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PT2272 Datasheet(PDF) 6 Page - Princeton Technology Corp |
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PT2272 Datasheet(HTML) 6 Page - Princeton Technology Corp |
6 / 22 page Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT2272 V3.7 - 6 - June, 2008 Remote Control Decoder 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: 1 bit = 32 4 12 4 where: = Oscillating Clock Period Bit 1 is only available for Address Bit OSC BIT 0 BIT 1 BIT f Floating |
Similar Part No. - PT2272_08 |
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Similar Description - PT2272_08 |
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