UCS1001 datasheet(47/59 Pages) MICROCHIP

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USB Port Power Controller with Charger Emulation

Datasheet

SMSC UCS1001

Revision 1.2 (05-21-12)

DATASHEET

2. The UCS1001 will apply a possibly different voltage on the DMOUT pin using either a current-

limited voltage source or a voltage divider between VBUS and ground with the center tap on the

DMOUT pin.

3. VBUS voltage is applied.

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.

8.10.4

Legacy 5 Charger Emulation Profile

Legacy 5 charger emulation profile does the following:

1. The UCS1001 will apply 900 mV to both the DPOUT and the DMOUT pins.

2. VBUS voltage is applied.

3. 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

4. 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.

UCS1001 Datasheet(PDF) 47 Page - Microchip Technology