TMP92CF30
2009-06-12
92CF30-313
3.14.5 Support for IrDA
SIO0 and SIO1 include support for the IrDA 1.0 infrared data communication
specification.
Figure 3.14.25 shows the block diagram.
Figure 3.14.25 Block Diagram
(1) Modulation of the transmission data
When the transmit data is “0”, the modem outputs 1 to TXD0 pin with either 3/16 or
1/16 times for width of baud-rate. The pulse width is selected by the SIR0CR<PLSEL>.
When the transmit data is “1”, the modem outputs “0”.
Figure 3.14.26 Transmission example
(2) Modulation of the receive data
When the receive data has an effective pulse width of pulse “1”, the modem outputs
“0” to SIO0. Otherwise the modem outputs “1” to SIO0. The effective pulse width is
selected by SIR0CR<SIR0WD3:0>.
Figure 3.14.27 Receiving example
(3) Data format
The data format is fixed as follows:
•
Data length:
8-bit
•
Parity bits:
none
•
Stop bits:
1bit
Transmission
data
SIO0
IR modulator
IR demodulator
Receive
data
IR transmitter & LED
IR receiver
Modem
TXD0
RXD0
IR output
IR input
TMP92CF30
Start
Transmission
data
Stop
0
0
0
0
1
0 1
1
TXD0 pin
Start
Receive data
Stop
1
1
0
0
1 0
1
0
RXD0 pin
Содержание TLCS-900/H1 Series
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