PORTABLE TERMINAL EQUIPMENT, A POWER SUPPLY SYSTEM, AND A POWER SUPPLY METHOD AND A POWER SUPPLY PROGRAM FOR PORTABLE TERMINAL EQUIPMENT

摘要

A portable terminal equipment capable of operating for a long time is provided. The portable terminal equipment includes: a plurality of circuits separated galvanically and a power supply switching switch which switches power supply to the plurality of circuits between power supply from a USB (Universal Serial Bus) and power supply from a battery for each of respective circuits included in the plurality of circuits.