SDP, CDP (BC1.2), DCP (BC1.2)

All these protocols work with USB-A and USB-C ports.

SDP - standard downstream port.

• Defined by the USB 2.0 specification

• Typically found in desktop and laptop computers

• Support USB data transmission

• USB 2.0 provides 0.1A when connected and 0.5A when configured for high power.

• USB 3.0 provides 0.15A when connected and 0.9A when configured for high power.

CDP - charging downstream port (Battery charging (BC)1.2 standard).

• Higher current USB port

• Used for PCs, laptops, and other hardware

• Provides up to 1.5A

• Support USB data transmission

DCP - dedicated charging port (Battery charging (BC)1.2 standard).

• Developed for power sources like USB-chargers

• Provides up to 1.5A

• No support for USB data transmission​