IRCC2.0 SMSC Corporation, IRCC2.0 Datasheet - Page 60

• Manufacturer Part Number: IRCC2.0
• Description: Infrared Communications Controller
• Manufacturer: SMSC Corporation

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.
IRDA ENCODER
SCE
nActiveFrame becomes
FIGURE 21 - IrDA FIR ENCODER
Framing
Control & Status
60
The IrDA FIR Encoder supports the synchronous
bit-oriented HDLC protocol at 0.576 Mbps and
1.152 Mbps, and 4PPM Encoding at 4 Mbps
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 a SIR Interaction Pulse generator and
Automatic Transceiver Control in hardware.
Generator
Encoder
Encoder
Decoder
Decoder
HDLC
HDLC
4PPM
4PPM
ATC
SIP
Tx
Rx
The IrDA FIR