15.10 Irda Communications - Renesas RZ/A Series User Manual

RZ/A1L Group, RZ/A1LU Group, RZ/A1LC Group

15.10 IrDA Communications

In combination with the on-chip IrDA module, the channel 0 serial communications interface (SCI) transmits and
receives waveforms conforming with version 1.0 of the Infrared Data Association (IrDA) standard.
When the IrDA function is enabled by the IRE bit in the IRCR register, the SCI_TXD0 and SCI_RXD0 signals
transmitted and received on channel 0 are encoded to and decoded from waveforms conforming with the standard.
Connecting these signals to an infrared transceiver enables infrared transmission and reception conforming with the
standard.
The standard allows starting communications at a transfer rate of 9600 bps and changing the rate as required. The IrDA
module does not have the function of automatically changing the transfer rate. To change the transfer rate of IrDA
communications, change the transfer rate of the SCI.
Figure 15.40 shows the block diagram. Table 15.18 shows the pin configuration of the IrDA.
SCI_TXD0
SCI_RXD0
Figure 15.40 Block Diagram
Table 15.18 Pin Configuration
Name
IrDA transmit data pin
IrDA receive data pin
R01UH0437EJ0600 Rev.6.00
Jan 29, 2021
IRE = 0
Phase inversion
IRE = 1
Phase inversion
IRCR
Pin Name I/O
SCI_TXD0 O
SCI_RXD0 I
Pulse encoder
Pulse decoder
Internal data bus
Description
IrDA transmit data output
IrDA receive data input
15. Serial Communications Interface
IrDA SCI ch0
TXD
IRE = 1
RXD
IRE = 0
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