Indicators and Connections

Connections

LEDs

LED Name	Color	Description
Link Status LED	Yellow	On once a host device has enumerated the BrainStem controller
User LED	Blue	Can be manipulated through any of the available APIs
Heartbeat LED	Green	Indicates active BrainStem connection; pulses at a rate determined by the system heartbeat rate
Power/Watchdog LED	Red and flashing blue	Solid red indicates the system is powered. Flashing blue is indication the internal watchdog is running and the USBHub3+ firmware is healthy
Upstream Operational Speed LED	Yellow or green	Upstream enumeration speed to host: green for SuperSpeed; yellow for Hi-Speed or lower USB 2.0 speeds.
Upstream 0 LED	Green	Indicates an active connection on upstream port
Upstream 1 LED	Green
Control Port LED	Yellow
Downstream Operational Speed LED	Yellow or green	Downstream device enumeration speed: green for SuperSpeed; yellow for Hi-Speed or lower USB 2.0 speeds; off when no device is enumerated
Downstream Power LED	Red	LED is on when downstream Vbus is enabled