【通信应用笔记】STOTG04功率下降模式 AN2484 Application note STOTG04 in power down mode Introduction A standard USB bus is based on a host-peripheral topology, where the host is typically a PC which manages the peripherals connected to the bus. The need to interconnect mobile devices is the purpose for the development of the "OTG supplement to the USB 2.0 specification" the main target of which is to add host functionality to devices originally intended as peripherals in USB 2.0. Battery-powered equipment, such as PDAs and mobile……