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URL: http://www.princeton.com.tw
Infrared Remote Control Transmitter
PT2248
DATA CODE
Key
No.
1
2
3
4
5
6
7
8
9
H
1
1
1
1
1
1
0
0
0
S1
0
0
0
0
0
0
1
1
1
S2
0
0
0
0
0
0
0
0
0
D1
1
0
0
0
0
0
1
0
0
Data
D2
0
1
0
0
0
0
0
1
0
D3
0
0
1
0
0
0
0
0
1
D4
0
0
0
1
0
0
0
0
0
D5
0
0
0
0
1
0
0
0
0
D6
0
0
0
0
0
1
0
0
0
Output
Form
Continuous
Continuous
Continuous
Continuous
Continuous
Continuous
Single-Shot
Single-Shot
Single-Shot
Key
No.
10
11
12
13
14
15
16
17
18
H
0
0
0
0
0
0
0
0
0
S1
1
1
1
0
0
0
0
0
0
S2
0
0
0
1
1
1
1
1
1
D1
0
0
0
1
0
0
0
0
0
Data
D2
0
0
0
0
1
0
0
0
0
D3
0
0
0
0
0
1
0
0
0
D4
1
0
0
0
00
0
1
0
0
D5
0
1
0
0
0
0
0
1
0
D6
0
0
1
0
0
0
0
0
2
Output
Form
Single-Shot
Single-Shot
Single-Shot
Single-Shot
Single-Shot
Single-Shot
Single-Shot
Single-Shot
Single-Shot
Since multiple keying is possible, Key No. 1 ~ 6 (in combination with D1 ~ D6 data) are capable of
sending out 63 commands. Key No. 7 ~ 18 are single-shot keys capable of sending out 12 commands.
Thus, a total of 75 commands can result from a combination of continuous keys (multiple keying) and
single-shot keys.
CODE BITS (C1, C2 AND C3)
Code bits can be made at one terminal with diodes connected through T1 ~ T3 timing terminals.
Data of C1, C2 and C3 Code Bits become “1” when diodes are connected to CODE Terminal through
the timing signal terminals -- T1 ~ T3, and “0” when diodes are not connected.
CO D E
T3
( C3 )
T2
( C2 )
T1
( C1 )
In the diagram above: C1, C2 and C3 are 1, 1, and 1 data respectively.
PT2248 has three (3) Code Bits. The receiving IC -- PT 2249A Series (DIP 16 Pins) can only use C2
and C3 Code Bits, while PT 2250A Series (DIP 24 Pins) are able to use only C1 and C2 Code Bits.
Therefore, diodes must be connected so that PT2248 Code Bits Data match with that of the receiving
IC.
PT2248 V2.7
-6-
June, 2005
PTC [ PRINCETON TECHNOLOGY CORP ]
