This 30pins board uses the silicon labs CP2102 chip as is its USB TO UART bridge controller.This chip facilitates communication between the board’s microcontroller and a computer’s USB port, which is essential for programming and serial communication/debugging.
Connectivity: It usually features a Mini-USB (or sometimes Micro-USB or USB-C,)
Operating Voltage:3.5v to 5v
Flash Memory: 32 KB
SRAM: 2 KB.
EEPROM: 1KB
Clock speed;16 MHz.