USB Circuit Design.Expansion of the USB is done by using a USB port hub. In a typical design,if a device is using less than 500mA/5V supply,it is usually better to tap the power from the computer. The type of data transfer between the computer and the devices are interrupt (e.g. mouse),bulk (e.g. printer) or isochronous (e.g. speakers). USB Circuit Design - Electronics Project Design Is this answer helpful?Thanks!Give more feedbackThanks!How can it be improved?How can the answer be improved?Tell us how USB Circuit Design - Electronics Project Design USB Circuit Design. USB is an acronym for Universal Serial Bus and is the technology that enables the connections between computer and external devices over a cable using bi serial transmission. It has 4 connections to it i.e. Vcc, Gnd, Data + and Data -. The devices can be connected to the computer without turning OFF the personal computer.[PDF] USB Hardware Design Guide - Silicon Labs This application note gives recommendations on hardware design for implementing USB host and device applications using USB capable EFM32 microcontrollers. Some EFM32 microcontrollers, for instance selected members of the Giant Gecko and Leopard Gecko families, offer on-chip USB support.