TUSB8040RKMR datasheet(11/33 Pages) TI

11 / 33 page

TUSB8040

www.ti.com

SLLSE42F

– SEPTEMBER 2010 – REVISED OCTOBER 2011

2.3

USB Downstream Signals

Table 2-3. USB Downstream Signals

PIN NO.

SIGNAL NAME

TYPE

DESCRIPTION

PFP

RKM

USB_SSTXP_DN0

USB SuperSpeed transmitter differential pair (positive)

USB_SSTXM_DN0

USB SuperSpeed transmitter differential pair (negative)

USB_SSRXP_DN0

USB SuperSpeed receiver differential pair (positive)

USB_SSRXM_DN0

USB SuperSpeed receiver differential pair (negative)

USB_DP_DN0

I/O

USB high-speed differential transceiver (positive)

USB_DM_DN0

I/O

USB high-speed differential transceiver (negative)

USB port power on control for downstream power/battery charging enable.

The terminal is used for control of the downstream power switch; in addition, the

value of the terminal is sampled at the de-assertion of reset to determine the value

of the battery charger support for the port as indicated in the Battery Charger

Support register:

PWRON0z_BATEN0

I/O, PD

B19

0 = Battery charging not supported

1 = Battery charging supported

The TUSB8040PFP only supports ganged mode. This terminal provides the port

power control for all downstream ports. This terminal also determines the battery

charging support of all downstream ports.

USB downstream port over-current detection.

The TUSB8040PFP only supports ganged mode. This terminal receives the

over-current indication for all downstream ports.

0 = An overcurrent event has occurred

OVERCUR0z

I, PU

B21

1 = An overcurrent event has not occurred

This terminal should be pulled high using a 10-k

Ω resistor if power management is

not implemented. If power management is enabled, the external circuitry needed

should be determined by the power management device.

USB_SSTXP_DN1

B34

USB SuperSpeed transmitter differential pair (positive)

USB_SSTXM_DN1

A37

USB SuperSpeed transmitter differential pair (negative)

USB_SSRXP_DN1

B33

USB SuperSpeed receiver differential pair (positive)

USB_SSRXM_DN1

A36

USB SuperSpeed receiver differential pair (negative)

USB_DP_DN1

I/O

B36

USB High-speed differential transceiver (positive)

USB_DM_DN1

I/O

A39

USB High-speed differential transceiver (negative)

USB Port 1 Power On Control for Downstream Power/Battery Charging Enable. The

terminal is used for control of the downstream power switch for Port 1. In addition,

the value of the terminal is sampled at the de-assertion of reset to determine the

value of the battery charger support for Port 1 as indicated in the Battery Charger

PWRON1z_BATEN1

I/O, PD

A21

Support register:

0 = Battery Charging Not Supported

1 = Battery Charging Supported

USB Port 1 Over-Current Detection.

0 = An overcurrent event has occurred

1 = An overcurrent event has not occurred

OVERCUR1z

I, PU

A23

This terminal should be pulled high using a 10K resistor if power management is

not implemented. If power management is enabled, the external circuitry needed

should be determined by the power switch.

USB_SSTXP_DN2

USB SuperSpeed transmitter differential pair (positive)

USB_SSTXM_DN2

USB SuperSpeed transmitter differential pair (negative)

USB_SSRXP_DN2

USB SuperSpeed receiver differential pair (positive)

USB_SSRXM_DN2

USB SuperSpeed receiver differential pair (negative)

USB_DP_DN2

I/O

USB High-speed differential transceiver (positive)

USB_DM_DN2

I/O

USB High-speed differential transceiver (negative)

PIN DESCRIPTIONS

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