User's Manual
Table Of Contents
- 1 Features
- 2 Ordering information
- 3 Development environment
- 4 Conventions
- 5 Quick start
- 8 NUCLEO-WL55JC board information
- Appendix A STM32WL Nucleo-64 I/O assignment
- Appendix B Federal Communications Commission (FCC) and Innovation, Science and Economic Development Canada (ISED) Compliance Statements
- Appendix C Déclaration de conformité CE simplifiée
- Revision history
- Contents
- List of tables
- List of figures
Solder bridge control
Solder
bridge (SB)
State
(1)
Description
(1)
T_SWO on PB3 SB8
OFF T_SWO not connected to PB3 and isolated from ARD_D3
PB7
USAR
T1 RX
SB9
ON ARD_D0_RX connected to USART1 RX PB7
OFF ARD_D0_RX not connected to USART1 RX PB7
SB10
ON STLINK_RX (T_VCP_RX) connected to USART1 RX PB7
OFF
STLINK_RX (T_VCP_RX) not connected to USART1 RX
PB7
LSE CLK
selection
SB11
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
SB12 / SB13
ON LSE provided by external LSE 32.768kHz CLK X2
OFF LSE not provided by external LSE 32.768kHz CLK X2
SB14
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
B1 User button
SB15
ON User button connected to PC13
OFF User button not connected to PC13
SB16
ON User button connected to PA0
OFF User button not connected to PA0
SP3T VDD supply SB18
ON VDD supplied with FE_CTRL3 (STM32WL IO PC3)
OFF VDD not connected to FE_CTRL3 (STM32WL IO PC3)
BOOT0/PH3 on STmorpho
connector
SB19
ON
BOOT0/PH3 connected to ST Morpho connector CN7 pin
7
OFF
BOOT0/PH3 not connected to ST Morpho connector CN7 pin
7
32 MHz TCXO supply SB20
ON 32 MHz TCXO supplied by PB0-VDD_TCXO (to STM32WL)
OFF
32 MHz TCXO disconnected to PB0-VDD_TCXO (to
STM32WL)
VBAT SB21
ON VBAT (pin A8 of STM32WL) powered by VDD_SYS
OFF
VBAT (pin A8 of STM32WL) supplied separately (through
VBA
T on ST morpho connector CN7 pin 33)
VFBSMPS SB22
ON
VFBSMPS (pin B2 of STM32WL) connected to
VDDRF1V55 (pin F7 of STM32WL)
OFF
VFBSMPS (pin B2 of STM32WL) disconnected from
VDDRF1V55 (pin F7 of STM32WL) for current probing
VDDSMPS SB23
ON
VDDSMPS (pin A2 of STM32WL) connected to VDDRF (pin
E8 of STM32WL)
OFF
VDDSMPS (pin A2 of STM32WL) disconnected from VDDRF
(pin E8 of STM32WL) for current probing
VDDA / VREF+ supply SB24
ON
STM32WL VDDA/VREF+ supplied by VDD_SYS through
SMD ferrite bead L14. Be careful not to provide an
external A
VDD supply if SB26 is ON.
OFF
STM32WL VDDA/VREF+ disconnected from VDD_SYS.
STM32WL VDDA/VREF+ must be externally supplied by
A
VDD.
IOREF and 3V3 connection SB25
ON
IOREF connected to the 3V3 power supply. Be careful to
remove SB29 to avoid voltage supply conflict with VDD_MCU.
UM2592
Solder bridges
UM2592 - Rev 2
page 30/50