TUSB8041 datasheet(13/48 Pages) TI1

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TUSB8041

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SLLSEE4D – JUNE 2014 – REVISED JANUARY 2016

Feature Description (continued)

In addition, to standard DCP mode, the TUSB8041 provides a mode (AUTOMODE) which automatically provides

support for DCP devices and devices that support custom charging indication. When in AUTOMODE, the port will

automatically switch between a divider mode and the DCP mode depending on the portable device connected.

The divided mode places a fixed DC voltage on the ports DP and DM signals which allows some devices to

identify the capabilities of the charger. The default divider mode indicates support for up to 5W. The divider mode

can be configured to report a high-current setting (up to 10 W) through REG_Ah (HiCurAcpModeEn).

The battery charging mode for each port is dependent on the state of Reg_6h(batEn[n]), the status of the VBUS

input, and the state of REG_Ah(autoModeEnz) upstream port as identified in Table 1.

Table 1. TUSB8041 Battery Charging Modes

BC Mode Port x

batEn[n]

VBUS

autoModeEnz

(x = n + 1)

Don’t Care

Automode(1) (2)

< 4 V

DCP(3) (4)

> 4 V

Don’t Care

CDP(3)

(1)

Auto-mode automatically selects divider-mode or DCP mode.

(2)

Divider mode can be configured for high-current mode through register or OTP settings.

(3)

USB Device is USB Battery Charging Specification Revision 1.2 Compliant

(4)

USB Device is Chinese Telecommunications Industry Standard YD/T 1591-2009

8.3.2

USB Power Management

The TUSB8041 can be configured for power switched applications using either per-port or ganged power-enable

controls and over-current status inputs.

Power switch support is enabled by REG_5h (fullPwrMgmtz) and the per-port or ganged mode is configured by

REG_5h(ganged).

The TUSB8041 supports both active high and active low power-enable controls. The PWRCTL[4:1] polarity is

configured by REG_Ah(pwrctlPol).

8.3.3 One Time Programmable (OTP) Configuration

The TUSB8041 allows device configuration through one time programmable non-volatile memory (OTP). The

programming of the OTP is supported using vendor-defined USB device requests. For details using the OTP

features please contact your TI representative.

The table below provides a list features which may be configured using the OTP.

Table 2. OTP Configurable Features

CONFIGURATION REGISTER

BIT FIELD

DESCRIPTION

OFFSET

REG_01h

[7:0]

Vendor ID LSB

REG_02h

[7:0]

Vendor ID MSB

REG_03h

[7:0]

Product ID LSB

REG_04h

[7:0]

Product ID MSB

Port removable configuration for downstream ports 1. OTP

REG_07h

[0]

configuration is inverse of rmbl[3:0], i.e. 1 = not removable, 0 =

removable.

Port removable configuration for downstream ports 2. OTP

REG_07h

[1]

configuration is inverse of rmbl[3:0], i.e. 1 = not removable, 0 =

removable.

Port removable configuration for downstream ports 3. OTP

REG_07h

[2]

configuration is inverse of rmbl[3:0], i.e. 1 = not removable, 0 =

removable.

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