This is STM32F103CBT6 Minimum System Board Microcomputer STM32 ARM Core Board. This board is a cost-effectiveSTM32F103CBT6; Core: ARM 32 Cortex-M3 CPU; Debug Mode: SWD; 72MHz work frequency.; 64K flash memory, 20K SRAM.; 2.0-3.6V power, I/O.; Reset(POR/PDR).; 4-16MHz crystal.; Onboard Mini USB interface, you can give the board power supply and USB communication; Length: 54mm; Width: 22mm; Weight: 9gm. Interface Description:- SWD interface: support for simulation, download, and debug.; Mirco USB interface: power supply and USB communication, does not support the download.; USART1 interface: USART1 can be used to download the program, or use the USART1 for communication.; MCU pin interface: leads all I / O port pins, easy to connect with peripherals.; 5V and 3.3V power input and output interface: commonly used external power supply, or with other modules for common ground treatment. A number of pins: 48; Kernel: Cortex-M3; Operating frequency: 72MHz; Storage resources: 128K Byte Flash, 20KByte SRAM; Interface Resources: 2x SPI, 3x USART, 2x I2C, 1x CAN, 37x I / O ports,; Analog-to-digital conversion: 2x ADC (12-bit / 16-channel); Timers: 3 general timers and 1 advanced timer; Debug Download: Support JTAG / SWD debug interface to download, support for IAP.; RT9193: 3.3V regulator chip, the maximum output of 300mA.

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