In the attachment "Grey arrow boxes.jpg" I have circled in red three grey pointer boxes labeled BCKL, VLED+, and VLED-. What does this grey arrow box indicate?
If I search the entire schematic for these words, they show up in a variety of places. As an example BCKL shows up in:
- Capacitive_Display.SchDoc
- Power Supply.SchDoc
- LED driver
I don't see anything that ties the backlight to the MCU, so I don't know how to turn it on and adjust the brightness. I suspect I'm not properly understanding the schematic nomenclature, so I thought I'd ask these clarifying questions.