ST Nucleo-64 STM32WL3 Series User Manual page 25

7.11 Solder bridge configuration and purpose
MB1801 has 33 solder bridges and MB2029 has 19 solder bridges. They allow an important number of
configurations.
is shown in bold.
7.11.1 MB1801 mezzanine board solder bridges
MB1801 solder bridges allow different configurations of power trees, user LEDs and buttons, and ST-LINK. Some
of the configurations are not relevant for NUCLEO-WL33CCx. MB1801 solder bridges are all located on the
bottom side.
Solder bridge control
AVDD
B1
VCP1_TX
B2
VCP1_RX
B3
VCP2_RX
VCP2_TX
LD1
LD2
LD3
JTDO
JTDI
USB user P
UM3418 - Rev 1
Table 12 describes their purpose for MB1801 and
Table 12. Solder bridges on the mezzanine board
Solder
bridge (SB)
(2)
SB1
SB2
SB3
SB4
SB5
SB6
(2)
SB7
(2) SB8
SB9
SB10
SB11
(2) SB12
(2) SB13
(2) SB14
Table 13 for MB2029. The default configuration
(1)
State
ON The VDDA domain is connected to the VDD domain
OFF The VDDA domain is separated from the VDD domain.
ON The user button B1 is connected to PA0
OFF The user button B1 is disconnected
ON VCP1 of ST-LINK is connected to target MCU
OFF
VCP1 is disconnected from target MCU
ON The user button B2 is connected to PA11.
OFF The user button B2 is disconnected.
ON VCP1 of ST-LINK is connected to target MCU
OFF
VCP1 is disconnected from the target MCU
ON The user button B3 is connected to PB15.
OFF The user button B3 is disconnected.
ON
VCP2 of ST-LINK is connected to target MCU
OFF
VCP2 is disconnected from the target MCU
ON
VCP2 of ST-LINK is connected to target MCU
OFF
VCP2 is disconnected from target MCU
ON The user LED LD1 is connected to PA14.
OFF The user LED LD1 is disconnected.
ON The user LED LD2 is connected to PB4.
OFF The user LED LD2 is disconnected.
ON The user LED LD3 is connected to PB5.
OFF The user LED LD3 is disconnected.
ON JTDO of the target MCU
OFF
JTDO of the target MCU
ON JTDI of the target MCU
OFF
JTDI of the target MCU
USB user (CN9) positive bus is connected to the target
ON
OFF USB user (CN9) positive bus is disconnected
UM3418
Hardware layout and configuration
(1)
Description
(3) TX.
(3)
TX.
(3)
RX.
(3)
RX.
(3)
RX.
(3)
RX.
(3)
TX.
(3)
TX.
(3)
is connected to ST-LINK.
(3)
is disconnected from ST-LINK.
(3)
is connected to ST-LINK
(3)
is disconnected from ST-LINK.
(3)
MCU .
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