TMP92CZ26A
92CZ26A-340
3.14.5 Support for IrDA
SIO0 includes support for the IrDA 1.0 infr ared data communication specification.
Figure 3.14.8 shows the bl ock diagram.
Figure 3.14.18 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. Th e puls e width is selected by the SIRCR<PLSEL>.
When the transmit data is 1, the modem outputs 0.
Figure 3.14.19 Transmission example
(2) Modulation of the receive data
When the receive data is the effective width of pulse “1”, the modem outputs “0” to
SIO0. Otherwise the m odem outputs “1” to SIO0. The effectiv e pulse width is selected
by SIRCR<SIRWD3 to SIRWD0>.
Figure 3.14.20 Receiving example
Transmisison
data
SIO0
IR modulator
IR demodulator
Receive
data
IR transmitter & LED
IR receiver
Modem
TXD0
RXD0
IR output
IR input
TMP92CZ26A
Start
Transmission
data Stop
0 0 0010 11
TXD0 pin
Start
Receive data Stop
1 1001 010
RXD0 pin