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The iBook offers a supply voltage of 5 V and up to 500 mA power on the USB 1.1 port, which is not enough for power-hungry devices.
In the low-speed data transfer mode, 1.5Mbit per second are transmitted
In high-speed mode up to 12 Mbit (with shielded cables)
CD / DVD burners can only be operated at low burning speeds via USB.
Pin assignment of the USB port
Pin Signal Description
1VCC +5VDC
2 D Data
3 D+ Data+
4 GND Ground