Well, it works. Remember, these signals are 3.3V and the threshold on the HDMI chip is for a 1.8V rail.
Feel free to try the series resistors if you like. Gerald On Wed, Jan 21, 2015 at 3:58 PM, wojtekskulski via BeagleBoard < [email protected]> wrote: > Gerald: > thank you for the answer. I am a bit surprised that caps on the LCD_DATAx > are helpful. My understanding is that they must slow down the edges because > the AM335x drivers are forced to charge them, what just takes time at a > given AM335x buffer strength, 6 mA in this case (data sheet Table 2-7, > p.26). > > I was thinking that much the same effect can be had by adding series > resistors in front of the LCD inputs of the TDA19988. The slowing down > would be due to charging the TDA19988 pin capacitance through the resistor. > I am curious why it did not work in your design. Perhaps I will give it a > shot.... > > Thank you, > Wojtek > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- Gerald [email protected] http://beagleboard.org/ http://circuitco.com/support/ -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
