PT2249AHN(2007) 查看數據表（PDF） - Princeton Technology

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PT2249AHN
(Rev.:2007)

Remote Control Receiver IC

Princeton Technology 

Remote Control Receiver IC

2. Combination of PT2248/PT2250A Series Code Bits

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PT2249A_PT2250A

a) PT2250A Series Code Bit C3 is internally pulled high and thereby set at a default value of “1”. Thus,

PT2248 Code Bit C3 must be set at “1”.

b) PT2250A Series Code Bits C2 and C3 may be programmed as follows:

1) “0”, “0” (This combination is not available with TC9150.)

2) “0”, “1”

3) “1”, “0”

4) “1”, “1”

c) To set Code Bit to “1” on PT2248, diodes must be connected to Code Terminal from the T1 ~ T3

terminals.

d) To set Code Bit to “0” on PT2248, the terminals must be kept floating.

e) The Code Bits Combinations of PT2248 and PT2250A Series are shown below:

PT2248

C1 C2 C3

001

011

101

111

PT2250A Series

C1

C2

0

0

0

1

1

0

1

1

f) Example: (Refer to Example 2 diagram)

The following example shows the case when PT2248 Code Bits C1=0, C2=0, and C3=1. The CODE1

and CODE2 pins of the PT2250A Series are connected to the VSS (C1=0 and C2=0). In this way, the

PT2250A or any of its series matches the C1 and C2 Code Bits of PT2248; thus, the remote commands

are correctly decoded.

Example 2

Circuit Diagram when Code Bit C1=0 and C2=0

PT2249A_PT2250A V2.6

- 15 -

May, 2007

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