ST STM32L4+ Series Reference Manual page 1808

Low-power universal asynchronous receiver transmitter (LPUART)
USART modes/features
Hardware flow control for modem
Continuous communication using DMA
Multiprocessor communication
Synchronous mode (Master/Slave)
Smartcard mode
Single-wire Half-duplex communication
IrDA SIR ENDEC block
LIN mode
Dual clock domain and wakeup from low-power mode
Receiver timeout interrupt
Modbus communication
Auto baud rate detection
Driver Enable
USART data length
Tx/Rx FIFO
Tx/Rx FIFO size
1. X = supported.
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Table 358. USART/LPUART features
(1)
RM0432 Rev 6
USART1/2/3 UART4/5
X
X
X
X
X
X
X
X
X
X
X
X
X
7, 8 and 9 bits
X
RM0432
LPUART1
X X
X X
X X
- -
- -
X X
X -
X -
X X
X -
X -
X -
X X
X X
8