ST STM32WL55JC Reference Manual page 1204

Universal synchronous/asynchronous receiver transmitter (USART/UART)
Table 246. USART register map and reset values (continued)
Register
Offset
name
USART_TDR
0x28
Reset value
USART_
PRESC
0x2C
Reset value
Refer to
1204/1454
Section 2.6: Memory organization for the register boundary addresses.
RM0453 Rev 2
RM0453
TDR[8:0]
0 0 0 0 0 0 0 0
PRESCALE
R[3:0]
0 0 0
0
0