(1) USB chaw nres nkoj fais fab mov
USB hub peripherals powered los ntawm Vbus thiab GND ntawm USB interface ncaj qha. Vim tias qhov tso zis tsawg tam sim no ntawm USB tus tswv chaw nres nkoj, nws tseem ncaj qha txwv cov zis hluav taws xob ntawm qhov chaw nres nkoj hauv qab ntawm USB lub tsheb npav-powered hub. USB2.0 tso zis fais fab mov tam sim no yog hais txog 400mA ~ 500mA. USB3.0 tso zis tam sim no tuaj yeem nyob ib puag ncig 900mA.
(2) USB tus kheej-powered
Thaum USB hub yog tus kheej-powered, nws tuaj yeem muab lub zog rau cov khoom siv hluav taws xob siab. Yog tias USB Vbus thiab GND tsis siv ntawm USB chaw nres nkoj, lub kaw lus tsis tuaj yeem lees paub los ntawm tus tswv tsev.
(3) USB tsheb npav uas siv hluav taws xob tsawg
USB-powered low-powered devices feem ntau yog tib neeg-khoos phis tawj sib cuam tshuam, xws li nas thiab keyboards.
(4) USB bus-powered high-power khoom
Lub tsheb npav USB lub tshuab hluav taws xob siab yuav tsum tau ua tib zoo saib xyuas tias nws cov khoom siv hluav taws xob yuav tsum tsis tuaj yeem dhau ntawm USB fais fab mov, txwv tsis pub nws yuav tsis ua haujlwm ib txwm.
