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PT2268 V2.5

- 3 -

April, 2006

Remote Control Encoder

PT2268

PIN CONFIGURATION

I1

I2

I3

VC C

VS S

OSC1

OSC1

I6

C5

I7

I4

TxOU T

C6

I5

C4

1

16

2

15

3

14

4

13

89

710

6

11

5

12

PT2268

I8

PIN DESCRIPTION

Pin Name

I/O

Description

Pin No.

I1 ~ I8

I

Key Input Pins.

These pins are used to connect a maximum of 8 keys. (Each pin has a

built-in pull-low resistor.)

1 ~ 8

VSS

-

Negative Power Supply

9

C4 ~ C5

I

Select Input Pin for Start Word

These pins have internal pull-low resistors.

12 ~ 11

C6

I

Select Input Pin for Start Word

This pin has an internal pull-high resistor.

10

Tx OUT

O

Transmission Output Pin.

This pin is an open drain (NMOS) output and is used to transmit

signals. The carrier frequency is 38 KHz.

13

OSC1

I

Oscillator No.1 Pin

15

OSC2

O

Oscillator No.2 Pin

These pins are used to externally connect a

455 KHz Ceramic Resonator

14

VCC

-

Positive Power Supply

16