Thunderbolt device module and electronic device having root complex and integrating with such thunderbolt device module

A thunderbolt device module, capable of being integrated with an electronic device, the electronic device comprising a target device processor, a first root complex and a first connector, the target device processor being electrically coupled to the first root complex, the first root complex being electrically coupled to the first connector via a first bus, the first bus conforming to a PCIe (peripheral component interface express) interface protocol, said thunderbolt device module comprising:

• a first interface protocol component, conforming to a predetermined interface protocol, wherein the predetermined interface protocol is not the PCIe interface protocol, and supports the PCIe interface protocol, the predetermined interface protocol is one selected from the group consisting of a SAS (serial attached small computer system interface) interface protocol, an Ethernet interface protocol, a SATA (serial advanced technology attachment) interface protocol, and a fibre channel interface protocol;
• a first thunderbolt controller, electrically coupled to the first interface protocol component, a first communication between the first thunderbolt controller and the first interface protocol component conforming to the PCIe interface protocol;
• a first port, electrically coupled to the first thunderbolt controller;
• a second interface protocol component, being electrically coupled to the first interface protocol component and conforming to the predetermined interface protocol, a second communication between the second interface protocol component and the first interface protocol component conforming to the predetermined interface protocol;
• and
• a second connector, electrically coupled to the second interface protocol component and configured to mate with the first connector, wherein a third communication between the second interface protocol component and the target device processor conforms to the PCIe interface protocol through the second connector, the first connector, the first bus, and the first root complex,
• wherein the electronic device is capable of being connected to a host, the host comprises:
• a host processor;
• a second root complex, electrically coupled to the host processor;
• a second thunderbolt controller, electrically coupled to the second root complex via a second bus, the second bus conforming to the PCIe interface protocol;
• and
• a second port, electrically coupled to the second thunderbolt controller, wherein a thunderbolt cable is capable of physically connecting the first port and the second port, the host is capable of communicating with the electronic device through the second thunderbolt controller, the thunderbolt cable, and the first thunderbolt controller.