OLIMEX© 2015
STM32-P405 user's manual
6.4.9 3.3V_MCU_E jumper
Connects 3.3V regulated voltage to STM32F405 power pins. The 3.3V_MCU_E jumper is usually used
to measure the current consumption of the microcontroller. It is not recommended to disconnect this
jumper.
The default state of the jumper is closed.
6.5 Additional hardware components
The hardware components below are mounted on STM32-P405 but are not discussed above. These are
listed here for completeness:
RESET button –
used for hardware reset of the board; typically cannot be re-programmed; connected to
STM32F405's pin #7 (NRST);
WAKE-UP button
– customizable button; can be re-programmed by the user – connected to
STM32F405's pin #14 (PA0); also available at the first pad of jumper CTS_E;
PWR LED
– indicates when the board is powered; cannot be re-programmed; it is not connected to the
main microcontroller;
STAT LED
– customizable LED; can be re-programmed by the user – connected to STM32F405's pin
#53 (PC12); also available at male header of the board and the prototype aread; this LED can also be
disabled if you disconnect jumper LED_E; the jumper pads can also be used for measurements.
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