6.1 Power supply management
6.1.1 5 V power supply
STM32MP157F-EV1 Evaluation board is designed to be powered from the 5 V DC power supply provided in the
package.
MB1263/LD1 Green LED turns on when this power supply is connected to the power jack MB1263/CN1.
Figure 5. 5 V power supply connector: MB1263/CN1
6.1.2 Platform power tree
All supply lines required for the operation of the components on STM32MP157F-EV1 are derived from the 5 V
power source. Indeed, this 5 V power source is the input supply of the STPMIC1
that distributes then all the
supplies to the subsystems as described in the power tree Figure 6.
The voltage on the VBAT pin of the STM32MP157FAA1 can be provided by an external battery. Use MB1263/BT1
to plug a CR1220 3 V lithium battery. Table 7 describes the HW configuration for the VBAT connection.
Table 7. HW configuration for the VBAT connection
Jumpers Setting
Configuration
(1)
MB1263/JP3
JP3[1-2] VBAT connected to VDD
JP3[2-3] VBAT connected to CR1220 battery holder MB1263/BT1
1.
Default configuration in bold
UM2648
Power supply management
UM2648 - Rev 1
page 11/61
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