inputs simultaneously, enabling full-duplex audio paths. SERCOM channels configure as I2S to external codec ICs at 48 kHz sample rates, and the Event System triggers DMA-driven audio block transfers without CPU intervention for low-latency processing.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAMD51J18A-AUT — 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 | ATSAMD51J19A-AUT | ATSAMD51J18A-AU | ATSAMD51J18A-AUT-EFP | ATSAMD51J20A-AUT | ATSAMD51N20A-AUT |
|---|---|---|---|---|---|---|
| Package | 64-pin TQFP (10x10 mm) | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Core | Cortex-M4F @ 120 MHz | Cortex-M4F @ 120 MHz - same | Cortex-M4F @ 120 MHz - same | Cortex-M4F @ 120 MHz - same | Cortex-M4F @ 120 MHz - same | Cortex-M4F @ 120 MHz - same |
| Flash | 256 KB | 512 KB | 256 KB - same | 256 KB - same | 1 MB | 1 MB |
| SRAM | 128 KB | 256 KB | 128 KB - same | 128 KB - same | 256 KB | 256 KB |
| Operating Temperature | -40C to +85C (AUT) | -40C to +85C (AUT) | -40C to +85C (AU commercial) | -40C to +85C (AUT-EFP) | -40C to +85C (AUT) | -40C to +85C (AUT) |
| SERCOM Channels | 6 | 6 - same | 6 - same | 6 - same | 6 - same | 6 - same |
| USB | FS Device/Host | FS Device/Host - same | FS Device/Host - same | FS Device/Host - same | FS Device/Host - same | FS Device/Host - same |
| CAN-FD | 1 channel | 1 channel - same | 1 channel - same | 1 channel - same | 1 channel - same | 1 channel - same |
| Supply Voltage | 1.71V to 3.6V | 1.71V to 3.6V - same | 1.71V to 3.6V - same | 1.71V to 3.6V - same | 1.71V to 3.6V - same | 1.71V to 3.6V - same |
Bảo phân biệt quan trọng
- Higher Flash and SRAM headroom for USB host and OTA stacks (vsATSAMD51J18A-AU)
- Pin-to-pin compatible across the SAM D51 64-pin TQFP family (vsATSAMD51G18A-MFT)
- Cortex-M4F with FPU and DSP at 120 MHz (vsATSAMD21J18A-AUT)
Ghi chú thiết kế
The ATSAMD51J18A-AUT integrates a 1.2V core LDO fed from VDDIO. Place a 1uF X7R ceramic bypass cap on each VDDIO pin and a 10uF bulk cap near the package. The internal LDO can be bypassed via the BUCKCTRL register for lower power consumption, in which case an external 1.2V supply must drive VDDCORE. Avoid daisy-chaining VDDIO pins without individual bypass capacitors - high-speed SERCOM switching transients can corrupt logic levels if decoupling is inadequate.
Route SERCOM differential pairs (USB D+/F-) as 90 ohm differential with continuous reference ground plane, keeping total length under 50 mm to meet USB Full-Speed signal integrity. The 64-pin TQFP-10x10 mm land pattern requires 0.5 mm pitch traces; escape route the inner pins on inner layers with microvias. Place the 12 MHz crystal within 5 mm of the XIN/XOUT pins and guard the traces with a ground fence to attenuate radiated emissions into the antenna traces.
A common pitfall when migrating from ATSAMD21 to ATSAMD51 is forgetting to enable the FPU via the FPU_CPACR register - leaving it disabled causes hard faults on any float math. Another frequent issue: SERCOM pads must be explicitly configured via PORT->Group[n].PMUX muxsel field before SERCOM can use them; assuming default GPIO behavior prevents I2C/SPI/UART from working. Finally, the 256 KB dual-bank Flash requires careful linker script configuration to avoid overlapping BOOT and APP regions when using the NVMCTRL for OTA updates.
Thông tin tuân thủ
AUT suffix denotes automotive temperature grade -40C to +85C. RoHS and REACH compliant per Microchip product page. AEC-Q100 qualified per automotive suffix in part number.
