PT2268 데이터 시트보기 (PDF) - Princeton Technology
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PT2268 Datasheet PDF : 16 Pages
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Remote Control Encoder
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PT2268
TRANSMISSION WAVEFOM
When any of the 8 keys (I1 ~ I8) is set to “High”, the TxOUT outputs one start word followed by 2
identical data words and a space. The code will be continuously outputted until the key is released. If
for any reason, the key was released during the code transmission process, the code that is being
transmitted during the key release action will still be completely outputted. Please refer to the following
diagram.
I1 ~ I8
TxOUT
S t art
Word
1st
Word
2 nd
Word
S pa c e
S t art
Word
1st
Word
2 nd
Word
S pa c e
S t art
Word
1st
Word
2 nd
Word
S pa c e
2 0m s
8 0m s
1 Frame=80ms
Note: OSC=455KHz
TRANSMISSION CODE WAVEFORM
The transmission waveforms of the Start Word and the different Data Words generated when a specific
input key (I1 ~ I8) is pressed are illustrated below (see also Transmission Code Pattern Section).
CLK
START
W1
W2
W3
W4
W5
W6
W7
W8
1
0
X
3X
X=0.625ms
X
PT2268 V2.5
-5-
April, 2006
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