1 Stable Operation: Equipped with an independent crystal oscillator, the microcontroller enables operation with more stability. 2 More Interface: Compared to Femto, the microcontroller board for XIAO has been added with SPI interface, very useful. 3 Better Utility: USB Type C interface has better usability than USB mini, so it can be applied to arm systems, USB development, etc. 4 Practical Use: Extra power PAD makes it possible to power with lithium battery and help achieve truly portable functions. 5 Strong Function: User LED is also added to make it much easier for program debugging, making the microcontroller more functional. Item Type: Microcontroller Material: PCB Working Voltage: DC 5V CPU: ARM Cortex-MOand CPU (SAMD21G18) 48MHZ Storage: 256KB Flash, 32KB SRAM I or O Pins: 14 pins. 11 analog and digital pins, 1 for DAC function and 10 for PWM function. 1 I2C pin. 1 UART pin. 1 SPI pin. Interface: USB Type C power and download interface, 1 user lamp, 1 power , 2 download lamps. Function: Used to control the single chip arm microcomputer system. Applicable Scenarios: For MCU, arm system, portable device, USB development. Package List 1 x Motherboard 2 x Pin Header Note Do not use in a humid environment. Unlock your potential with this powerful and versatile microcontroller. Features stable operation, multiple interfaces, and easy debugging. Ideal for ARM systems, USB development, and portable device projects.