I am trying to implement the teletext function ADV739x. However, the operation is that TTxREQ timing is different from the data sheet as in the attachment. Please tell me the correct point.
I am forwarding this to the correct person to answer it
Thank you response.
I will wait for the answer.
I do not have available updates from the 4/16.
I didn't get a response back from the ADV7393 expert yet. I just re-pinged him. Sorry for the delay
I'm not sure if it is possible to adjust the TTX position. However, from looking at the snapshot I think the cursors may have been in the wrong position. You seem to have drawn yellow vertical lines in the correct position: HS falling edge to TTX rising edge. However, the 'scope cursor positions seem to be in white and are in a different position. Could you confirm the scope readings please?
Thank you for your advice.
I will try re-measurement of teletext operation.
By the way,
In"teletext-request mode" of 0xC9 bit 1,
what are the differences between "Line" and" bit"?
Is the setting of 0xCA effective only at the time of "bit request signal"?
Retrieving data ...