User manual

Hardware layout and configuration UM1724
18/61 DocID025833 Rev 9
5.5 Push buttons
B1 USER: the user button is connected to the I/O PC13 (pin 2) of the STM32
microcontroller.
B2 RESET: this push button is connected to NRST, and is used to RESET the STM32
microcontroller.
Note: The blue and black plastic hats that are placed on the push buttons can be removed if
necessary, for example when a shield or when an application board is plugged on top of
NUCLEO. This will avoid pressure on the buttons and consequently a possible permanent
target MCU RESET.
5.6 JP6 (IDD)
Jumper JP6, labeled IDD, is used to measure the STM32 microcontroller consumption by
removing the jumper and by connecting an ammeter.
• Jumper ON: STM32 microcontroller is powered (default).
• Jumper OFF: an ammeter must be connected to measure the STM32 microcontroller
current. If there is no ammeter, STM32 microcontroller is not powered.OSC clock
5.6.1 OSC clock supply
There are four ways to configure the pins corresponding to external high-speed clock
external high-speed clock (HSE):
• MCO from ST-LINK: MCO output of ST-LINK MCU is used as input clock. This
frequency cannot be changed, it is fixed at 8 MHz and connected to PF0/PD0/PH0-
OSC_IN of STM32 microcontroller.
The following configuration is needed:
– SB55 OFF
– SB16 and SB50
ON
– R35 and R37
removed
• HSE oscillator on-board from X3 crystal (not provided): for typical frequencies and
its capacitors and resistors, refer to STM32 microcontroller datasheet. Please refer to
the AN2867 for oscillator design guide for STM32 microcontrollers.
9SL8000016AFXHF0 manufactured by Hong Kong X'tals Limited.
The following configuration is needed:
– SB54 and SB55 OFF
– R35 and R37 soldered
– C33 and C34 soldered
– SB16 and SB50
OFF
• Oscillator from external PF0/PD0/PH0: from an external oscillator through pin 29 of
the CN7 connector.
The following configuration is needed:
–SB55 ON
–SB50
OFF