Vdd_Mcu Idd Measurement; Leds - ST STM32U5 User Manual

6.4.6 VDD_MCU I
DD
The labeled I
DD
jumper and by connecting an ammeter or any other current measurement tool.
• Jumper ON: STM32 Microcontroller is powered (default).
• Jumper OFF: an ammeter or an external 3V3 power source must be connected to power and measure the
STM32 microcontroller consumption.
The I jumper performs the current measurement for both 3V3 and 1V8 MCU voltage ranges.
DD
6.5

LEDs

User green LED (LD1)
The user green LED (LD1) is connected to the PC7 STM32 I/O (SB21 ON and SB23 OFF, default configuration)
or PA5 (SB21 OFF and SB23 ON, optional configuration corresponding to the D13 ST Zio connector). A transistor
is used to drive the LED whatever the MCU 1.8/3.3 V voltage range.
User blue LED (LD2)
The user blue LED (LD2) is connected to PB7. A transistor is used to drive the LED whatever the MCU 1.8/3.3 V
voltage range.
User red LED (LD3)
The user red LED (LD3) is connected to PG2. A transistor is used to drive the LED whatever the MCU 1.8/3.3 V
voltage range.
These user LEDs are ON when the I/O is in the HIGH state, and are OFF when the I/O is in the LOW state.
COM tricolor LED (LD4)
The tricolor (green, orange, and red) LED (LD4) provides information about STLINK-V3E communication status.
For details information about this LED refer to the technical note Overview of ST-LINK derivatives (TN1235)
Green PWR LED (LD5)
The green LED (LD5) indicates that the Nucleo-144 is powered by a 5 V source, and this source is available on
CN8 pin 9 and CN11 pin 18, but also for the LDO and external SMPS input.
Red STLINK-V3E USB OC power switch fault LED (LD6)
The red LED (LD6) indicates that the board power consumption on the USB exceeds 500 mA.
• If 500 mA or more is expected, the board must be supplied by one of the external 5 V sources compatible
with more than 500 mA capability.
• If more than 500 mA is not expected, the board must be analyzed to understand the extra consumption.
®
USB Type-C
The green LED (LD7) is driven by the presence of the 5 V on the USB Type-C
®
USB Type-C
UM2861 - Rev 5
measurement
jumper (JP5) is used to measure the consumption of the STM32 microcontroller by removing the
green LED (LD7)
FS/HS for more details.
UM2861
®
user connector. refer to
page 24/49
LEDs