Hi,1. The 5V from main board can not guarantee the working of backlight. the 5V is boosted to around 25V to power the backlight through a boost circuit on the LCD board. So it is better to ensure 5V on C3/C4/C5 or TP5 and around 25V on C1/C2.You may ...
Hi,I think you may reduce the work frequency to check whether such problem is still happened. another method is to change the clock phase to sample read data from PSRAM. B.R.
Hi,You can use the symbol from MB1136 C04 schematic but just modify the symbol to STM32F446RE.Pls check the figure in attachment. You need to remove the signal names under red lines. Be careful Pin47 is VSS. B.R.
Hi,The 3 ground pins are close VCAP, which would be loader of the power from SMPS output. So you may treat this ground panel as ground of output as normal DCDC circuit. B.R.
