Communication buses

CS

Chip Select

SPI line that tells a specific chip "I'm talking to you now."

How it looks

Real geometry: CORE3588 copper, drawn from our board file (top and bottom layers; this net in amber)

CS on CORE3588 (amber): net IMU_CS_N.

1The motion sensor U11 at this end...
2...to the computer module socket. This one wire is CS: "you are selected" (active when low).

CS is one wire of an SPI bus; the others are SCK, MOSI, MISO, INT.