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PT2248 V2.7

- 5 -

June, 2005

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.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

T1

T2

T3

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 C 3 H

S1 S2 D 1 D 2 D 3 D 4 D 5 D 6

C o de Bits

C o ntinuo us

Sing le -Sho t

Co de

Ke y In pu t C o d e