UCS1001-3 datasheet(48/57 Pages) MICROCHIP

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USB Port Power Controller with Charger Emulation

Datasheet

Revision 1.4 (07-16-13)

SMSC UCS1001

DATASHEET

4. If the portable device is charging, the UCS1001 will accept that the currently applied profile is the

correct charger emulation profile for the attached portable device. The voltages applied to the

DPOUT and DMOUT pins will remain in place. The UCS1001 will begin operating in trip mode

5. If the portable device is not charging, the UCS1001 will stop the currently applied charger emulation

profile. This will cause all voltages put onto the DPOUT and DMOUT pins to be removed. Emulation

reset occurs, and the UCS1001 will initiate the next charger emulation profile.

8.10.3

Legacy 3 Charger Emulation Profile

The Legacy 3 charger emulation profile does the following:

1. The UCS1001 will connect a resistor (RDCP_RES) between DPOUT and DMOUT.

2. VBUS is applied.

3. If the portable device is charging, the UCS1001 will accept that this is the correct charger emulation

profile for the attached portable device. The resistive short between the DPOUT and DMOUT pins

will be left in place.

4. If the portable device is not charging, the UCS1001 will stop the Legacy 3 charger emulation. This

will cause resistive short between the DPOUT and DMOUT pins to be removed. Emulation reset

occurs, and the UCS1001 will initiate the next charger emulation profile.

8.10.4

Legacy 6 Charger Emulation Profile

The Legacy 6 charger emulation profile does the following:

1. The UCS1001 will apply a voltage on the DPOUT pin using a voltage divider between VBUS and

ground with the center tap on the DPOUT pin.

2. VBUS voltage is applied.

3. If the portable device is charging, the UCS1001 will accept that Legacy 6 is the correct charger

emulation profile for the attached portable device. The voltage applied to the DPOUT pin will

remain in place. The UCS1001 will begin operating in trip mode

4. If the portable device is not charging, the UCS1001 will stop the Legacy 6 charger emulation profile.

This will cause the voltage put onto the DPOUT pin to be removed. Emulation reset occurs, and

the UCS1001 will initiate the next charger emulation profile.

UCS1001-3 датащи(PDF) 48 Page - Microchip Technology