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1. STM32F103VET6: the high performance STM32 MCU which features:
   • Core: ARM Cortex-M3 32-bit RISC
   • Operating Frequency: 72MHz, 1.25 DMIPS/MHz
   • Operating Voltage: 2-3.6V
   • Package: LQFP100
   • I/Os: 80
   • Memories: 512K Flash, 64K RAM
   • Communication Interfaces: 3xSPI, 5xUSART, 2xI2S, 2xI2C, 1xFSMC, 1xLCD, 1xSDIO, 1xUSB, 1xCAN
   • AD & DA converters: 3xAD(12bit, 1μs, shares 16 channels); 2xDA(12bit)
   • Debugging/Programming: supports JTAG/SWD (serial wire debug) interfaces, supports IAP
2. AMS1117-3.3V: 3.3V voltage regulator
3. Power indicator
4. LEDs: Convenient for indicating I/O status or program debugging running state
5. Reset button
6. User keys
7. Joystick: five positions
8. 8M crystal oscillator
9. 32.768K crystal, used for internal RTC, also supports clock calibration
10. JTAG/SWD interface: for debugging/programming
11. USB connector, used for establishing USB communication between PC and the STM32 development board
12. USART2 connector, supports ISP (In-System Programming) through USART2, as well as system signal output
13. IO expander, all the MCU pins are accessible on expansion connectors for further expansion
14. Power input/output header, 5V/3.3V, usually used for power output, or common ground with other user board
15. 5V DC power jack
16. Boot mode selection: for configuring the BOOT0 and BOOT1 pins
17. Power supply switch, powered from 5V DC jack or USB connection
18. USB enable jumper
    • Short the jumper to enable the PC auto detection while USB connecting
    • Open the jumper to disable
19. VBAT selection jumper
    • Short the jumper to use system power supply
    • Open the jumper to connect the VBAT to external power, such as battery
20. VREF jumper
• Short the jumper to connect VREF+/VREF- respectively to VCC/GND
21. User LEDs jumper
    • Short the jumper to connect to I/Os that used in example code
    • Open the jumper to connect to other custom pins via jumper wires
22. User keys jumper
    • Short the jumper to connect to I/Os that used in example code
    • Open the jumper to connect to other custom pins via jumper wires
23. Joystick jumper
    • Short the jumper to connect to I/Os that used in example code
    • Open the jumper to connect to other custom pins via jumper wires

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