what is a host controller
1 Host Controller Interface (FireWire) , an interface that enables a FireWire host controller to communicate with a driver. 2  Host Controller Interface (USB) , an interface that enables a USB host controller to communicate with a driver.3  Host Controller Interface (Bluetooth) in Bluetooth protocols. Host Controller Interface (USB) , an interface that enables a USB host controller to communicate with a driver. 2  Host Controller Interface (Bluetooth) in Bluetooth protocols. 3  Host Controller Interface (non-volatile memory) , an interface that enables SATA Express / NVM Express SSDs to communicate with a driver.