Power Supply - STMicroelectronics STM32L152D-EVAL User Manual

UM1521
2.2

Power supply

The STM32L152D-EVAL evaluation board is designed to be powered by a 5 V DC power
supply and to be protected by PolyZen from a wrong power plug-in event.
It is possible to configure the evaluation board to use any of following four sources for the
power supply.
●
5 V DC power adapter connected to CN2, the power jack on the board (power supply
unit (PSU) on silk screen). The external power supply is not provided with the board.
●
5 V DC power with 500mA limitation from CN14, the USB type B connector of ST-
LINK/V2 (USB 5 V power source on silkscreen (ST-LINK/V2)).
●
5 V DC power with 500mA limitation from CN15, the USB type B connector (USB 5V
power source on silkscreen (USB)).
●
5 V DC power from CN10, the extension connector for daughterboard (daughterboard
power source on silkscreen (D5V)).
The LEDs indicate the following:
●
LED LD9 is lit when the STM32L152D-EVAL board is powered by 5 V correctly.
●
Red LED LD8 is lit when the MCU is powered by low voltage (VDD < 1.8 V).
●
Yellow LED LD7 is lit when the MCU is powered by voltage (1.8 V < VDD < 2.2 V).
●
Green LED LD6 is lit when the MCU is powered by voltage (2.2 V < VDD).
The power supply is configured by setting the related jumpers JP1, JP5 and JP10 as
described in
Table 2.
Jumper
JP1
www.BDTIC.com/ST
Table 2.
Power supply jumper settings
JP1 selects one of the four possible power supply sources.
– For power supply jack(CN2) to the STM32L152D-EVAL only, JP1 is set
as shown to the right:
– For power supply from the daughterboard connectors (CN10) to
STM32L152D-EVAL only, JP1 is set as shown to the right:
– For power supply from USB (CN15) to STM32L152D-EVAL only, JP1
is set as shown to the right:
– For power supply from USB connector of ST-LINK/V2 (CN14) to
STM32L152D-EVAL only, JP1 is set as shown to the right:
(Default setting)
For power supply from power supply jack (CN2) to both STM32L152D-
EVAL and daughterboard connected on CN5 and CN10, JP1 is set as
shown to the right (daughterboard must not have its own power supply
connected)
Doc ID 022868 Rev 1
Hardware layout and configuration
Description Setting
9/56