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Solder bridge control
Solder
bridge (SB)
State
Description
LSE CLK
selection
SB31
&
SB30
ON
LSE provided by external LSE 32.768 kHz CLK X2.
OFF
LSE not provided by external LSE 32.768 kHz CLK X2.
SB32
ON
PC14-OSC32_IN connected to ST morpho connector I/O
usage (CN7 pin 25).
OFF
PC14-OSC32_IN not connected to ST morpho connector.
SB29
ON
PC15-OSC32_OUT connected to ST morpho connector I/O
usage (CN7 pin 27).
OFF
PC15-OSC32_OUT not connected to ST morpho
connector.
PB9 on ARD_A4
SB34
ON
PB9 connected to ARD_A4 and connected to CN7 pin 36.
OFF
PB9 not connected to ARD_A4 and connected to CN7 pin
36.
PC1 on ARD_A4
SB35
ON
PC1 connected to ARD_A4 and connected to CN7 pin 36.
OFF
PC1 not connected to ARD_A4 and connected to CN7 pin 36.
PC0 on ARD_A5
SB36
ON
PC0 connected to ARD_A5 and connected to CN7 pin 38.
OFF
PC0 not connected to ARD_A5 and connected to CN7 pin 38.
PA15 on ARD_A5
SB37
ON
PA15 connected to ARD_A5 and connected to CN7 pin 38.
OFF
PA15 not connected to ARD_A5 and connected to CN7
pin 38.
IOREF and 3V3 connection
SB39
ON
IOREF connected to 3V3 power supply.
OFF
IOREF not connected to 3V3 power supply.
T_SWDIO
on PA13
SB40
ON
T_SWDIO connected to PA13.
OFF
T_SWO not connected to PA13.
T_SWCLK
on PA14
SB41
ON
T_SWCLK connected to PA14.
OFF
T_SWCLK not connected to PA14.
1. The default SB state is in bold.
All the other solder bridges present on the STM32G4 Nucleo-64 board are used to configure several I/Os and
power-supply pins for compatibility of features and pinout with the target STM32G4 supported.
UM2505
Solder bridges
UM2505
-
Rev 2
page 27/43