Samsung S3C6400X User Manual page 1116

S3C6400X RISC MICROPROCESSOR
Figure 38-5 describes MIR modulation state machine. This machine works very similarly as FIR
modulation state machine. The major difference is that the MIR data transmission needs bit stuffing.
After the every 5 consecutive ones, a zero data should be stuffed in MIR payload data. The state
machine for this bit-stuffing is not presented here.
TX
Enable
ACREG[7]
0
ena
1st Start
Flag
Transmit
1 str_end
Pay Load
Transmit
with stuff bit
2
pay_end
CRC
Transmit
with stuff bit
3
crc_end
Stop
Flag
Transmit
4
stp_end & ena
stp_end & ~ena
Figure 38-5 MIR modulation process.
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
~ena
append
abort by Frame data
underrun with error
crc & eflag
6
2u
sip
Pulse
transmit
5
pul_end & ena
pul_end & ~ena
~abort
IRDA
38-9