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TUSB4041I

SLLSEK3E – JULY 2015 – REVISED SEPTEMBER 2017

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Table 13. Device Configuration Register 2 Field Descriptions (continued)

Bit

Field

Type

Reset

Description

(1)

When the upstream port is connected, battery charging 1.2 CDP mode will be supported on all ports that are enabled for battery

charging support regardless of the value of this bit, with the exception of port 1. CDP on port 1 is not supported when automatic mode is

enabled.

4

HiCurAcpModeEn

R/RW

0

High-current ACP mode enable

This bit enables the high-current tablet charging mode when the automatic

battery charging mode is enabled for downstream ports.

0 = High-current divider mode disabled. Legacy current divider mode

enabled.

1 = High-current divider mode enabled

This bit is read only unless the customBCfeatures bit is set to 1. If

customBCfeatures is 0, the value of this bit reflects the value of the

OTP ROM HiCurAcpModeEn bit.

3

cpdEN

RRW

0

Enable device attach detection

This bit enables device attach detection (such as a cell-phone detect) when

auto mode is enabled.

0 = Device attach detect is disabled in auto mode.

1 = Device attach detect is enabled in auto mode.

This bit is read only unless the customBCfeatures bit is set to 1. If

customBCfeatures is 0, the value of this bit reflects the value of the OTP ROM

cpdEN bit.

2

RSVD

RW

0

Reserved

1

autoModeEnz

RW

X

Automatic mode enable(1)

This bit is loaded at the deassertion of reset with the value of the

AUTOENz/HS_SUSPEND pin.

The automatic mode only applies to downstream ports with battery charging

enabled when the upstream port is not connected. Under these conditions:

0 = Automatic mode battery charging features are enabled.

1 = Automatic mode is disabled; only battery-charging DCP mode is

supported.

0

RSVD

R

0

Reserved

Read only, returns 0 when read.