ST STM32L4 5 Series User Manual

DocID024597 Rev 5 1345/1830
RM0351 Universal synchronous asynchronous receiver transmitter (USART)
1411
The USART interrupt events are connected to the same interrupt vector (see Figure 430).
• During transmission: Transmission Complete, Transmission complete before guard
time, Clear to Send, Transmit data Register empty or Framing error (in Smartcard
mode) interrupt.
• During reception: Idle Line detection, Overrun error, Receive data register not empty,
Parity error, LIN break detection, Noise Flag, Framing Error, Character match, etc.
These events generate an interrupt if the corresponding Enable Control Bit is set.
Figure 430. USART interrupt mapping diagram
Parity error PE PEIE
LIN break LBDF LBDIE
Noise Flag, Overrun error and Framing Error in multibuffer
communication.
NF or ORE or FE EIE
Character match CMF CMIE
Receiver timeout RTOF RTOIE
End of Block EOBF EOBIE
Wakeup from Stop mode WUF
(1)
WUFIE
Transmission complete before guard time
(2)
TCBGT TCBGTIE
1. The WUF interrupt is active only in Stop mode.
2. Available on STM32L496xx/4A6xx devices only.
Table 239. USART interrupt requests (continued)
Interrupt event Event flag
Enable Control
bit
06Y9
7&
7&,(
7;(
7;(,(
&76,)
&76,(
,'/(
,'/(,(
5;1(,(
25(
5;1(,(
5;1(
3(
3(,(
/%')
/%',(
&0)
&0,(
(2%)
(2%,(
:8)
:8),(
)(
1)
25(
572)
572,(
(,(
86$57
LQWHUUXSW

ST STM32L4 5 Series Specifications

General

Brand	ST
Model	STM32L4 5 Series
Category	Microcontrollers
Language	English