Samsung S5PC110 Manual page 810

S5PC110_UM
1.3.8.1 Infra-Red (IR) Mode
The S5PC110 UART block supports both infra-red (IR) transmission and reception. It is selected by setting the
Infra-red-mode bit in the UART line control register (ULCONn).
mode.
In IR transmit mode, the transmit pulse comes out at the rate of 3/16, that is, normal serial transmit rate (if the
transmit data bit is 0). In IR receive mode, however, the receiver must detect the 3/16 pulsed period to recognize a
0 value (Refer to the frame timing diagrams shown in
T xD
IR S
U A R T
B lo ck
R x D
R E
IrD A T x
E n co d e r
Figure 1-4
Start
Bit
0 1 0 1
Figure 1-5 Serial I/O Frame Timing Diagram (Normal UART)
1 UNIVERSAL ASYNCHRONOUS RECEIVER AND TRANSMITTER
Figure 1-4
and
Figure 1-5 Figure
0
1
0
1
IrD A R x
D e co d e r
IrDA Function Block Diagram
SIO Frame
Data Bits
0 0 1 1
illustrates how to implement the IR
1-7).
Stop
Bit
0 1
T x D
R xD
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