UCS1003-1 datasheet(69/138 Pages) MICROCHIP

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 2014-2015 Microchip Technology Inc.

DS20005346B-page 69

UCS1003-1/2/3

10.3.1

PROFILE STATUS 1 REGISTER

These bits are indicators only and will 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-0

R-0

NO_HS(1)

—

VS_LOW

CUST

DCP

CDP

PT(2)

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:

No Handshake Status bit(1)

The NO_HS bit is only set during the Dedicated Charger Emulation Cycle mode (see Section 9.10 “No

Handshake (UCS1003-1 only)”

). This bit is automatically cleared whenever a new charger emulation

profile is applied.

= No handshake at the end of the DCE Cycle

= A new charger emulation profile has been applied

bit 6-5

Unimplemented:

Read as ‘0’

bit 4

VS_LOW:

VS_UVLO Voltage Threshold Status bit

Indicates that the VS voltage is below the VS_UVLO threshold and the port power switch is held off. This

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

= VS < VS_UVLO

= VS > VS_UVLO

bit 3

CUST:

Custom Charger Emulation Profile Status bit

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 will 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 Configuration register settings (see Section 10.14.2 “Custom

Current-Limiting Behavior Configuration Register”

= Custom profile handshake completed

= No custom profile handshake

bit 2

DCP:

DCP Charger Emulation Profile Status bit

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

The high-speed switch will be controlled via the HSW_DCE bit (see Section 10.4.5 “High-Speed

Switch Configuration Register”

) and the port power switch will use Constant-Current Limiting.

= DCP handshake completed

= No DCP handshake

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 will not be set at the same time that

any other Profile Status register bits are set.

When the UCS1003-1 is configured as a data pass-through and a removal event and then an Attach event

occurs without changing the Active mode, the PT bit will not be set again, even though the UCS1003-1 is still

operating as a data pass-through as configured. Toggling the M1 control will re-enable the PT status bit.

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