Jp2 (Idd); Osc Clock; Osc Clock Supply; Osc 32 Khz Clock Supply - ST STM32F401 User Manual

Hardware layout
The STM32F401VCT6 MCU controls this motion sensor through the SPI interface.
4.10

JP2 (Idd)

Jumper JP2, labeled Idd, allows the consumption of STM32F401VCT6 to be measured by
removing the jumper and connecting an ammeter.
•
Jumper on: STM32F401VCT6 is powered (default).
•
Jumper off: an ammeter must be connected to measure the STM32F401VCT6 current,
(if there is no ammeter, the STM32F401VCT6 is not powered).
4.11

OSC clock

4.11.1

OSC clock supply

If PH0 and PH1 are only used as GPIOs instead of as a clock, then SB14 and SB16 are
closed and R24, R25 and R66 are removed.
MCO from ST-LINK (from MCO of the STM32F103)
This frequency cannot be changed, it is fixed at 8 MHz and connected to PH0-OSC_IN of
the STM32F401VCT6. The configuration needed is:
–
–
–
Oscillator onboard (from X2 crystal)
For typical frequencies and its capacitors and resistors, please refer to the
STM32F401VCT6 Datasheet. The configuration needed is:
–
–
–
Oscillator from external PH0 (from external oscillator through pin 7 of the P2 connector)
The configuration needed is:
–
–
–
4.11.2

OSC 32 KHz clock supply

If PC14 and PC15 are only used as GPIOs instead of as a clock, then SB17 and SB18 are
closed, and R21 and R22 are removed.
Oscillator onboard (from X1 Crystal (not provided))
The configuration needed is:
–
–
20/39
SB14, SB16 OPEN
R25 removed
R66 soldered
SB14, SB16 OPEN
R25 soldered
R66 removed
SB14 closed
SB16 closed
R25 and R66 removed
SB17, SB18 OPEN
C20, C28, R21 and R22 soldered
DocID025174 Rev 1
UM1669