Originally Posted by
morfius
35 мА?!?
Драйвер за зареждане?
Хайде стига сме писали без идея за материята.
На кратко казано, 500 мА при ЮСБ 2.0 и 900 мА при ЮСБ 3.0 можеш да ползваш.
Драйвера му трябва за комуникация, дори изключени устройства ако се пъхнат в ЮСБ порт се зареждат (когато порта на устройството служи и за комуникация и за зареждане разбира се).
А ЮСБ е стандарт, не може на едно масата да е на едно място, на друго другаде... освен ако някой китаец не се е оплескал.
A unit load is defined as 100 mA in USB 2.0, and 150 mA in USB 3.0. A device may draw a maximum of 5 unit loads (500 mA) from a port in USB 2.0; 6 (900 mA) in USB 3.0. There are two types of devices: low-power and high-power. A low-power device draws at most 1 unit load, with minimum operating voltage of 4.4 V in USB 2.0, and 4 V in USB 3.0. A high-power device draws the maximum number of unit loads permitted by the standard. Every device functions initially as low-power but the device may request high-power and will get it if the power is available on the providing bus.
Some devices, such as high-speed external disk drives, require more than 500 mA of current and therefore cannot be powered from one USB 2.0 port. Such devices usually come with Y-shaped cable that has two USB connectors to be plugged into a computer. With such a cable, a device can draw power from two USB ports simultaneously.
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