UM2408 Rev 1
21/45
UM2408
Hardware layout and configuration
44
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 STM32H7 Nucleo-144 board is power supplied by a USB charger on CN1 (see
), 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 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 power input (see
). 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
-
