UCS2112 datasheet(47/64 Pages) MICROCHIP

47 / 64 page

 2015 Microchip Technology Inc.

DS20005424B-page 47

UCS2112

GENERAL CONFIGURATION 3 REGISTER (ADDRESS 13H)

R/W-0

R/W-1

R-0

R/W-0

U-0

PIN_IGN

ATT_DIS

DIS_TO

PWR_STATE<1:0>

BOOST

—

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit

C = Clear on Read

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7

PIN_IGN:

Ignores the PWR_EN1 and PWR_EN2 pin states when determining the power state. This bit

is retained in Sleep.

= PWR_EN1 and PWR_EN2 pin states are ignored.

= Power state is determined by the OR'd combination of the PWR_EN1 and PWR_EN2 pins states

and the corresponding PWR_EN1S and PWR_EN2S bit states.

bit 6

ATT_DIS:

Attach Detect Disable - Disables the Attach and Removal Detection feature and affects the

power state (see Table 5-2). Setting this bit to 1 forces Active state provided the PWR_EN 1/2 control is

enabled.

= Attach/Removal Detection disabled.

= Attach/Removal Detection enabled.

bit 5

DIS_TO:

Disable Time Out - Disables the SMBus time out feature.

= Time out disabled

= Time out enabled

bit 4-3

PWR_STATE<1:0>:

Current Power State - These bits indicate the current Power State. See Note 1

=SLEEP

=DETECT

=ACTIVE

=ERROR

bit 2

BOOST:

Indicates that the IBUS current is higher than IBOOST on VBUS1 or VBUS2 (bit is OR’ed).

= IBUS has exceeded IBOOST on either or both ports

= IBUS is less than IBOOST on either port individually

bit 1-0

Unimplemented

Note

Accessing the SMBus/I2C™ causes the UCS2112 to leave the Sleep state. As a result, the PWR_STATE<1:0> bits will

never read as 00b.

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