Yes, that’s my plan ultimately, but just want to find some documentation to guide along troubleshoot rather than trial and error to reverse engineer.
Given that the 0V Vdd isuess does not happen consistantly, and currently unsure how to re-produce. Even if the resistor is working after soldered, I have no ways to know this is exactly the solution.
Also 2 reasons led me to ask for background logic:
- Most of the terminal devices with EC25 works flawlessly and non of them has the pull up resistor
- I do have another brand terminal that uses EC25, and its manufacture also decided to skip this pull up as well, it must be for a reason