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PRELIMINARY
IRDA
S3C6400X RISC MICROPROCESSOR
38-6
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.
TX
Enable
Preamble
Transmit
Start
Flag
Transmit
Pay Load
Transmit
& CRC
CRC
Transmit
Stop
Flag
Transmit
~ena
ena
pre_end
str_end
pay_end
crc_end
stp_end & ena
append
Frame data
with error
crc
abort by
underrun
~abort
2u
Pulse
transmit
sip
pul_end & ena
0
1
2
3
4
5
6
7
stp_end & ~ena
pul_end & ~ena
Figure 38-2 FIR modulation process
Figure 38-2 shows the FIR modulation state machine. The FIR transmission mode can be selected by
programming ACR register. If an underrun condition occurs, the state machine appends the payload with
error crc data and terminates the transmission.