UCS1003-3 datasheet(124/138 Pages) MICROCHIP

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UCS1003-1/2/3

DS20005346B-page 124

 2014-2015 Microchip Technology Inc.

10.14.2

CUSTOM CURRENT-LIMITING

BEHAVIOR CONFIGURATION

The Custom Current Limiting Behavior Configuration

These controls are used when a portable device hand-

shakes using the Legacy charger emulation profiles

(except Legacy 2), the custom charger emulation profile

or does not handshake as a dedicated charger (i.e., a

power thief).

The contents of this register are retained in Sleep.

10.15 Product ID Register

The Product ID register stores a unique 8-bit value that

identifies the UCSXXXX Device Family.

10.16 Manufacturer ID Register

The Manufacturer ID register stores a unique 8-bit

value that identifies Microchip Technology Inc.

10.17 Revision Register

The Revision register stores an 8-bit value that

represents the part revision.

(ADDRESS 51h)(1)

R/W-1

R/W-0

U-0

R/W-0

R/W-1

R/W-0

CS_VBUS_MIN<1:0>

—

CS_R2_IMIN<2:0>

RESERVED

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

CS_VBUS_MIN<1:0>:

Custom VBUS_MIN Voltage Definition bits

Note that VBUS_MIN is checked even when operating with Trip Current Limiting.

= 1.5V

= 1.75V

= 2.0V

= 2.25V

bit 5

Unimplemented:

Read as ‘0’

bit 4-2

CS_R2_IMIN<2:0>:

Custom IBUS_R2MIN Threshold Definition bits

The default is 120 mA. This value is used under the following conditions: when a portable device handshakes

using the Legacy charger emulation profiles (except Legacy 2), the custom charger emulation profile or when

it does not handshake in DCE Cycle (i.e., a power thief). Under these conditions, the Current-Limiting mode

is determined by the relative value of IBUS_R2MIN and ILIM. When IBUS_R2MIN < ILIM or ILIM > 1.68A, Trip

Current-Limiting mode is used; otherwise, CC mode is used.

Define the IBUS_R2MIN current as follows:

000

= 120 mA

001

= 570 mA

010

= 1000 mA

011

= 1350 mA

100

= 1680 mA

101

= 2050 mA

bit 1-0

Reserved:

Do not change

Note 1:

The values specified in this register are typical.

Name

Bits Address

Cof

Default

Product ID

FDh

4Eh

Name

Bits Address

Cof

Default

Manufacturer ID

FEh

5Dh

Name

Bits Address

Cof

Default

Revision

FFh

82h

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