PT2249AH Princeton Technology Corp, PT2249AH Datasheet - Page 4

• Manufacturer Part Number: PT2249AH
• Description: Infrared Remote Control Receiver
• Manufacturer: Princeton Technology Corp

Infrared Remote Control Receiver
Application Note:
1. Combination of PT2248/PT2249A Series Code Bits
PT2249A/50A v 2.3
a) PT2249A Series Code Bit C1 is internally pulled high and thereby set
at a default value of “1”. Thus, PT2248 Code Bit C1 must be set at “1”.
b) PT2249A Series Code Bits C2 and C3 may be programmed as follows:
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,
except C1 - add one diode.
e) The Code Bits Combinations of PT2248 and PT2249A Series are shown
below:
f) Example : (Refer to Example 1 diagram)
The following example shows the case when PT2248 Code Bits C1 = 1,
C2 = 1, and C3 = 0. The CODE2 Pin of the PT2249A Series is
programmed in floating state and CODE3 pin is connected to Vss (C2 = 1,
1) “0”, “0” (This combination is not available with TC9149.)
2) “0”, “1”
3) “1”, “0”
4) “1”, “1”
C1
1
1
1
1
Princeton Technology Corp.
PT2248
C2
0
0
1
1
C3
0
1
0
1
PT2249A Series
Page 4
C2
0
0
1
1
PT2249A / PT2250A Series
C3
0
1
0
1
URL: http://www.princeton.com.tw
Revised Dec. 1999
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