TUSB4041IPAPR datasheet(5/44 Pages) TI1

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TUSB4041I

www.ti.com

SLLSEK3B – JULY 2015 – REVISED DECEMBER 2015

Pin Functions (continued)

I/O(1)

TYPE(1)

DESCRIPTION

NAME

NO.

Crystal output. This pin is the crystal output for the internal oscillator. If the XI pin is

—

driven by an external oscillator, this pin may be left unconnected. When using a

crystal, a 1-M

Ω feedback resistor is required between the XI and XO pins.

USB UPSTREAM SIGNALS

USB_DM_UP

I/O

—

USB high-speed differential transceiver (negative)

USB_DP_UP

I/O

—

USB high-speed differential transceiver (positive)

—

Precision resistor reference. Connect a 9.53-k

Ω ±1% resistor between the USB_R1

USB_R1

pin and ground.

—

USB upstream port power monitor. The VBUS detection requires a voltage divider.

USB_VBUS

The signal USB_VBUS must be connected to VBUS through a 90.9-k

Ω ±1% resistor

and to ground through a 10-k

Ω ±1% resistor from the signal to ground.

USB DOWNSTREAM SIGNALS

USB port 1 overcurrent detection. This pin is used to connect the overcurrent output

of the downstream port power switch for port 1.

0 = An overcurrent event occurred.

OVERCUR1z

1 = An overcurrent event has not occurred.

This pin can be left unconnected if power management is not implemented. If power

management is enabled, the necessary external circuitry should be determined by the

power switch.

USB port 2 overcurrent detection. This pin is used to connect the overcurrent output

of the downstream port power switch for port 2.

0 = An overcurrent event occurred.

OVERCUR2z

1 = An overcurrent event has not occurred.

If power management is not implemented, leave this pin unconnected. If power

management is enabled, the necessary external circuitry should be determined by the

power switch.

USB port 3 overcurrent detection. This pin is used to connect the overcurrent output

of the downstream port power switch for port 3.

0 = An overcurrent event occurred.

OVERCUR3z

1 = An overcurrent event has not occurred.

This pin can be left unconnected if power management is not implemented. If power

management is enabled, the necessary external circuitry should be determined by the

power switch.

USB port 4 overcurrent detection. This pin is used to connect the overcurrent output

of the downstream port power switch for port 4.

0 = An overcurrent event occurred.

OVERCUR4z

1 = An overcurrent event has not occurred.

This pin can be left unconnected if power management is not implemented. If power

management is enabled, the necessary external circuitry should be determined by the

power switch.

USB port 1 power-on control for downstream power and battery charging enable. The

pin is used for control of the downstream power switch for port 1.

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

the battery charging support for port 1 as indicated in the Battery Charging Support

PWRCTL1/BATEN1

I/O

0 = Battery charging not supported

1 = Battery charging supported

USB port 2 power-on control for downstream power and battery charging enable. The

pin is used for control of the downstream power switch for port 2.

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

the battery charging support for Port 2 as indicated in the Battery Charging Support

PWRCTL2/BATEN2

I/O

0 = Battery charging not supported

1 = Battery charging supported

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