TUSB4041IPAP datasheet(6/44 Pages) TI1

6 / 44 page

TUSB4041I

SLLSEK3B – JULY 2015 – REVISED DECEMBER 2015

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Pin Functions (continued)

I/O(1)

TYPE(1)

DESCRIPTION

NAME

NO.

USB port 3 power-on control for downstream power and battery charging enable. The

pin is used for control of the downstream power switch for port 3.

The value of the pin is sampled at the deassertion of reset to determine the value of

the battery charging support for Port 3 as indicated in the Battery Charging Support

PWRCTL3/BATEN3

I/O

0 = Battery charging not supported

1 = Battery charging supported

USB port 4 power-on control for downstream power and battery charging enable. The

pin is used for control of the downstream power switch for port 4.

The value of the pin is sampled at the deassertion of reset to determine the value of

the battery charging support for Port 4 as indicated in the Battery Charging Support

PWRCTL4/BATEN4

I/O

0 = Battery charging not supported

1 = Battery charging supported

USB_DM_DN1

USB_DM_DN2

I/O

—

USB high-speed differential transceiver (negative)

USB_DM_DN3

USB_DM_DN4

USB_DP_DN1

USB_DP_DN2

I/O

—

USB high-speed differential transceiver (positive)

USB_DP_DN3

USB_DP_DN4

I2C AND SMBus SIGNALS

I2C clock/SMBus clock. The function of this pin depends on the setting of the

SMBUSz input.

When SMBUSz = 1, this pin functions as the serial clock interface for an I2C

EEPROM.

SCL/SMBCLK

I/O

When SMBUSz = 0, this pin functions as the serial clock interface for an SMBus

host.

This pin can be left unconnected if external interface not implemented.

I2C data/SMBus data. The function of this pin depends on the setting of the SMBUSz

input.

When SMBUSz = 1, this pin functions as the serial data interface for an I2C

EEPROM.

SDA/SMBDAT

I/O

When SMBUSz = 0, this pin functions as the serial data interface for an SMBus

host.

This pin can be left unconnected if the external interface is not implemented.

I2C/SMBus mode select. The value of the pin is sampled at the deassertion of reset

set I2C or SMBus mode as follows:

1 = I2C mode selected

0 = SMBus mode selected

SMBUSz

I/O

This pin can be left unconnected if the external interface is not implemented.

After reset, this signal is driven low by the TUSB4041I. Because of this behavior, TI

recommends not to tie directly to supply, but instead pull up or pull down using

external resistor.

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