Hi Archana Ravindran,
P0.27 and P0.28 is the true open-drain pin.
So, please add external pullup up in these two pins, then try again.
Wish it helps you!
If you still have question about it, please let me know!
Have a great day,
Kerry
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------
Thanks Kerry Zhou.Afterwards I had pulled up both the pins to 5v.The LCD commands are received correctly.But now also the problem persists.
Hi Archana Ravindran,
What the problems you are meeting now?
Check the pin waveform with the oscilloscope, whether the wave in these two pin is correct?
If the pin wave is correct, you need to check your software code which communicate with your LCD, it should meet the LCD command demand.
Have a great day,
Kerry
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------