Hardware layout and configuration UM2408
20/51 UM2408 Rev 2
Figure 10. Power supply input from 5V_EXT (5 V, 500 mA max)
6.4.4 External power supply input from USB CHARGER (5V)
When the STM32H7 Nucleo-144 board is power supplied by a USB charger on CN1 (Refer
to
Table 7 and Figure 11), the jumper configuration must be the following: Jumper JP2 on
pin 7-8 CHGR.
Figure 11. Power supply input from ST-LINK USB connector with a USB charger (5 V)
6.4.5 External power supply input from 3V3_EXT (3.3 V)
When the 3.3V is provided by a shield board, it is interesting to use the 3.3 V (CN8 pin 7 or
CN11 pin 16) directly as a power input (Refer to
Table 8 and Figure 12). In this case, the
programming and debugging features are not available, since the ST-LINK is not powered.
Table 7. External power sources: CHGR (5 V)
Input power name Connector pins Voltage range Max current
CHGR CN1 5 V -
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