Samsung S3C6400X User Manual page 1003

UART
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 31-6 and Figure 31-7).
TxD
UART
Block
RxD
31-8
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
IRS
RE
IrDA Tx
Encoder
Figure 31-4 IrDA Function Block Diagram
Start
Bit
0 1 0 1
Figure 31-5 Serial I/O Frame Timing Diagram (Normal UART)
0
1
0
1
IrDA Rx
Decoder
SIO Frame
Data Bits
0 0 1 1
S3C6400 RISC MICROPROCESSOR
TxD
RxD
Stop
Bit
0 1