USB4715 datasheet(9/47 Pages) MICROCHIP

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DS00002514B-page 9

USB4715

3.2

Pin Descriptions

TABLE 3-2:

PIN DESCRIPTIONS

Name

Symbol

Buffer

Type

Description

USB Interface

USB Upstream

D+

USBH_DP0

I/O-U

Upstream USB 2.0 Data Plus (D+)

USB Upstream

D-

USBH_DM0

I/O-U

Upstream USB 2.0 Data Minus (D-)

USB

Downstream

Ports 4-1 D+

FLEX_USB_DP[4:1]

I/O-U

Downstream USB 2.0 Ports 4-1 Data Plus (D+)

USB

Downstream

Ports 4-1 D-

FLEX_USB_DM[4:1]

I/O-U

Downstream USB 2.0 Ports 4-1 Data Minus (D-)

USB Port Control Pins

USB Ports 4-1

Power Enable

PRT_CTL[4:1]

I/O12

When the downstream port is enabled, this pin is set as

an input with an internal pull-up resistor applied. The

internal pull-up enables power to the downstream port

while the pin monitors for an active low overcurrent sig-

nal assertion from an external current monitor on USB

port 4. This pin will change to an output and be driven

low when the port is disabled by configuration or by the

host control.

USB Ports 4-1

Overcurrent

Sense

OCS[4:1]

I/O12

Overcurrent sense for ports 4-1.

Gang Power

PRT_CTL_GANG

I/O12

This pin becomes the port control pin for all downstream

ports when the hub is configured for ganged port power

control mode. All port power controllers are controlled

from this pin when the hub is configured for ganged port

power mode.

SPI Interface Pins

SPI Clock

SPI_CLK

I/O4

SPI clock.

SPI Data Out

SPI_DO

I/O4

SPI output data. If the SPI interface is enabled, this sig-

nal is the data out for the SPI port.

SPI Data In

SPI_DI

I/O4

SPI input data. If the SPI interface is enabled, this signal

must have a weak pull-down applied at all times to pre-

vent floating.

Note:

If SPI interface is not utilized, this pin cannot

be left floating. It must be connected per the

CFG_BC_EN pin description.

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