6.4.6
VDD_MCU IDD measurement
The labeled
IDD
JP5 jumper can measure the consumption of the STM32 microcontroller replacing the jumper by
an ammeter or a 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
IDD
jumper can perform the current measurement for both 3V3 and 1V8 MCU voltage range.
6.5
LEDs
LD1 green user LED
The LD1 green user LED 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 1V8 or 3V3 voltage range is.
LD2 blue user LED
The LD2 blue user LED is connected to PB7. A transistor is used to drive the LED whatever the MCU 1V8 or 3V3
voltage range is.
LD3 red user LED
The LD3 red user LED is connected to PG2. A transistor is used to drive the LED whatever the MCU 1V8 or 3V3
voltage range is.
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.
LD4 tricolor COM LED
The LD4 tricolor LED (green, orange, and red) provides information about STLINK-V3E communication status.
The LD4 default color is red. LD4 turns green to indicate that the communication is in progress between the PC
and the STLINK-V3E, with the following setup:
•
Red LED ON: when the initialization between the PC and STLINK-V3E is complete
•
Green LED ON: after a successful target communication initialization
•
Blinking red/green: during communication with the target
•
Orange ON: communication failure
LD5 green PWR LED
The LD5 green LED indicates that the STM32 part is powered by a 5 V source, and this source is available on
CN8 pin 9 and CN11 pin 18.
LD6 red STLINK-V3E USB OC power switch fault LED
The LD6 red LED indicates that the board power consumption on 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.
LD7 USB Type-C
®
green LED
The LD7 green LED shows the presence of the 5V_USB_C. Refer to
details.
UM2861
LEDs
UM2861
-
Rev 2
page 25/49
