Samsung S5PC100 User Manual page 683

IRDA
Figure 8.4-2 shows the FIR modulation state machine. The FIR transmission mode is selected by programming
ACR register. If an underrun condition occurs, the state machine appends the payload with error CRC data and
terminates the transmission.
8.4-4
TX
Enable ~ena
0
ena
Preamble
Transmit
1
pre_end
Start
Flag
Transmit
2
str_end
Pay Load
abort by
Transmit
underrun
& CRC
3
pay_end
CRC
Transmit
4
crc_end
Stop
sip
Flag
Transmit
5
stp_end & ena
stp_end & ~ena
Figure 8.4-2 FIR Modulation Process
S5PC100 USER'S MANUAL (REV1.0)
apeend
Frame data ~abort
with error
crc
6
2u
Pulse
transmit
7
pul_end & ena
pul_end & ~ena