Two types of charging port exist: the charging downstream port (CDP), supporting data transfers as well, and the dedicated charging port (DCP), without data support. A portable device can recognize the type of USB port; on a dedicated charging port, the D+ and D− pins are shorted with a resistance not exceeding 200 ohms, while charging downstream ports provide additional detection logic so their presence can be determined by attached devices. (see ref pg. 2, Section 1.4.5, & Table 5-3 "Resistances"—pg. 29).
Two types of charging port exist : the charging downstream port ( CDP ) , supporting data transfers as well , and the dedicated charging port ( DCP ) , without data support . A portable device can recognize the type of USB port ; on a dedicated charging port , the D+ and D− pins are shorted with a resistance not exceeding 200 ohms , while charging downstream ports provide additional detection logic so their presence can be determined by attached devices . ( see ref pg . 2 , Section 1.4.5 , & Table 5 - 3 " Resistances"—pg . 29 ) .
What are the D+ and D- shortened with?
What are the D+ and D- shortened with ?
a resistance not exceeding 200 ohms
a resistance not exceeding 200 ohms