Power Supply And Power Selection; External Power Supply Input; Table 7. Power Sources Capability - ST STM32U5 Nucleo-64 User Manual

6.4

Power supply and power selection

6.4.1

External power supply input

It is possible to configure the Nucleo-64 board to use any of the following power sources:
• STLK: 5 V from STLINK-V3EC USB-C
• VIN: 7 to 12V from ARDUINO
• E5V: External 5 V power from ST morpho connector (CN7)
• CHGR: 5 V from STLINK-V3EC USB (CN1) without USB enumeration
• USB_USER: 5 V from user USB Type-C
• 3V3 on ARDUINO
If VIN, E5V, or 3V3 is used to power a Nucleo-64 board, this power source must comply with the standard
EN‑60950‑1: 2006+A11/2009 and must be safety extra‑low voltage (SELV) with limited power capability.
The power supply capabilities are summarized in
Input power name
STLK
VIN / VIN_5V
E5V
CHGR
USB_USER
3V3
VDD
UM3062 - Rev 1
®
connector (CN1)
®
(CN6) or ST morpho connector (CN7), with 5 V adaptation from LDO (U16)
®
connector (CN3)
®
(CN6) or ST morpho connector (CN7).
Table 7. Power sources capability
Connector pins Voltage range
CN1
4.75 to 5.5 V
JP3[1-2]
CN6 pin 8
CN7 pin 24 7 to 12 V
JP3[3-4]
CN7 pin 6
4.75 to 5.5 V
JP3[5-6]
CN1 pin 1
4.75 to 5.5 V
JP3[7-8]
CN3
4.75 to 5.5 V
JP3[9-10]
CN6 pin 4
3.0 to 3.6 V
CN7 pin 16
JP5 pin 2 1.71 to 3.6 V
Table 7.
Max.
current
The maximum current depends on the presence or
absence of USB enumeration:
500 mA
• 100 mA without enumeration
• 500 mA with enumeration OK.
From 7V to 12V only and input current capability is
linked to input voltage:
• 800 mA input current when Vin=7V
800 mA
• 450 mA input current when 7V<Vin<9V
250 mA input current when 9V<Vin<12V
The maximum current depends on the power
1 A source. 1 A maximum is recommended for this
Nucleo-64 board.
The maximum current depends on the used wall
500 mA charger to power the Nucleo-64 board. No USB
enumeration.
The maximum current depends on the USB Host
1 A used to power the Nucleo-64 board. 1 A maximum
is recommended for this Nucleo-64 board.
The maximum current depends on the 3V3 source.
The 3V3 can be used when the STLINK-V3EC part
-
of the PCB is not used. SB8 might be OFF to
protect LDO (U15).
It is possible to power only the MCU power
supplies pins by applying a voltage source on JP5
pin 2. In this case, only the MCU is power. External
-
functions like debug, LED, or expansion connector
are not powered. This option can be used for the
MCU power consumption measurement.
UM3062
Power supply and power selection
Limitation
page 17/45