Mini System Development Board STM32 Module Electronic Component with Pin Header Item Type: Development Board Material: PCB Purpose: Suitable for operation learning and development of college students, engineers, technicians, factories, individual DIY, electronic enthusiasts, etc. Number Of Pins: 114 Core: ARM 32-bit Cortex-M1+FPU Working Frequency: 168MHz Storage Source: 1021K Byte Flash, 192KBvte RAM Interface Source: 3 x SPI, 4 x USART, 2 x UART, 3 x 12C, 2 x CAN, 114 x I/O port, 2 x USB (OTG), 1 x SDIO, 2 x I2S, 1 x 10/100 Ethernet Media Access Controller, 1 x DCMI (digital camera interface)Analog-to-Digital Conversion: 3 x ADC (12 bits/21 channels) Digital-to-Analog Conversion: 2 x DAC (12 bits/2 channels) Timer: 10 x general-purpose timer 2 x advanced timer 2 x basic timer Debug Download: Support JTAG/SWD debug download through port Working Voltage: 1.8-3.6V SWD Interface: Support simulation, download and debugging Reset Button: Used for the user to reset the chip program BOOT Setting (" 1 "for The Letter End, " 0 " for The Number end, and " 0 " for factory default) There are three ways: User flash memory/SRAM/system memory User LED (PG15): Convenient for 1/0 output test or indicating program running status Power LED (PWR): Power indicator status, it can be judged whether the power is stable. Mirco USB Port: Power supply and USB communication function, does not support program download.