STMicroelectronics Nucleo Development Board for STM32 Microcontrollers NUCLEO-F103RB NUCLEO-F103RB Fiche De Données

DocID025833 Rev 3

There are two ways to manage the external low-speed clock (LSE):


On-board oscillator (not provided): X2 crystal with the following characteristics: 
32.768

 

kHz, 12.5 PF, 20 PPM, and SM308 footprint

The following configuration is needed:
–

SB48, SB49 OFF

–

R34 and R36 soldered.

–

C31, C32 soldered with 10pF capacitors

Oscillator from external PC14: from external oscillator through the pin 25 of 
CN7connector. 

The following configuration is needed:
–

SB48, SB49 ON

–

R34 and R36 removed

If PC14 and PC15 are used as GPIOs instead of being used as clock:
–

SB48 and SB49 are ON, and 

–

R34 and R36 are removed (default configuration).

The USART interface of STM32 microcontroller on STM32 Nucleo board can be connected 
to ST-LINK MCU, or STMicroelectronics Morpho connector or to Arduino connector. The 
choice can be changed by setting the related solder bridges. By default the USART 
communication between the target MCU and ST-LINK MCU is enabled in order to support 
Virtual Com Port for mbed (SB13 and SB14 ON, SB62 and SB63 OFF). If the 
communication between the target MCU and shield or extension board is required, SB62 
and SB63 should be ON, SB13 and SB14 should be OFF.

Part number example:

ETMB32.768B125B

Manufacturer:

BEIJING JINGYUXING TECHNOLOGY Co., Ltd.

Website:

http://en.jfvny.com/