Question about the notecard carrier design

Hardware
1

In the NoteCarrier A schematic I see these resistors (highlighted in the screenshot) what are their purpose?

image
image1069×750 117 KB

Sorry if this is obvious, I am just not seeing it.

Thanks,

2

Hey @ril3y,

It’s a simple technique that some designers use for a small bit of ESD protection on external pads that can be easily touched by fingers. If you are designing a circuit where these signals are not feeding external pads, the resistors should be eliminated.

TJ

3

Thanks! Today I learned this.