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How to use ADV7393 to do subtitles display

Question asked by on May 8, 2017
Latest reply on Jun 6, 2017 by Anthony_Purcell

What I want to ask is how do you do the ADV7393 chip subtitles display? Which used the TTX data signal and TTXREQ request signal, data sheet which describes the TTX request signal output through the SFL pin, you can give me a detailed description of how to use subtitles display? Or tell me how to use this request signal, the request signal in the end which is the output from the pin, timing diagram? The SFL pin can be used as a subcarrier frequency latch, and can also be used as a teletext request signal, the document details the subcarrier frequency lock