USB5537B datasheet(46/79 Pages) MICROCHIP

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USB5537B

DS00001682C-page 46

 2012 - 2015 Microchip Technology Inc.

5.6.22

PORT 2 POWER SELECT REGISTER

The bits in this register are configured via a configuration file. Users must not change the values of these settings

dynamically.

5.6.23

PORT 3 POWER SELECT REGISTER

The bits in this register are configured via a configuration file. Users must not change the values of these settings

dynamically.

TABLE 5-39:

PORT 2 POWER SELECT REGISTER

PRT_PWR_SEL2

(0X3C04)

Port 2 Power Select

Bit

Name

R/W

Description

COMBINED_MODE

R/W

0 - The Port Power and over-current sense use separate pins.

1 - The Port Power and over-current sense use the same pins.

Reserved

DISABLED

R/W

When set this disables the port. Used to inform the hub a port is

permanently disabled.

NR_DEVICE

R/W

When set indicates this port has a permanently attached device.

3:0

PRT_SEL

R/W

This selects the source for the port power for port1

0000b - Port Power is disabled for this Port.

0001b - Port is on if USB2 port power is on

0010b - Port is on if USB3 port power is on

0011b - Port is on if USB2 or USB3 port power is on

0100b - Port is on if designated GPIO is on

All other values are reserved.

Note:

The port disable, port non-removable and combined mode bits must be set through a configuration file to

ensure functionality when the part enumerates.

TABLE 5-40:

PORT 3 POWER SELECT REGISTER

PRT_PWR_SEL3

(0X3C08)

Port 3 Power Select

Bit

Name

R/W

Description

COMBINED_MODE

R/W

0 - The Port Power and over-current sense use separate pins.

1 - The Port Power and over-current sense use the same pins.

Reserved

DISABLED

R/W

When set this disables the port. Used to inform the hub a port is

permanently disabled.

NR_DEVICE

R/W

When set indicates this port has a permanently attached device.

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