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UART S3C2410A
11-8
Infra-Red (IR) Mode
The S3C2410A UART block supports infra-red (IR) transmission and reception, which can be selected by setting the
Infra-red-mode bit in the UART line control register (ULCONn). Figure 11-4 illustrates how to implement the IR mode.
In IR transmit mode, the transmit pulse comes out at a rate of 3/16, the normal serial transmit rate (when the
transmit data bit is zero); In IR receive mode, the receiver must detect the 3/16 pulsed period to recognize a zero
value (see the frame timing diagrams shown in Figure 11-6 and 11-7).
IrDA Tx
Encoder
0
1
0
1
IrDA Rx
Decoder
TxD
RxD
TxD
IRS
RxD
RE
UART
Block
Figure 11-4. IrDA Function Block Diagram