UCS1003-1 datasheet(68/138 Pages) MICROCHIP

68 / 138 page

UCS1003-1/2/3

DS20005346B-page 68

 2014-2015 Microchip Technology Inc.

GENERAL STATUS REGISTER (ADDRESS 11h)

R-0

U-0

R-0

R/C-0

RATION

—

CC_MODE

TREG

LOW_CUR

REM

ATT

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit

C = Clear on Read bit

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7

RATION:

Programmed Power Amount Delivery Status bit

Indicates that the UCS1003-1 has delivered the programmed amount of power to a portable device. If

the RATION_BEH<1:0> bits are set to interrupt the host, this bit will cause the ALERT# pin to be

asserted. This bit is cleared when read. This bit is also cleared automatically when the RTN_RST bit is

set or the RTN_EN bit is cleared (see Section 10.4.1 “General Configuration Register”).

= UCS1003-1 has delivered the programmed amount of power to a portable device

= UCS1003-1 has not delivered the programmed amount of power to a portable device

bit 6-5

Unimplemented:

Read as ‘0’

bit 4

CC_MODE:

IBUS Current Indication Status bit

Indicates that the IBUS current has exceeded ILIM. Current is in Region 2 (IBUS_R2MIN).

= IBUS > ILIM

= IBUS < ILIM

bit 3

TREG:

TREG Internal Temperature Indication Status bit

Indicates that the internal temperature has exceeded TREG and that the current limit has been reduced.

This bit is cleared when read and will not cause the ALERT# pin to be asserted unless the ALERT_LINK

bit is set.

= Internal temperature > TREG

= Internal temperature < TREG

bit 2

LOW_CUR:

Portable Device Charge Current Indication Status bit

Indicates that a portable device has reduced its charge current to below ~6.4 mA and may be finished

charging. This bit is cleared when read and will not cause the ALERT# pin to be asserted unless the

ALERT_LINK bit is set.

= IBUS < 6.4 mA

= IBUS > 6.4 mA

bit 1

REM:

Removal Detection Event Status bit

Indicates that a Removal Detection event has occurred and there is no longer a portable device present.

This bit is cleared when read and will not cause the ALERT# pin to be asserted. It will cause the A_DET#

pin to be released.

= Removal detected

= No removal detected

bit 0

ATT:

Attach Detection Event Status bit

Indicates that an Attach Detection event has occurred and there is a new portable device present. This

bit is cleared when read and will not cause the ALERT# pin to be asserted. It will cause the A_DET# pin

to be asserted.

= Attach detected

= No attach detected

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