Table 5. Power-Supply-Related Jumpers Settings - ST STM32L4R9I User Manual

Hardware layout and configuration
USB port when the excessive current requirement from STM32L4R9I-EVAL is
detected. This causes an operating failure to STM32L4R9I-EVAL.
3. The host PC is not capable of supplying 300 mA (the enumeration fails) so ST-LINK/V2-
1 does not supply the remainder of STM32L4R9I-EVAL from its USB port V
Jumper /
solder
bridge
Power
source
selector
(JP11)
Vbat
connection
(JP8)
VDD_MCU
connection
(JP10)
VDD_USB
connection
(JP1)
22/77

Table 5. Power-supply-related jumpers settings

Setting
STM32L4R9I-EVAL is supplied via the power jack marked
PSU_DC5V (CN18). CN5 and CN6 extension connectors
do not pass the 5 V of STM32L4R9I-EVAL to the
daughterboard.
E5V U5V STlk D5V
STM32L4R9I-EVAL is supplied through the Micro-AB USB
connector (CN3). CN5 and CN6 extension connectors do
not pass the 5 V of STM32L4R9I-EVAL to the
daughterboard.
E5V U5V STlk D5V
Default setting: STM32L4R9I-EVAL is supplied through the
Micro-B USB connector (CN21). CN5 and CN6 extension
connectors do not pass the 5 V of STM32L4R9I-EVAL to the
daughterboard.
E5V U5V STlk D5V
STM32L4R9I-EVAL is supplied through pin 39 of CN5 and
pin 39 of CN6 extension connectors.
E5V U5V STlk D5V
STM32L4R9I-EVAL is supplied via the power jack (CN18).
CN5 and CN6 extension connectors pass the 5 V of
STM32L4R9I-EVAL to the daughterboard. Make sure to
disconnect from the daughterboard, any power supply that
E5V U5V STlk D5V
might generate conflict with the power supply on the power
jack (CN18).
1 2 3
Vbat is connected to the battery.
1 2 3
Default setting: Vbat is connected to VDD.
Default setting: VDD_MCU (VDD terminals of
1 2 3
STM32L4R9AII6) is connected to fixed +3.3 V.
VDD_MCU is connected to voltage in the range from
1 2 3
+1.71 V to +3.6 V, adjustable with potentiometer RV3.
Default setting: VDD_USB (VDD USB terminal of
1 2 3
STM32L4R9AII6) is connected with VDD_MCU.
2 3
1
VDD_USB is connected to +3.3 V.
UM2248 Rev 5
Configuration
UM2248
line.
BUS