UCS1003-3 datasheet(34/138 Pages) MICROCHIP

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UCS1003-1/2/3

DS20005346B-page 34

 2014-2015 Microchip Technology Inc.

Table 5-2 shows the settings for the various power

states, except for the OFF and Error states. If

VDD <VDD_TH, the UCS1003-1/2/3 devices are in the

OFF state. To determine the mode of operation in the

Active state, see Table 9-1.

Note:

Using

configurations

not

listed

Table 5-2 are not recommended and may

produce undesirable results.

TABLE 5-2:

POWER STATE CONTROL SETTINGS

Power State

PWR_EN

M1, M2,

EM_EN

Portable

Device

Attached

Behavior

Sleep

N/A

Disabled

Not set to Data

Pass-Through

mode (Note 1)

N/A

• All switches disabled

•VBUS will be near ground potential

• The UCS1003-1 wakes to respond

to SMBus communications

N/A

Enabled

All = 0b

N/A

Detect

(see Section 8.0

“Detect State”

)

N/A

Disabled

N/A

• 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

N/A

> 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 Section 9.0

“Active State”

)

> VS_UVLO Enabled

All

 0b

N/A

• High-speed switch enabled/

disabled based on mode

• Port power switch is on at all times

• Attach and Removal Detection

disabled (Note 2)

> VS_UVLO Enabled

All

 0b

Yes

• Port power switch is on

• Removal Detection enabled

Note 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)”

If S0 = 0 and a portable device is not attached in DCE Cycle mode, the UCS1003-1/2/3 devices will be

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

profile will be applied first when a portable device attaches.

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