Patent ID: 8864527

Claim:
A universal serial bus (USB) memory device comprising: at least one five pin USB connector; a memory to write data received from the five pin USB connector or reading out stored data to transmit the data to the five pin USB connector; and a controller electrically connected to the five pin USB connector and the memory to control data transmission between the five pin USB connector and the memory, wherein the five pin USB connector comprises a power terminal, a ground terminal, a D+ terminal, a D− terminal, and an ID terminal, and the ID terminal is connected to the ground terminal so that the five pin USB connector is grounded; wherein the power terminal of the five pin USB connector is electrically connected to a power control terminal of the controller, the D+ terminal of the five pin USB connector is electrically connected to a D− control terminal of the controller, the D− terminal of the five pin USB connector is electrically connected to a D+ control terminal of the controller, and the ground terminal and the ID terminal of the five pin USB connector are electrically connected to a ground control terminal of the controller, respectively; at least one four pin USB connector including a second power terminal, a second ground terminal, a second D+ terminal, and a second D− terminal, wherein the four pin USB connector is electrically connected to the controller so that data transmission from the memory is controlled by the controller.