Feature
SB7, SB9: ON
SB6, SB10, SB2, SB4: OFF
USART1 (PB6/PB7) connected to Arduino™ (D1 & D0) and
ST morpho connector (CN10 pin 35 and 37).
1. The default configuration is shown in bold
Table 12.
LPUART1 connection
Feature
SB3, SB5: ON
SB2, SB4, SB6, SB10: OFF
LPUART1 (PA2/PA3) connected to STLINK-V3E Virtual
COM port.
SB2, SB4: ON
SB3, SB5, SB7, SB9: OFF
LPUART1 (PA2/PA3) connected to ARDUINO
®
(D1 & D0) and
ST morpho connector (CN10 pin 35 and 37).
1. The default configuration is shown in bold
By default:
•
Communication between the target STM32WL and the STLINK-V3E MCU is enabled on LPUART1 to
support the Virtual COM port.
•
Communication between the target STM32WL and ARDUINO
®
(and ST morpho) connectors is enabled on
USART1.
6.7
Solder bridges
All the 31 solder bridges are located on the STM32WL Nucleo-64 board.
All the solder bridges present on the STM32WL Nucleo-64 board are used to configure several I/Os and power
supply pins for compatibility of features and pinout with the target STM32WL supported.
Table 13.
Solder bridge configuration
Solder bridge control
Solder
bridge (SB)
State
Description
3.3 V LDO
output
SB1
ON
U2 LDO output provides 3.3 V
OFF
U2 LDO output does NOT provide 3.3V,
the user has to connect an external 3.3 V source.
PA2
LPUART1 TX
SB2
ON
ARD_D1_TX connected to LPUART1 TX PA2
OFF
ARD_D1_TX not connected to LPUART1 TX PA2
SB3
ON
STLINK_TX (T_VCP_TX) connected to LPUART1 TX PA2
OFF
STLINK_TX (T_VCP_TX) not connected to LPUART1 TX PA2
PA3
LPUART1 RX
SB4
ON
ARD_D0_RX connected to LPUART1 RX PA3
OFF
ARD_D0_RX not connected to LPUART1 RX PA3
SB5
ON
STLINK_RX (T_VCP_RX) connected to LPUART1 RX PA3
OFF
STLINK_RX (T_VCP_RX) not connected to LPUART1 RX
PA3
PB6
USART1 TX
SB6
ON
STLINK_TX (T_VCP_TX) connected to USART1 TX PB6
OFF
STLINK_TX (T_VCP_TX) not connected to USART1 TX
PB6
UM2592
Solder bridges
UM2592
-
Rev 1
page 29/49
