msp430FG437 drives LCD display with afterimage

ena

msp430FG437 drives LCD display with afterimage [Copy link]

The specific situation is as follows: a 4-way composite is used, and the bias voltage is in the form of external resistor voltage division. However, after powering on, I used an oscilloscope to measure the voltage at several voltage division points. The waveform is not a step-shaped square waveform, but a spike pulse waveform, as shown in the figure. Moreover, the various pins of the LCD output also have this waveform, resulting in residual images when displaying. What is the reason for this?

ena

These are two graphs. The first one is the output of COM terminal, and the second one is the voltage of V2.

ena

These are two graphs. The first one is the output of COM terminal, and the second one is the voltage of V2.

qwerghf

Check the hardware configuration. If the configuration is correct, you can add a capacitor to the output port.