StarTech.com ST4300U3C3 - Manual (Page 7)

Instruction Manual
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Apple Mode definition:
Apple Mode is a proprietary charging mode developed by Apple, which redefines
the other two pins of the USB connector, enabling them to send current and increase
charging speed (same theory as DCP mode in BC 1.2 version, but with different voltage
levels on the pins).
Detailed as follows:
1A Mode: VCC:5V/GND:5V/D+:2.0V/D-:2.7V (compatible with Apple products that need
1A current input, such as iPhones, IPods and iPads)
2A Mode: VCC:5V/GND:5V/D+:2.7V/D-:2.0V (compatible with Apple products that need
2A current input, such as iPads or iPad minis)
Notes:
a. The choice of charging mode is dependent upon what mode the connected device
supports. The quantity of charging electricity provided is also dependent upon how
much the connected device needs to get a full speed charge.
b. Some devices with a 2A charging requirement can be charged in a 1A USB port,
however, the provided power will be 1A and the charging time will be longer.
Likewise, devices with a 1A charging requirement can be connected to a 2A USB
port and the connected device will only draw the power that is required. It is
recommended that you connect your devices to the proper USB ports based on the
charging requirement of the connected device(s).
c. The charging station may become warm to the touch during charging – this is
normal and will not harm your connected device(s).
d. With an exhausted battery, a Samsung Galaxy Note tablet will not display a charging
icon when connected to the charging hub. After approximately one hour of low
speed charging, the charging icon will show up and begin high speed charging.
BC 1.2 Mode ( Battery Charging Specification 1.2) definitions:
SDP: Standard Downstream Port, defined under USB 2.0 & 3.0 specification. Charging
limits: 500mA / USB 2.0; 900mA/USB3.0
DCP: Dedicated charging Port, for charging only. To increase charging efficiency in
DCP mode, D+ and D- will short out and cannot transmit data. **ST7CU35122 uses this
mode only.
CDP: Charging Downstream Ports. USB ports under this mode can transmit data.