ST STM32L5 Nucleo-144 board User Manual

6.15 Solder bridge configuration
Table 16 details the solder bridges of the STM32L5 Nucleo-144 board.
Table 16. SB configuration
Definition Bridge
Setting
(1)(2)
Comment
ST-LINK USB Power
bypass mode
SB1
OFF USB power switch protection enable
ON USB power switch by-passed (not recommended)
3V3_PER SB2
OFF 3V3 for peripheral not available (not recommended)
ON
Used to provide 3V3 to some peripheral without impacting the
IDD measurement
3V3 LDO output SB3
OFF
U7 LDO output does not provide 3V3. An external 3V3 is needed.
LDO protection is active when external 3V3 is used
ON U7 LDO output provides 3V3
MCU VDDSMPS SB4
OFF VDDSMPS input not supplied (not recommended)
ON VDDSMPS input connected to VDD_MCU
MCU_VREFP
SB5
OFF VREFP input not supplied (not recommended)
ON VREFP input connected to VDDA
SB115
OFF
VREFP not connected to Zio, ARDUINO
®
pin 6
ON
VREFP connected to Zio, ARDUINO
®
pin 6
HSE CLK selection
SB6/SB7
OFF/OFF HSE NOT provided by External HSE CLK X3
ON/ON HSE provided by External HSE CLK X3
SB143
OFF ST-LINK MCO NOT used for HSE CLK
ON ST-LINK MCO used for HSE CLK
SB142
OFF PH0 NOT connected to morpho connector MCO usage
ON PH0 connected to morpho connector
SB145
OFF PH1 NOT connected to morpho connector
ON PH1 connected to morpho connector I/O usage
USB
SB8
OFF
PC2 not connected to USB Type-C
™
VBUS_SENSE used as
ADC_A7 on Zio connector
ON
PC2 connected to USB Type-C
™
VBUS_SENSE
SB144
OFF
PC2 not connected to ADC_A7 on Zio connector used as USB
Type-C
™
VBUS_SENSE
ON PC2 connected to ADC_A7 on Zio connector
SB10
OFF
PA15 connected to STM USB Type-C
™
port protection and
used as CC1
ON
USB Type-C
™
port protection is bypassed (not recommended
debug only)
SB11
OFF
PB15 connected to STM USB Type-C
™
port protection and
used as CC2
ON
USB Type-C
™
port protection is bypassed (not recommended
debug only)
SB137/SB138
OFF/OFF PA11/PA12 used as USB_FS_P/N interface
ON/ON PA11/PA12 used as I/O connected to morpho connector CN12
UM2581
Solder bridge configuration
UM2581 - Rev 2
page 30/48

ST STM32L5 Nucleo-144 board Specifications

General

Brand	ST
Model	STM32L5 Nucleo-144 board
Category	Motherboard
Language	English