Princeton Technology Corp.
Infrared Remote Control Receiver
Tel: 886-2-29162151
Fax: 886-2-29174598
URL:
http://www.princeton.com.tw
PT2249A / PT2250A Series
C3 = 0. ) In this way, the PT2249A Series can match the C2, C3 Code Bits
of PT2248 and correctly decode the remote commands.
PT2248
CODE
T3
T2
T1
K6
C3=0
PT2249A Series
CODE3 CODE2 OSC
Vcc
C2=1
C2=1
C3=0
C1=1
Example 1
Circuit Diagram when Code Bit C2 = 1 and C3 = 0
2. Combination of PT2248/PT2250A Series Code Bits
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)
2)
3)
4)
“0”, “0” (This combination is not available with TC9150.)
“0”, “1”
“1”, “0”
“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.
PT2249A/50A v 2.3
Page 5
Revised Dec. 1999
PTC [ PRINCETON TECHNOLOGY CORP ]
