UCS1002-3 datasheet(53/114 Pages) MICROCHIP

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DS20006852A-page 53

UCS1002-3

10.3.1

PROFILE STATUS 1 REGISTER

These bits are indicators only and do 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

• a Removal Detection event occurs.

PROFILE STATUS 1 REGISTER (ADDRESS 12h)

R-0

U-x

R-0

NO_HS

—

VS_LOW

CUST

DCP

CDP

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

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. (Note 1)

1 = No handshake at the end of the DCE Cycle.

0 = A new charger emulation profile is applied

bit 6-5

Unimplemented

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 automatically cleared when the VS voltage is above the VS_UVLO threshold.

1 =VS < VS_UVLO

0 =VS > VS_UVLO

bit 3

CUST: Indicates that the portable device successfully performed a handshake with the user-defined

Custom Charger Emulation Profile during the DCE Cycle and is charging. Based on the Custom Charger

Emulation Profile configuration, the high-speed switch may either be open or closed (see Section 10.13

“Custom Emulation Configuration Registers”). The port power switch current limiting mode is

determined by the Custom current limiting behavior settings (see Section 10.14.2 “Custom Current

Limiting Behavior Configuration Register”).

1 = Custom Profile handshake complete

0 = No Custom Profile handshake

bit 2

DCP: Indicates that the portable device accepted the BC1.2 DCP charger emulation profile and is

charging. The high-speed switch is controlled via the HSW_DCE bit (see Section 10.4.5 “High-Speed

Switch Configuration Register”), and the port power switch uses Constant Current Limiting.

1 = DCP handshake complete

0 = No DCP handshake

bit 1

CDP: Indicates that the portable device successfully performed a handshake with the BC1.2 CDP

charger emulation profile and is charging. The high-speed switch is closed, and the port power switch

uses Trip Current Limiting.

1 = CDP handshake complete

0 = No CDP handshake

bit 0

PT: Indicates that the UCS1002-3 is in the Data Pass-Through or BC1.2 SDP Active mode. The

high-speed switch is closed, and the port power switch uses Trip Current Limiting. (Note 2)

1 = UCS1002-3 is in the Data Pass-Through or BC1.2 SDP Active mode.

0 = UCS1002-3 is not in the Data Pass-Through or BC1.2 SDP Active mode.

Note 1:

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 emu-

lation profile if a portable device does not handshake with it. This bit is not set at the same time that any

other Profile Status register bits are set.

2: When the UCS1002-3 is configured as a Data Pass-Through and a Removal event and then an Attach

event occur without changing the Active mode, the PT bit is not set again even though the UCS1002-3 is

still operating as a Data Pass-Through as configured. Toggling the M1 control re-enables the PT status bit.

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