Logic input voltage VI1 -0.5 ～ VDD + 0.5 V
Did you measure the 3.3V pin on your Arduino ?
Mcufriend pcb design is criminal.
no problem with 3.3v current/voltage ! works good with shields!
no im not copy the mcufriends shields, i need to show a test for my customer on large size lcdand have enough money to buy new module , im just need one sample with 4" and then they buys shields and send it for completing projects
there is no R13 on this 4" / 3.5" shields (i havnt this lcds at this time)
what is buffer ics do in the shileds? they convert 16-bit to 8-bit?
i think if shields havent buffer, we can only use in 16-bit mode? is it true?
I don't believe you. If you have 74HC245 you will see 3.8V - 4.2V when you use a 5V Uno or Mega