STMicroelectronics STM32H7 - Power Supply

UM2407 Rev 3 19/49
UM2407 Hardware layout and configuration
48
6.4 Power supply
Five different sources can provide the power supply:
• A host PC connected to CN1 through a USB cable (default setting)
• An external 7 to 12 V power supply connected to CN8 pin 15 or CN11 pin 24
• An external 5 V power supply connected to CN11 pin 6
• An external 5 V USB charger (5V_USB_CHGR) connected to CN1
• An external 3.3 V power supply (3V3) connected to CN8 pin 7 or CN11 pin 16
Either the host PC through the USB cable, or an external source V
IN
(7 to 12 V), E5V (5 V),
or +3.3
V power supply pins on CN8 or CN11, provides the power supply. In case V
IN
, E5V,
or +3.3
V is used to power the Nucleo-144 board. This power source must comply with the
EN-60950-1: 2006+A11/2009 standard and must be safety extra low voltage (SELV) with
limited power capability.
In case the power supply is +3.3 V, the STLINK-V3E is not powered and cannot be used.
6.4.1 Power supply input from STLINK-V3E USB connector (default setting)
The 5 V signal on the STLINK-V3E USB connector (CN1) can power the STM32H7 Nucleo-
144 board and its shield. Use the JP2 [1-2] configuration of the STLINK jumper (refer to
Figure 10).
This is the default setting.
-13T_VCP_RX
Target RX used for VCP (must be UART dedicated to
bootloader)
-14T_VCP_TX
Target TX used for VCP (must be UART dedicated to
bootloader)
Table 5. MIPI-10 debug connector (CN5) (continued)
MIPI-10
Pin
STDC14
Pin
CN5 Designation