IRCC SMSC Corporation, IRCC Datasheet - Page 56

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

Transmit
nActiveFrame goes active as soon as the
Consumer IR transmitter starts modulating the
SCE data stream.
inactive as soon as the transmit register is
empty.
Receive
nActiveFrame goes active as soon as the
Consumer IR receiver detects the first active bit-
time of infrared energy. nActiveFrame becomes
inactive whenever the Consumer IR receiver is
manually disabled, a DMA Terminal Count has
occurred, or following a FIFO Overrun.
SCE
nActiveFrame becomes
FIGURE 21 - IrDA FIR ENCODER
Framing
Control & Status
56
Description
The IrDA FIR Encoder supports the synchronous
bit-oriented HDLC protocol at .576Mbps and
1.152Mbps, and 4PPM Encoding at 4Mbps
including all message framing, bit stuffing, and
CRC generation (Figure 21).
Encoder exchanges only payload data with the
host and supports Multi-Frame Windows for brick
walled messages as well as BOF and BW
framing extensions. The IrDA FIR Encoder also
includes an SIR Interaction Pulse generator in
hardware.
Generator
Encoder
Encoder
Decoder
Decoder
HDLC
HDLC
4PPM
4PPM
SIP
Tx
Rx
The IrDA FIR