ATSAMD51J20A-MU

ATSAMD51J20A-MU is Microchip’s high-performance SAM D51 microcontroller. It uses a 32-bit ARM Cortex-M4F core running up to 120 MHz with DSP and FPU support, and includes on-chip Flash and SRAM (sizes depend on package).
Key features
- USB 2.0 full-speed device
- Multiple SERCOM modules (SPI/I2C/UART)
- Analog: ADC (and DAC in some variants)
- Timers, PWM, and an Event System
- Peripheral Touch Controller (PTC)
- Wide operating voltage and several low-power modes (typical 1.8–3.6 V)
- Available in MU package (QFN64)
Development and ecosystem
- Supported by Microchip Studio, MPLAB X IDE, Atmel START, and ASF4
- Suitable for USB devices, audio processing, sensors, IoT, and motor control
Notes
- Exact memory sizes and pinout depend on the specific package/revision; consult the datasheet and product page for precise specs.

Here are the key features of ATSAMD51J20A-MU (64-pin MU package):
- Core: ARM Cortex-M4F, single-precision FPU and DSP, up to 120 MHz operation.
- Memory: Up to 1 MB Flash, up to 256 KB SRAM; EEPROM emulation support.
- USB: USB 2.0 Full-Speed device (on-chip PHY).
- SERCOM: Multiple flexible SERCOM peripherals for UART, SPI, I2C (configurable pins).
- ADC/Analog: 12-bit ADC with multiple channels; additional analog features (comparators, references).
- LCD: Segment LCD controller for driving dot/segment LCDs.
- Peripherals/Bus: Event System and DMA Controller (DMAC) for peripheral-to-peripheral transfers.
- Security: Hardware crypto engine (AES/SHA) with RNG.
- Timers: Rich timer/counter options (PWM/timers) for timing and capture/compare.
- Power: Low-power modes with fine-grained power management and brown-out detection.
- Debug/Programming: SWD debug interface.
- Package/Voltage: 64-pin MU package; operates from ~1.62–3.63 V.
- Temperature: Industrial temperature range support (typical for Microchip parts).
Note: exact counts (SERCOMs, ADC channels, etc.) vary by variant; verify datasheet for precise numbers.

Package type: QFN (UQFN) – the MU suffix denotes Microchip’s QFN package.

- Pin count: 144 pins
- Function: 32-bit ARM Cortex-M4F microcontroller (SAMD51J20A) in MU package.

- Manufacturer: Microchip Technology Inc.
- What kind of company: An American multinational semiconductor company that designs, manufactures, and sells microcontrollers (including the SAM series), analog and mixed-signal devices. It acquired Atmel in 2016 and is publicly traded (NASDAQ: MCHP).

The ATSAMD51J20A-MU is a high-performance ARM Cortex-M4F MCU with USB, DSP, and rich analog peripherals. Suitable application areas include:
- Industrial automation and motor control
- USB peripherals, audio interfaces, USB-C devices
- IoT/edge devices, sensors, data logging
- Consumer electronics and wearables
- Instrumentation and medical/ambient sensing
- Robotics and smart household appliances