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PRELIMINARY
IRDA
S3C6400X RISC MICROPROCESSOR
38-10
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.
Rx
Enable
Str Flag
Detect
Pay Load
Detect
& De-Stuff
ena & flagbyte
0
1
3
str_end
~(ena&flagbyte)
CRC check
& Stp Det
2
pay_end
stp_end
Figure 38-6 MIR demodulation process
Figure 38-6 shows the MIR demodulation state machine. It has similar structure as FIR demodulation
state machine. Instead of 4 PPM demodulation phase, it has the stage of removing stuffed bits from
payload data stream. Since the MIR data stream doesn’t have preamble data, the preamble/start flag
data detection stage in MIR demodulation is simplified to start flag detection state.