Princeton Technology Corp.
Infrared Remote Control Receiver
Tel: 886-2-29162151
Fax: 886-2-29174598
URL:
http://www.princeton.com.tw
PT2249A / PT2250A Series
e) The Code Bits Combinations of PT2248 and PT2250A Series are shown
below:
C1
0
0
1
1
PT2248
C2
0
1
0
1
C3
1
1
1
1
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.
PT2248
CODE
T3
T2
T1
K6
C1=0 C2=0
PT2250A Series
CODE1 CODE2 OSC
Vcc
+5V
C1=0 C2=0
Example 2
Circuit Diagram when Code Bit C1= 0 and C2 = 0
PT2249A/50A v 2.3
Page 6
Revised Dec. 1999
PTC [ PRINCETON TECHNOLOGY CORP ]
