UCS1002-2 datasheet(75/114 Pages) MICROCHIP

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Programmable USB Port Power Controller with Charger Emulation

Datasheet

SMSC UCS1002

Revision 1.4 (07-16-13)

DATASHEET

Bit 2 - OVER_VOLT - Indicates that the VS voltage has exceeded the VS_OV threshold and the device

has entered the Error state. This bit will be cleared when read if the error condition has been removed

or if the ERR bit is cleared. This bit will cause the ALERT# pin to be asserted and the device to enter

the Error state.

Bit 1 - BACK_VOLT - Indicates that the VBUS voltage has exceeded the VS or VDD voltages by more

than 150 mV. This bit will be cleared when read if the error condition has been removed or if the ERR

bit is cleared. This bit will cause the ALERT# pin to be asserted and the device to enter the Error state.

Bit 0 - OVER_ILIM - Indicates that the IBUS current has exceeded both the ILIM threshold and the

IBUS_R2MIN threshold settings. This bit will be cleared when read if the error condition has been

removed or if the ERR bit is cleared. This bit will cause the ALERT# pin to be asserted and the device

to enter the Error state.

10.3.3

General Status - 11h

Bit 7 - RATION - Indicates that the UCS1002 has delivered the programmed amount of power to a

portable device. If the RATION_BEH bits are set to interrupt the host, this bit will cause the ALERT#

pin to be asserted. This bit is cleared when read. This bit is also cleared automatically when the

RATION_RST bit is set or the RATION_EN bit is cleared (see Section 10.4.1, "General Configuration

- 15h").

Bit 4 - CC_MODE - Indicates that the IBUS current has exceeded ILIM.

Bit 3 - TREG - Indicates that the internal temperature has exceeded TREG and that the current limit

has been reduced. This bit is cleared when read and will not cause the ALERT# pin to be asserted

unless the ALERT_LINK bit is set.

Bit 2 - LOW_CUR - Indicates that a portable device has reduced its charge current to below ~6.4 mA

and may be finished charging. This bit is cleared when read and will not cause the ALERT# pin to be

asserted unless the ALERT_LINK bit is set.

Bit 1 - REM - Indicates that a Removal Detection event has occurred and there is no longer a portable

device present. This bit is cleared when read and will not cause the ALERT# pin to be asserted. It will

cause the A_DET# pin to be released.

Bit 0 - ATT - Indicates that an Attach Detection event has occurred and there is a new portable device

present. This bit is cleared when read and will not cause the ALERT# pin to be asserted. It will cause

the A_DET# pin to be asserted.

10.3.4

Profile Status 1 - 12h

These bits are indicators only and will not cause the ALERT# pin or A_DET# pin to change states.

The CUST, DCP, CDP, and PT bits are cleared under the following circumstances: the PWR_EN

control is disabled, a new Active mode is selected, or a Removal Detection event occurs.

Bit 7 - NO_HS - The NO_HS bit is only set during the Dedicated Charger Emulation Cycle (see Section

9.10, "No Handshake"). This bit is automatically cleared whenever a new charger emulation profile is

applied.

APPLICATION NOTE: The NO_HS bit does not indicate that a portable device is drawing current and it may be

cleared to ‘0’ (indicating a handshake) and a portable device not charge. This bit is set at

the end of each charger emulation profile if a portable device does not handshake with it.

This bit will not be set at the same time that any other Profile Status register bits are set.

Bit 4 - VS_LOW - Indicates that the VS voltage is below the VS_UVLO threshold and the port power

switch is held off. This bit is cleared automatically when the VS voltage is above the VS_UVLO threshold.

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