ST STM32WL Series User Manual page 24

Solder bridge (SB)
SB15
SB16
(SB16 and SB18 are
exclusive)
SB17
SB18
(SB16 and SB18 are
exclusive)
SB19
(SB19 and SB22 are
exclusive)
SB20
(SB20 and SB23 are
exclusive)
SB21
SB22
(SB19 and SB22 are
exclusive)
SB23
(SB20 and SB23 are
exclusive)
SB24
SB25
SB26
(SB26 and SB28 are
exclusive)
SB27
SB28
(SB26 and SB28 are
exclusive)
SB29
SB30
UM3127 - Rev 1
(1)
Function State
ON
3V3_MEMs
VDD_APP is not connected to 3V3 (MEMS U2, U4, U7, and U14
OFF
ON UART1_TX is connected to pin 3 of the STMod+ connector
STMOD+_UA
RT1_TX
OFF
(PC1)
QVAR2 pin ON
signal of U4
OFF
(barometer)
ON
STMOD+_SPI
1_MISOP
OFF
/
ON
UART1_CTS
(PA6)
OFF
Chip enable ON
(E1) input of
Chip enable (E1) input is not set to 0 (not grounded), so
2
the I C
OFF
EEPROM
U7 ON
(magnetomete
OFF
r) supply
STMOD+_SPI ON SPI1_CLK connected to pin 4 of the STMod+ connector
1_CLK
OFF SPI1_CLK is not connected to pin 4 of the STMod+ connector
(PA5)
Chip enable ON
(E1) input of
Chip enable (E1) input is not set to 1, so should be set to 0
2
the I C
OFF
EEPROM
MAGNETO_INT signal from the STM32WL5MOC module
INT1/DRDY
ON
pin of U7
magnetometer
MAGNETO_INT signal from STM32WL5M module not connected
OFF
(PC6)
2
ON
I C EEPROM
(memory)
OFF
supply
ON
Chip enable
(E2) input of
Chip enable (E2) input is not set to 1, so should be set to 0
OFF
2
I C EEPROM
STMOD+_I2C ON I2C2_SCL connected to pin 7 of the STMod+ connector
2_SCL
OFF I2C2_SCL not connected to pin 7 of the STMod+ connector
(PA12)
ON
Chip enable
(E2) input of
Chip enable (E2) input is not set to 0 (not grounded), so
OFF
2
I C EEPROM
STMOD+_SPI ON SPI1_MOSIS connected to pin 8 of the STMod+ connector
1_MOSIS
OFF SPI1_MOSIS not connected to pin 8 of the STMod+ connector
(PB5)
STMOD+_SPI ON SPI1_MISOS connected to pin 9 of the STMod+ connector
1_MISOIS
OFF SPI1_MISOS not connected to pin 9 of the STMod+ connector
(PB4)
Hardware layout and configuration
Description
3V3_MEMs is connected to 3V3
is not supplied.
UART1_TX is not connected to pin 3 of the STMod+
connector
QVAR1 pin grounded
QVAR1 pin not connected to the ground (floating)
SPI1_MISOP connected to pin 3 of the STMod+
SPI1_MISOP not connected to pin 3 of the STMod+
UART1_CTS connected to pin 4 of the STMod+
UART1_CTS not connected to pin 4 of the STMod+
Chip enable (E1) input set to 0 (grounded)
should be set to 1 (3V3) with SB23
U7 supplied with 3V3_MEMs.
U7 is not supplied.
Chip enable (E1) input set to 1 (3V3)
(grounded) with SB20
connected to the INT1/DRDY pin of U7.
to the INT1/DRDY pin of U7.
2
The I C EEPROM is supplied with 3V3.
2
The I C EEPROM is not supplied.
Chip enable (E2) input set to 1 (3V3)
(grounded) with SB28
Chip enable (E2) input set to 0 (grounded)
should be set to 1 (3V3) with SB23
UM3127
(1)
page 24/47