Good afternoon! I’m redesigning the BeagleBone Black Wireless for a project I’m working on. I’m a bit confused about the difference between the GND signal and the CGND signal. I’m assuming CGND means chassis ground, but I’m not entirely sure how they differ. Would it pose a major problem if I routed them as the same signal? Any help is appreciated. Thanks!

You are right it is chassis ground.

The first answer off Google isn’t bad as to why have one.


Chassis grounding is an important part of the ground separation strategy to reduce ground noise. It provides a dedicated return path for the ground current to earth ground. Chassis grounding not only helps in protecting the PCB from surges and ground noise, but it may also act as a shield against EMI.

Alright. Good to know. I’ll go ahead and design the planes as such then. Thanks!