UCS1002-2 datasheet(39/114 Pages) MICROCHIP

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Programmable USB Port Power Controller with Charger Emulation

Datasheet

SMSC UCS1002

Revision 1.4 (07-16-13)

DATASHEET

Table 5.1 shows the settings for the various power states, except Off and Error. If VDD < VDD_TH, the

UCS1002 is in the Off state. To determine the mode of operation in the Active state, see Table 9.1,

"Active Mode Selection". For more information about configuring the UCS1002 to create single or dual

mode charger solutions, see SMSC application note24.20“Using theUCS100x as a Single or Dual

Mode Charger.”

APPLICATION NOTE: Using configurations not listed in Table 5.1 is not recommended and may produce

undesirable results.

Note 5.1

In order to transition from Active state Data Pass-through mode into Sleep with these

settings, change the M1, M2, and EM_EN pins before changing the PWR_EN pin. See

Section 9.4, "Data Pass-through (No Charger Emulation)".

Note 5.2

If S0=’0’ and a portable device is not attached in DCE Cycle mode, the UCS1002 will be

cycling through charger emulation profiles (by default). There is no guarantee which

charger emulation profile will be applied first when a portable device attaches.

5.1.1

Off State Operation

The device will be in the off state if VDD is less than VDD_TH. When the UCS1002 is in the Off state,

it will do nothing, and all circuitry will be disabled.Digital register values are not stored and the device

will not respond to SMBus commands.

Table 5.1 Power States Control Settings

POWER

STATE

PWR_EN

M1, M2,

EM_EN

PORTABLE

DEVICE

ATTACHED

BEHAVIOR

Sleep

disabled

Not set to

Data

Pass-

through.

See

Note 5.1.

All switches disabled. VBUS will be

near ground potential. The

UCS1002 wakes to respond to

SMBus communications.

enabled

All = 0b

Detect

(see Chapter 8,

Detect State)

disabled

High-speed switch disabled (by

default). Port power switch disabled.

Host-controlled transition to Active

state (see Section 5.1.3.2, "Host-

Controlled Transition from Detect to

Active").

< VS_UVLO

enabled

All <> 0b

> VS_UVLO

enabled

All <> 0b

High-speed switch disabled(by

default). Automatic transition to

Active state when conditions met

(see Section 5.1.3.1, "Automatic

Transition from Detect to Active").

Active

(see Chapter 9,

Active State)

> VS_UVLO

enabled

All <> 0b

High-speed switch enabled /

disabled based on mode. Port power

switch is on at all times. Attach and

Removal Detection disabled. See

Note 5.2.

> VS_UVLO

enabled

All <> 0b

Yes

Port power switch is on. Removal

Detection enabled.

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