Solder Bridge Configuration; Table 10. Solder Bridge Configuration And Settings - ST STM32 User Manual

6.12

Solder bridge configuration

Table 10 describes the solder bridge configurations and settings.
Definition
3.3 VLDO output
PF3/VBAT
User button
User LED
SWD signals
MCO
HSE CLK selection
LSE CLK selection
1. The default solder bridge state is shown in bold.
UM3353 - Rev 1
Table 10. Solder bridge configuration and settings
Solder bridge State
ON
SB2
OFF
ON
SB16
OFF
ON
SB15
OFF
ON
SB1
OFF
ON
SB9/SB10
OFF
ON
SB20
OFF
ON (R37/R38 OFF)
SB18/SB19
OFF
ON (R35/R36 OFF)
SB14/SB17
OFF
Hardware layout and configuration
(1) Comment
The U9 LDO output provides 3.3 V.
The U9 LDO output does not provide 3.3 V.
VBAT on STM32 is connected to VDD.
PF3/VBAT is connected to the ST morpho
connector.
The B1 push-button is connected to PC13.
The B1 push-button is not connected to PC13.
PA5 controls LD1.
LD1 is isolated.
PA13/PA14 is connected to the ST morpho
connector.
PA13/PA14 is not connected to the ST morpho
connector.
MCO from STLK provides 8 MHz CLK to MCU.
MCO from STLK floating
PF0/PF1 works as GPIOs.
PF0/PF1 works as HSE pins.
PC14/PC15 works as GPIOs.
PC14/PC15 works as LSE pins.
UM3353
page 18/31