Main Features:<br />On-board STM32F103RBT6 chip<br />On-board JTAG interface and reset bottom<br />On-board 32.768 KHZ and 8 MHZ crystal vibration<br />Support 5V switchable 3.3V chip AMS1117-3.3 <br />With a group of RS232 serial port， UART1 and UART2 can through jumper settings<br />All IO port are educed， and mark the I / O name<br />Support USB and Jlink power supply<br /><br />    Specifications<br />General<br />	 Type: Development board                                                  <br />                        Model: STM32F103RBT6                                                  <br />                        Material: Copper + components                                                	<br />Electronic Components<br />	 Operating Voltage: 3.3-5V                                                	<br />Weight and Size<br />	 Product Weight: 0.044 kg                                                  <br />                        Package Weight: 0.17 kg                                                  <br />                        Product Size(L x W x H): 9.2 x 7 x 2 cm / 3.6 x 2.8 x 0.8 inches                                                  <br />                        Package Size(L x W x H): 17 x 11.5 x 3 cm                                                	<br />Package Contents<br />	 Package Contents: 1 x Development Board                                                	<br /><br /><br /><br />                                                <br />