Figure 310. Irda Sir Endec Block Diagram; Figure 311. Irda Data Modulation (3/16) - Normal Mode - STMicroelectronics STM32WLEx Reference Manual

RM0461 Universal synchronous/asynchronous receiver transmitter (USART/UART)

Figure 310. IrDA SIR ENDEC block diagram

TX
SIREN
USART
RX

Figure 311. IrDA data modulation (3/16) - Normal mode

Start
bit
0 1
TX
IrDA_OUT
IrDA_IN
RX
0
SIR
Transmit
Encoder
SIR
Receive
DEcoder
0 1 0 0
Bit period
1 0 1 0
RM0461 Rev 5
OR
USART_TX
IrDA_OUT
IrDA_IN
USART_RX
Stop
1 1 0
3/16
0 1 1 0
MSv31164V1
bit
1
1
MSv31165V1
1055/1306
1154