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Universal Serial Bus
The Universal Serial Bus (USB) port connects USB devices to the computer. These
devices can include printers, keyboards and other peripherals that have historically used serial,
parallel, mouse, and keyboard I/O buses. USB devices, designed to be fully Plug-and-Play
(PnP), feature hot attach/detach and daisy-chain capabilities. The USB port can transfer data
at a maximum theoretical rate of 12 megabits per second.
Pin
Signal
Pin
Signal
A1
PWR
B1
PWR
A2
-
B2
-
A3
+
B3
+
A4
GROUND
B4
GROUND
A
B
1
4
1
4