UCS1001 datasheet(59/59 Pages) MICROCHIP

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USB Port Power Controller with Charger Emulation

Datasheet

SMSC UCS1001

Revision 1.2 (05-21-12)

DATASHEET

Revision 1.1

(11-21-11)

cont.

Section 8.4, "Data Pass-

through (No Charger

Emulation)"



Data Pass-through persists until M1, M2, or EM_EN controls

are changed. It is no longer affected by PWR_EN. Added

application note: When the M1, M2, and EM_EN controls are

set to ‘0’, ‘1’, ‘0’ or to ‘1’, ‘1’, ‘0’ respectively, Data Pass-

through mode will persist if the PWR_EN control is disabled;

however, the UCS1001 will draw more current. To leave Data

Pass-through mode, the PWR_EN control must be enabled

before the M1, M2, and EM_EN controls are changed to the

desired mode.

Section 8.6, "BC1.2 CDP"



BC1.2 CDP mode uses constant current limiting. Added

application note: BC1.2 compliance testing may require the

S0 control to be set to ‘0’ (Attach and Removal Detection

feature disabled) while testing is in progress.



Added application note: When the UCSX100X is in BC1.2

CDP mode and the Attach and Removal Detection feature is

enabled, if a power thief, such as a USB light or fan, attaches

but does not assert DP, a Removal event will not occur when

the portable device is removed. However, if a standard USB

device is subsequently attached, Removal Detection will

again be fully functional. As well, if PWR_EN is cycled or M1,

M2, and / or EM_EN change state, a Removal event will

occur and Attach Detection will be reactivated.

Section 8.7, "BC1.2 DCP"



Added application note: BC1.2 compliance testing may

require the S0 control to be set to ‘0’ (Attach and Removal

Detection feature disabled) while testing is in progress.

Table 8.2, "Current Limit

Mode Options"



BC1.2 CDP charger emulation changed from using “trip” to

“CC mode if ILIM < 1.5 A, otherwise, trip mode”.

Section 8.10.4, "Legacy 5

Charger Emulation Profile"



Added. The Legacy 5 charger emulation profile no longer

applies a voltage divider. It applies 900 mV to DPOUT and

DMOUT.

Revision 1.0

(08-18-11)

Initial Release

Table 11.1 Customer Revision History (continued)

REVISION

LEVEL & DATE

SECTION/FIGURE/ENTRY

CORRECTION

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