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Infrared Remote Control Transmitter
PT2248
KEY MATRIX
KEY NO. 1~ 6
These are continuous keys. Multiple Keying is possible.
KEY NO. 7 ~ 18
These are single-shot keys. When an input is made, there is only one signal output.
T1
1
2
3
4
5
6
T2
7
8
9
10
11
12
T3
13
14
15
16
17
18
K1
K2
K3
K4
K5
K6
(H)
(S1)
(S2)
TRANSMISSION COMMAND
The Transmission Command consists of one Command Word. One Command Word is composed of
Code Bits (3-bit), Continuous Code (1-bit), Single-Shot Code (2-bit) and the Key Input Code (6-bit).
Thus, one Command Word has 12-bit. C1 ~ C3 are code bits that are adaptable to many models. “H”
indicates the continuous signal code while “S1” and “S2” are single-shot signal codes. D1 ~ D6 are key
input data codes in 6 bits.
C1 C2 C3
C o d e B it s
H
S1 S2
D1 D2 D3 D4 D5 D6
K e y I n pu t C o d e
C o n t inu o u s
S in g le -S h o t
C o de
PT2248 V2.7
-5-
June, 2005
PTC [ PRINCETON TECHNOLOGY CORP ]
