Table 8. Vdd_Mcu Power Selection; Figure 15. Vdd_Mcu Power Selection Schematics - ST STM32L562E-DK User Manual

VDD_MCU selection
VDD_MCU used to supply the STM32 can be powered by the U46 DC-DC converter (3V3) by setting JP3 [1-2], or
by the U44 DC-DC converter (1V8) by setting JP3 [2-3]. For both configurations, the SW1 must be in the VDD
position.
Energy meter tools can also power VDD_MCU. To use the energy meter tools, follow the configuration below:
• Set the SW1 switch to the position PM_MEAS.
• Power the board through the 5V_PM with the USB connector (CN16).
• JP4 jumper must be on pin [7-8] to select the 5V_PM power source on the JP4 silkscreen.
With this configuration, it is recommended to set JP3 to the correct position, 3V3 or 1V8, to respect the I/O level
compatibility between MCU and onboard I/Os.
The VDD_MCU power selection schematic is described in
Figure 15 details the VDD_MCU power selection.
JP6
SW1 [1-2] [5-6]
JP3 [1-2]
SW1 [2-3] [6-7]
SW1 [1-2] [5-6]
JP3 [2-3]
SW1 [2-3] [6-7]
JP3 [x-x] SW1 [2-3] [6-7]
1. The default configuration is shown in bold.
UM2617 - Rev 7
Figure 15. VDD_MCU power selection schematics
Table 8. VDD_MCU power selection
SW1
Definition
DCDC U46 3V3
NA
U44 DC-DC 1V8
NA
Current measurement selection
Figure 15.
(1)
U46 is used to provide 3V3 VDD_MCU.
U46 is used to provide 3V3 only for the onboard
device, not the MCU.
U44 is used to provide 1V8 VDD_MCU.
U44 is used to provide 3V3 only for the onboard
device, not the MCU.
The energy metering part is used to supply
VDD_MCU and to measure current consumption.
UM2617
Power supply
Comment
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