UCS1002-3 datasheet(50/114 Pages) MICROCHIP

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UCS1002-3

DS20006852A-page 50

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OTHER STATUS REGISTER (ADDRESS 0Fh)

U-x

R-0

—

ALERT_PIN

ADET_PIN

CHG_ACT

EM_ACT

EM_STEP[1:0]

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7-6

Unimplemented

bit 5

ALERT_PIN: Reflects the status of the ALERT# pin. This bit is set and cleared as the ALERT# pin

changes states.

1 = ALERT# pin is asserted low

0 = ALERT# pin is released

bit 4

ADET_PIN: Reflects the status of the A_DET# pin. When set, indicates that the A_DET# pin is asserted

low. This bit is set and cleared as the A_DET# pin changes states. (Note 1)

1 = A_DET# pin is asserted low

0 = A_DET# pin is released

bit 3

CHG_ACT: This bit is automatically set when IBUS > IBUS_CHG and cleared when IBUS < IBUS_CHG.

(Note 2)

1 = IBUS > IBUS_CHG

0 = IBUS < IBUS_CHG

bit 2

EM_ACT: Indicates that the UCS1002-3 is in the Active state and emulating. The actual profile that is

being applied is identified by PRE_EM_SEL[3:0] (see Section 10.12.1 “Applied Charger Emulation

1 = Device is in Active state and emulating

0 = Device is not emulating

bit 1-0

EM_STEP[1:0]: Indicates which stimulus/response pair is currently being applied by the charger

emulation profile as shown below. These bits are set and automatically cleared. Note that the Legacy

charger emulation profiles and the BC1.2 DCP charger emulation profile do not use Stimulus/Response

Pair #3.

00 = None Applied. Waiting for current.

01 = Stimulus/Response #1

10 = Stimulus/Response #2

00 = Stimulus/Response #3 if applicable

Note 1: If S0 is '1', PWR_EN is enabled, and VS is not present, the ADET_PIN bit cycles if the current draw

exceeds the current capacity of the bypass switch.

2: The CHG_ACT bit does not indicate that a portable device has accepted one of the charger emulation

profiles. This bit cycles during the Dedicated Charger Emulation Cycle.

3: The EM_ACT bit does not indicate that a portable device has accepted one of the emulation profiles. This

bit cycles during the Dedicated Charger Emulation Cycle.

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