The ATSAML11D16A-YU is an Arm Cortex-M23 microcontroller which is part of Microchip's SAML11 product family. It is a low-power, 32-bit MCU with a maximum operating frequency of 64MHz. It features 256K of Flash memory, 32K of SRAM, an ultra low-power RTC and 10 general-purpose timers. It also features an optimized security architecture and supports AES, SHA and true random number generation (TRNG). The device supports a wide range of peripheral interfaces, including I2C, SPI, USB, CAN and UART, as well as GPIO, ADC, and PWM. The device offers a wide range of features and is suitable for a variety of applications including low-power Bluetooth, wearables, sensor networks, and home and industrial automation.