User's Manual
Table Of Contents
- 1 Features
- 2 Ordering information
- 3 Development environment
- 4 Conventions
- 5 Quick start
- 8 NUCLEO-WL55JC board information
- Appendix A STM32WL Nucleo-64 I/O assignment
- Appendix B Federal Communications Commission (FCC) and Innovation, Science and Economic Development Canada (ISED) Compliance Statements
- Appendix C Déclaration de conformité CE simplifiée
- Revision history
- Contents
- List of tables
- List of figures
Power supply input from STLINK-V3E USB connector (default setting)
The STM32WL Nucleo-64 board and shield can be powered from STLINK-V3E connector CN1 (5 V) by setting
5V_SEL jumper JP4 [1‑2] on STLK, as illustrated in Figure 11. This is the default setting.
Figure 11. Power supply input from STLINK-V3E USB connector with PC (5 V, 500 mA maximum)
If the USB enumeration succeeds, the 5V_USB_STLK power is enabled, by asserting the T_PWR_EN signal from
U9 STLINK-V3 STM32F723IEK6. This pin is connected to the U5 STMPS2151STR power switch, which powers
the board. The U5 STMPS2151STR power switch features also a current limitation to protect the PC in case of a
short-circuit on board. If an overcurrent higher than 500 mA occurs on board, the LED4 red LED is lit.
The Nucleo board and its shield can be powered from ST-LINK USB connector CN1, but only the ST-LINK circuit
gets power before USB enumeration because the host PC only provides 100 mA to the board at that time.
During the USB enumeration, the Nucleo board requires 500 mA power from the host PC.
• If the host can provide the required power, the enumeration finishes by a SetConfiguration command
and then, the power switch STMPS2151STR is switched ON, the 5V_PWR LED5 green LED is turned ON,
thus the Nucleo board and its shield on it can consume 500 mA at the maximum.
UM2592
Power supply
UM2592 - Rev 2
page 17/50