USB5906 datasheet(12/64 Pages) MICROCHIP

12 / 64 page

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2016-2021 Microchip Technology Inc.

DS00002242E-page 12

USB5906

VBUS Detect

VBUS_DET

This signal detects the state of the upstream bus power.

When designing a detachable hub, this pin must be con-

nected to the VBUS power pin of the upstream USB port

through a resistor divider (50 k

Ω by 100 kΩ) to provide

3.3 V.

For self-powered applications with a permanently

attached host, this pin must be connected to either 3.3 V

or 5.0 V through a resistor divider to provide 3.3 V.

In embedded applications,

VBUS_DET may be controlled

(toggled) when the host desires to renegotiate a connec-

tion without requiring a full reset of the device.

TABLE 3-4:

PORT CONTROL PIN DESCRIPTIONS

Name

Symbol

Buffer

Type

Description

Port 6

Power Enable /

Overcurrent

Sense

PRT_CTL6

I/OD12

(PU)

Port 6 Power Enable / Overcurrent Sense.

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 signal

assertion from an external current monitor on USB port 6.

This pin will change to an output and be driven low when

the port is disabled by configuration or by the host con-

trol.

Port 5

Power Enable /

Overcurrent

Sense

PRT_CTL5

I/OD12

(PU)

Port 5 Power Enable / Overcurrent Sense.

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 signal

assertion from an external current monitor on USB port 5.

This pin will change to an output and be driven low when

the port is disabled by configuration or by the host con-

trol.

TABLE 3-3:

USB 2.0 PIN DESCRIPTIONS (CONTINUED)

Name

Symbol

Buffer

Type

Description

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