PT2272-M5 데이터 시트보기 (PDF) - Princeton Technology

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PT2272-M5

PT2272 / 2272-M2S / Remote Control Decoder / Available in DIP and SOP

Princeton Technology 

Remote Control Decoder

Tel: 886-2-66296288

Fax: 886-2-29174598

URL: http://www.princeton.com.tw

PT2272

FUNCTION DESCRIPTION

PT2272 decodes the waveform received and fed into the DIN pin. The Waveform is decoded into code

word that contains the address, data and sync bits. The decoded address bits are compared with the

address set at the address input pins. If both addresses match for 2 consecutive code words, PT2272

drives - (1) the data output pin(s) whose corresponding data bit(s) is then decoded to be a “1” bit, and

(2) the VT output -- to high voltage (high state).

RF OPERATION

CODE BITS

A Code Bit is the basic component of the encoded waveform, and can be classified as either an AD

(Address/Data) Bit or a SYNC (Synchronous) Bit.

Address/Data (AD) Bit Waveform

An AD Bit can be designated as Bit “0”, “1” or “f”, if it is in low, high or floating state respectively. One bit

waveform consists of 2 pulse cycles. Each pulse cycle has 16 oscillating time periods. For further

details, please refer to the diagram below:

OSC

BIT 0

1 bit = 32

4

BIT 1

12

4

BIT f

Floating

where: = Oscillating Clock Period

Bit 1 is only available for Address Bit

PT2272 V3.7

-6-

June, 2008

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