USB5533B datasheet(45/71 Pages) MICROCHIP

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 2012 - 2015 Microchip Technology Inc.

DS00001680C-page 45

USB5533B

5.6.19

PORT POWER INPUT REGISTER

5.6.20

PORT POWER PULL-UP RESISTOR REGISTER

5.6.21

PORT 1 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 5-36:

PORT POWER INPUT REGISTER

PRT_PWR_IN

(0X093A)

Port Power Input Register

Bit

Name

R/W

Description

7:1

PRT_PWR[7:1]

PRT[7:1] Input Buffer Data.

Reserved

TABLE 5-37:

PORT POWER PULL-UP RESISTOR REGISTER

PRT_PWR_PU

(0X093E)

Port Power PULL UP REGISTER

BIT

NAME

R/W

DESCRIPTION

7:1

PRT_PWR_PU[7:1]

R/W

“0” = Disables the pull-up resistor on the PRT_PWR[N] pad. Where N is

the bit being controlled. Bit 1 controls PRT_PWR 1 and so on.

“1” = Enables the pull-up resistor on the PIO pad.

Reserved

TABLE 5-38:

PORT 1 POWER SELECT REGISTER

PRT_PWR_SEL1

(0X3C00)

Port 1 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.

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