UCS1002-2 datasheet(92/114 Pages) MICROCHIP

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Programmable USB Port Power Controller with Charger Emulation

Datasheet

Revision 1.4 (07-16-13)

SMSC UCS1002

DATASHEET

APPLICATION NOTE: The Legacy charger emulation profiles and the BC1.2 DCP charger emulation profile do not

use the Stimulus 3 Configuration registers (39h - 3Bh). Whenever these charger emulation

profiles are applied, registers 39h - 3Bh will not be updated and their contents should be

ignored.

10.12.3

Preloaded Emulation Stimulus X - Config 1 - 31h, 35h, 39h

The contents of this register are not retained during Sleep. They are updated as needed.

APPLICATION NOTE: The Legacy charger emulation profiles do not use these settings. Whenever a Legacy

charger emulation profile is applied within the DCE Cycle, these controls will not be updated

and should be ignored. These settings are only used by the BC1.2 CDP and BC1.2 DCP

charger emulation profiles.

Bit 6 - SX_TD_TYPE - Determines the behavior of the stimulus timer.



‘0’ - The stimulus timer is a delay from when the stimulus is detected until the response is

performed.



‘1’ - The stimulus timer controls how long the response is applied after the stimulus is detected.

The response is applied immediately and held for the duration of the timer then removed (if the

stimulus has been removed).

Bits 5 - 3 - SX_TD[2:0] - Determines the stimulus X tSTIM_DEL value as shown in Table 10.27.

Bits 2 - 0 - STIMX[2:0] - Determines the stimulus that is used as shown in Table 10.28.

Table 10.27 Stimulus Delay Time Options

SX_TD[2:0] SETTING

TIME DELAY

210

000

0 ms

001

1 ms

010

5 ms

011

10 ms

100

20 ms

101

40 ms

110

80 ms

111

100 ms

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