Toshiba H1 Series - Manual (Page 343)

TMP92CZ26A
92CZ26A-340
3.14.5 Support for IrDA
SIO0 includes support for the IrDA 1.0 infrared data communication specification.
Figure 3.14.8 shows the block 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. The pulse 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 modem outputs “1” to SIO0. The effective 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 0 0 1 0 1 1
TXD0 pin
Start Receive data
Stop 1 1 0 0 1 0 1 0
RXD0 pin