ST STM32 Nucleo User Manual page 18

Solder bridge
SB2
SB27/SB31/
SB32/SB33
SB30
SB28
SB5/SB6
SB3/SB4
SB7/SB8
SB9/SB10
SB26
SB25
1. Default solder bridge state is shown in bold.
UM2953 - Rev 1
Definition
3.3 V LDO output
UART for VCP
AVDD
AGND
HSE CLK selection
LSE CLK selection
2
ADC/I C
User LED
AVDD
Solder bridge configuration
(1)
State
U6 LDO output provides
ON
3.3 V.
U6 LDO output does not
OFF
provide 3.3 V.
SB27/SB32 ON,
USART2 from PA2/PA3
SB31/SB33 OFF
SB27/SB32 OFF,
USART1 from PB6/PB7
SB31/SB33 ON
VDD provides power to
ON
AVDD.
VDD does not provide power
OFF
to AVDD.
ON AGND is connected to GND.
AGND is not connected to
OFF
GND.
ON (R33/R34 OFF) PF0 and PF1work as GPIOs.
PF0 and PF1work as HSE
OFF
pins.
PC14 and PC15 work as
ON (R31/R32 OFF)
GPIOs.
PC14 and PC15 work as LSE
OFF
pins.
SB8/SB9 ON
CN8 pins 5 and 6 work as
ADC.
SB7/SB10 OFF
SB8/SB9 OFF
CN8 PIN5/6 works as I
SB7/SB10 ON
ON PA5 controls LD4.
OFF LD4 is isolated.
AVDD is connected to CN5
ON
pin 8.
AVDD is disconnected from
OFF
CN5 pin 8.
UM2953
Comment
2
C.
page 18/32