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•
Place the JP8 jumper on [2-3] to supply the MCU VREF+ with VDD
6.6.4
Current consumption measurement (IDD)
Jumper JP6, labeled IDD, is used to measure the STM32G4 microcontroller consumption by removing the jumper
and by connecting an ammeter:
•
JP6 ON: STM32 is powered with 3V3 voltage (default)
•
JP6 OFF: an ammeter must be connected to measure the STM32G4 current. If there is no ammeter, the
STM32 is not powered.
To get a correct and complete current consumption of the STM32G4, jumper JP8 must be set to [2-3] to supply
the MCU VREF+ with VDD, otherwise, the current consumption at pin VREF+ is not taken into account in the IDD
(through jumper JP6).
6.6.5
Virtual COM port (VCP): LPUART and USART
The STM32G4 Nucleo-64 board offers the possibility to connect an LPUART or a USART interface to the
STLINK-V3E, Arduino
™
Uno V3 connector (CN9 pins 2 and 1), or ST morpho connector (CN10 pins 35 and 37).
The selection is done by setting the related solder bridges as detailed in
.
Table 10.
USART1 connection
Feature
SB13, SB19: ON
SB12, SB20, SB18, SB22: OFF
USART1 (PC4/PC5) connected to Arduino
™
(D1 & D0) and
ST morpho connector (CN10 pin 35 & 37).
SB12, SB20: ON
SB13, SB19, SB17, SB23: OFF
USART1 (PC4/PC5) connected to STLINK-V3E Virtual COM
port.
1. The default configuration is shown in bold
Table 11.
LPUART1 connection
Feature
SB17, SB23: ON
SB18, SB22, SB12, SB20: OFF
LPUART1 (PA2/PA3) connected to STLINK-V3E Virtual
COM port.
SB18, SB22: ON
SB17, SB23, SB13, SB19: OFF
LPUART1 (PA2/PA3) connected to Arduino
™
(D1 & D0) and
ST morpho connector (CN10 pin 35 & 37).
1. The default configuration is shown in bold
By default:
•
Communication between the target STM32G4 and the STLINK-V3E MCU is enabled on LPUART1 to
support the Virtual COM port
•
Communication between the target STM32G4 and Arduino
™
(and ST morpho) connectors is enabled on
USART1
6.7
Solder bridges
All 41 solder bridges are located on the bottom layer of the STM32G4 Nucleo-64 board.
UM2505
Solder bridges
UM2505
-
Rev 2
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