21:GD32F103TBU6
Description: CPU kernel: ARM Cortex-M3 CPU Max Main frequency: 108 MHz Program FLASH capacity: 128KB RAM Total capacity: 20KB GPIO ports number: 26 ADC (cells / channel / digits): 2@x10ch / 12bit 16 bit Timer Number: 4 U (S) ART circuit number: 2 I2C circuit
