Samsung S5PC110, Manual

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S5PC110_UM 1 UNIVERSAL ASYNCHRONOUS RECEIVER AND TRANSMITTER
1-8
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).
Figure 1-4
illustrates how to implement the IR
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
Figure 1-5
and
Figure 1-7
).
IrD A T x
E n co d e r
0
1
0
1
IrD A R x
D e co d e r
T xD
R xD
T xD
IR S
R xD
R E
U A R T
B lock
Figure 1-4 IrDA Function Block Diagram
Start
Bit
Stop
Bit
Data Bits
SIO Frame
0 1 0 1 0 0 1 1 0 1
Figure 1-5 Serial I/O Frame Timing Diagram (Normal UART)