ST STM32WL55JC Reference Manual page 1168

Universal synchronous/asynchronous receiver transmitter (USART/UART)
35.7 USART interrupts
Refer to
Interrupt
Interrupt event
vector
Transmit data register empty
Transmit FIFO not Full
Transmit FIFO Empty
Transmit FIFO threshold
USART
reached
or UART
CTS interrupt
Transmission Complete
Transmission Complete Before
Guard Time
Receive data register not
empty (data ready to be read)
Receive FIFO Not Empty
Receive FIFO Full
Receive FIFO threshold
reached
Overrun error detected
Idle line detected
Parity error
USART
LIN break
or UART
Noise error in multibuffer
communication
Overrun error in multibuffer
communication
Framing Error in multibuffer
communication
Character match
Receiver timeout
End of Block
Wakeup from low-power mode
SPI slave underrun error
1. The USART can wake up the device from Stop mode only if the peripheral instance supports the Wakeup from Stop mode
feature. Refer to Section 35.4: USART implementation
1168/1454
Table 245 for a detailed description of all USART interrupt requests.
Table 245. USART interrupt requests
Event
flag
TXE
TXFNF
TXFE
TXFT
CTSIF
TC
TCBGT
RXNE
RXFNE
(2)
RXFF
RXFT
ORE
IDLE
PE
LBDF
NE
(3)
ORE
FE
CMF
RTOF
EOBF
WUF
UDR
Enable Interrupt clear
Control bit method
TXEIE Write TDR
TXFNFIE TXFIFO full
Write TDR or write 1 in
TXFEIE
TXFRQ
TXFTIE Write TDR
CTSIE Write 1 in CTSCF
Write TDR or write 1 in
TCIE
TCCF
Write TDR or write 1 in
TCBGTIE
TCBGT
Read RDR or write 1
RXNEIE
in RXFRQ
Read RDR until
RXFNEIE RXFIFO empty or
write 1 in RXFRQ
RXFFIE Read RDR
RXFTIE Read RDR
RXNEIE/
Write 1 in ORECF
RXFNEIE
IDLEIE Write 1 in IDLECF
PEIE Write 1 in PECF
LBDIE Write 1 in LBDCF
Write 1 in NFCF
EIE Write 1 in ORECF
Write 1 in FECF
CMIE Write 1 in CMCF
RTOFIE Write 1 in RTOCCF
EOBIE Write 1 in EOBCF
WUFIE Write 1 in WUC
EIE Write 1 in UDRCF
for the list of supported Stop modes.
RM0453 Rev 2
RM0453
Exit from Exit from Exit from
(1)
Sleep Stop Standby
mode modes mode
NO
NO
YES
YES
YES
NO
NO
NO
YES
YES
YES
YES
NO
NO
NO
YES
NO
NO
NO
NO
NO
NO
NO
YES
NO
NO
NO