IRCC SMSC Corporation, IRCC Datasheet - Page 14

• Manufacturer Part Number: IRCC
• Description: INFRARED COMMUNICATIONS CONTROLLER
• Manufacturer: SMSC Corporation

This infrared interface provides a two-way
wireless communications port using infrared as a
transmission
implementations have been provided in this block
of the IrCC, IrDA SIR and Sharp ASK IR.
IrDA SIR allows serial communication at baud
rates up to 115K Baud.
serially beginning with a zero value start bit. A
zero is signaled by sending a single infrared
pulse at the beginning of the serial bit time. A
one is signaled by sending no infrared pulse
during the bit time. Please refer to Figure 7-
Figure 10 for the parameters of these pulses and
the IrDA waveform.
The ASK infrared allows serial communication at
baud rates up to 19.2K Baud. Each word is sent
serially beginning with a zero value start bit. A
zero is signaled by sending a 500KHz waveform
for the duration of the serial bit time.
medium.
Each word is sent
Two
infrared
14
A one is signaled by sending no transmission
during the bit time. Please refer to the AC timing
for the parameters of the ASKIR waveform.
If the Half Duplex option is chosen, there is a
time-out when the direction of the transmission is
changed.
transferred during a transmission and blocks the
receiver input until the time-out expires. If the
transmit buffer is loaded with more data before
the time-out expires, the timer is restarted after
the new byte is transmitted. If data is loaded into
the transmit buffer while a character is being
received, the transmission will not start until the
time-out expires after the last receive bit has
been received.
character is received during this time-out, the
timer is restarted after the new character is
received. The time-out is programmable up to a
maximum of 10ms through the IR Half-Duplex
Time-Out Configuration Register.
This time-out starts at the last bit
If the start bit of another