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DE10-Standard
User Manual
80
www.terasic.com
January 19, 2017
transmission time is constant.
Figure 5-14 Typical frame of NEC protocol
Note: The signal received by IR Receiver is inverted. For instance, if IR TX Controller sends a lead
code 9 ms high and then 4.5 ms low, IR Receiver will receive a 9 ms low and then 4.5 ms high lead
code.
IR Remote
When a key on the remote control shown in
Figure 5-15
is pressed, the remote control will emit a
standard frame, as shown in
Table 5-5
.
The beginning of the frame is the lead code, which
represents the start bit, followed by the key-related information. The last bit end code represents the
end of the frame. The value of this frame is completely inverted at the receiving end.
Figure 5-15 The remote control used in this demonstration