Table 12. Solder bridge configuration
Solder bridge control
Solder
bridge (SB)
State
(1)
Description
(1)
100 nF on
PG10-NRST
SB1
ON
100 nF capacitor grounded to PG10-NRST of the
STM32G4
OFF
100 nF capacitor disconnected from PG10-NRST of the
STM32G4
PB8 on ARD_D14 SB2
ON
PB8 connected to Arduino
™
D14
OFF
PB8 not connected to Arduino
™
D14
PC5 on ST morpho SB3
ON PC5 connected to ST morpho CN10 pin 6
OFF PC5 not connected to ST morpho CN10 pin 6
PB8 on Morpho SB4
ON PB8 connected to ST morpho CN7 pin 7
OFF PB8 not connected to ST morpho CN7 pin 7
3.3 V LDO
output
SB5
ON U12 LDO output provides 3.3 V
OFF
U12 LDO output does NOT provide 3.3 V, user must connect
an external 3.3 V source.
User LED LD2 SB6
ON User LED driven by PA5 (ARD_D13)
OFF User LED not driven
PA15 on Morpho SB7
ON PA15 connected to ST morpho CN7 pin 17
OFF PA15 not connected to ST morpho CN7 pin 17
SMD ferrite bead L1 SB8
ON
SMD ferrite bead L1 shunted. VDDA connected on VDD
voltage supply
OFF SMD ferrite bead L1 on STM32G4 VDDA voltage supply
JTDI on MIPI10 SB9
ON JTDI connected to MIPI10 connector (CN4 pin 10)
OFF JTDI not connected to MIPI10 connector (CN4 pin 10)
SMD ferrite bead L2 SB10
ON
SMD ferrite bead L2 shunted. VREF+ connected to either
VREF or VDD depending on the jumper position on JP8
OFF
SMD ferrite bead L2 on VREF+ (either VREF or VDD
voltage supply (depending on the jumper position on
JP8)).
AGND SB11
ON AGND connected to GND. Reserved, do not modify.
OFF AGND not connected to GND.
PC4
USART1 TX
SB12
ON STLINK_TX (T_VCP_TX) connected to USART1 TX PC4
OFF
STLINK_TX (T_VCP_TX) not connected to USART1 TX
PC4
SB13
ON ARD_D1_TX connected to USART1 TX PC4
OFF ARD_D1_TX not connected to USART1 TX PC4
VREF voltage
(3.25 V or 2.5 V)
SB14
ON
R33 = 10 kΩ is shunted. Then VREF = 2.5 V. Do not forget to
remove in that case R34 = 33 kΩ.
OFF
R33 = 10 kΩ is not shunted. Then VREF = 3.25 V. In that
case, R34 = 33 kΩ must be fitted.
T_SWO on PB3 SB15
ON T_SWO connected to PB3.
OFF T_SWO not connected to PB3 and isolated from ARD_D3.
UM2505
Solder bridges
UM2505 - Rev 2
page 25/43
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