Solder Bridges; Table 10. Solder Bridge Configuration On Mb1779 - ST STM32WL Series User Manual

6.5

Solder bridges

There are 38 solder bridges on the MB1779 board, and there is one solder bridge on the MB1880 board.
Solder bridge (SB)
SB1
(SB1 and SB3 are exclusive)
SB2
SB3
(SB1 and SB3 are exclusive)
SB4
(SB4 and SB6 are exclusive)
SB5
SB6
(SB4 and SB6 are exclusive)
SB7
SB8
SB9
SB10
SB11
SB12
SB13
SB14
UM3127 - Rev 1
Table 10. Solder bridge configuration on MB1779
(1)
Function State
STMOD+_UA ON UART1_RTS connected to pin 1 of the STMod+ connector
RT1_RTS
OFF UART1_RTS not connected to pin 1 of the STMod+ connector
(PB12)
ACCELERO_GYRO_INT signal from the STM32WL5MOC
INT1 pin of U2
ON
accelerometer/
gyroscope
ACCELERO_GYRO_INT signal from STM32WL5MOC module
OFF
sensor
STMOD+_SPI ON SPI1_NSS connected to pin 1 of the STMod+ connector
1_NSS
OFF SPI1_NSS not connected to pin 1 of the STMod+ connector
(PA4)
STMOD+_UA ON
RT1_RX
OFF UART1_RX not connected to pin 2 of the STMod+ connector
(PC0)
ON
I2C2_SDA
OFF
STMOD+_SPI ON SPI1_MOSIP connected to pin 2 of the STMod+ connector
1_MOSIP
OFF SPI1_MOSIP not connected to pin 2 of the STMod+ connector
(PA7)
ON
I2C2_SDL
OFF
ON
VDD_APP
VDD_APP not connected to 3V3 (DC switches U1 and U5 not
OFF
U4 ON
(barometer)
OFF
supply
ON
OFF T_NRST not connected to pin 12 of the STMod+ connector
pin 12 of the
STMod+
ON PA9 (RESET) connected to pin 12 of the STMod+ connector
connector
OFF
QVAR2 pin ON
signal of U4
OFF
(barometer)
U2 ON
(accelerometer
and
OFF
gyroscope)
supply
The LD39050PU33R (3V3 regulator) output is connected to
LD39050PU33
ON
R (3V3
regulator)
Output of the LD39050PU33R (3V3 regulator) not connected to
OFF
output
Hardware layout and configuration
Description
module connected to the INT1 pin of U2.
not connected to the INT1 pin of U2.
UART1_RX connected to pin 2 of the STMod+ connector
I2C2_SDA connected to MEMs_I2C2_SDA
I2C2_SDA not connected to MEMs_I2C2_SDA
I2C2_SDL connected to MEMs_I2C2_SDL
I2C2_SDL not connected to MEMs_I2C2_SDL
VDD_APP connected to 3V3
supplied.
U4 supplied with 3V3_MEMs.
U4 not supplied.
T_NRST connected to pin 12 of the STMod+ connector
PA9 (RESET) not connected to pin 12 of the STMod+
connector
QVAR2 pin grounded
QVAR2 pin not connected to the ground (floating)
U2 supplied with 3V3_MEMs.
U2 not supplied.
3V3.
3V3.
UM3127
(1)
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