Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Infrared Remote Control Transmitter
PT2248
PIN DESCRIPTION
Pin Name
VSS
VCC
XT, /XT
K1 ~ K6
T1 ~ T3
/CODE
TEST
TXOUT
Pin No.
1
16
2, 3
4~9
10 ~ 12
13
14
15
I/O
Description
Negative Supply Voltage Terminal
Positive Supply Voltage Terminal
OSC Input/Output
Terminal for OSC, and used for connecting a 455KHz ceramic
resonator, etc.
Key Code Input.
18 Keys can be connected
Key Input Terminals for Key Matrix at T1 ~ T3 x K1 ~ K6
Scan Key Code Output.
(with a built-in pull-down
Digital Timing Output Terminals for
resistor)
Key Matrix
Tx/Rx matching Code Common.
Terminal for matching code between transmitting and receiving.
Transmitter Key Code Testing Function.
Keep this terminal open.
Transmitting Signal Output.
Transmitting signal consists of 12-bit per word and is modulated by
a 38KHz carrier wave.
I, O
I
O
I
I
O
PT2248 V2.7
-3-
June, 2005
PTC [ PRINCETON TECHNOLOGY CORP ]
