External Power Supply Input From A Usb Charger (5 V); External Power Supply Input From 3V3_Ext (3.3 V); Table 8. External Power Sources: Chgr (5 V); Figure 12. Power Supply Input From 5V_Ext (5 V, 500 Ma Max) - STMicroelectronics STM32H7 User Manual

Hardware layout and configuration
6.4.4

External power supply input from a USB charger (5 V)

When the STM32H7 Nucleo-144 board is power supplied by a USB charger on CN1 (refer
to Table 8
Input power name
CHGR

Figure 13. Power supply input from STLINK-V3E USB connector with a USB charger (5 V)

6.4.5

External power supply input from 3V3_EXT (3.3 V)

When the 3.3 V is provided by a shield board, it is interesting to use the 3V3 (CN8 pin 7 or
CN11 pin 16) directly as power input (refer to
programming and debugging features are not available, since the STLINK-V3E is not
powered.
22/49

Figure 12. Power supply input from 5V_EXT (5 V, 500 mA max)

5V_EXT
and Table 13), the jumper configuration must be JP2 [7-8] CHGR.

Table 8. External power sources: CHGR (5 V)

Connector pins
CN1
3V3
U2
Voltage range
USB CHARGER
CN1
NO DEBUG
3V3
Table 9 and
UM2407 Rev 3
3V3
Max current
5 V
5V
3V3
Figure 14). In this case,
UM2407
MSv61205V2
-
MSv61206V3