The analog ground/system ground GND and the LC boost power ground PGND are directly connected together, and the MCU digital ground DGND is not directly connected together.

QWE4562009

The analog ground/system ground GND and the LC boost power ground PGND are directly connected together, and the MCU digital ground DGND is not directly connected together. [Copy link]

The analog ground/system ground GND and LC boost power ground PGND are connected together. The MCU digital ground DGND is directly connected together, and the impact of not directly connecting together on the serial communication of the serial screen The

analog ground/system ground GND and LC boost power ground PGND are shorted together with a 0 ohm resistor. The MCU digital ground DGND, DGND and GND are connected with magnetic beads at the beginning, that is, the ground is divided and connected to the system ground at a single point. The MCU of the mainboard and the serial screen communicate with each other, and it is found that the screen will be triggered by mistake (the secondary parameter setting interface will pop up after the finger touches the screen instead of the touch coordinate area, which is inexplicable. The setting parameter menu should pop up when touching the right side, but it will pop up when pressing the left side. There is actually no touch interaction on the left side, just a simple countdown display, without interactive function), especially after turning on the LC RF output (2M). Shorting all the grounds together directly without single-point grounding can improve this bug, but it cannot be completely eliminated. What is the reason for this, and from which angles can this problem be solved? THX

okhxyyo

You can read the following article about the application of magnetic beads and 0 ohm resistors.

Do you understand the application of 0 ohm resistors, magnetic beads, and inductors? https://en.eeworld.com/bbs/thread-1130677-1-1.html

秦天qintian0303

Is your touchscreen too sensitive? When one side touches the other side, there is also a small sense of touch.

QWE4562009

Qintianqintian0303 posted on 2024-7-1 10:11 Is your touchscreen too sensitive, and when one side touches, the other side also has a small sense

If you lower the sensitivity, the experience will be very bad