USB3803 datasheet(26/99 Pages) MICROCHIP

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USB3803

DS00001691B-page 26

 2014-2015 Microchip Technology Inc.

5.3.10

5.3.11

Default = 0x00h

2:1

Reserved

STRING_EN

Enables String Descriptor Support

‘0’ = String Support Disabled

‘1’ = String Support Enabled

Bit Number

Bit Name

Description

7:0

NR_DEVICE

Non-Removable Device: Indicates which port(s) include non- removable

devices.

‘0’ = port is removable

‘1’ = port is non- removable.

Informs the Host if one of the active physical ports has a permanent device that

is undetachable from the Hub. (Note: The device must provide its own descriptor

data.)

Bit 7= Reserved

Bit 6= Reserved

Bit 5= Reserved

Bit 4= Reserved

Bit 3= Port 3 non-removable.

Bit 2= Port 2 non-removable.

Bit 1= Port 1 non removable.

Bit 0= Reserved

Bit Number

Bit Name

Description

7:0

PORT_DIS_SP Port Disable Self-Powered: Disables 1 or more ports.

‘0’ = port is available

‘1’ = port is disabled.

During Self-Powered operation, when PRTMAP_EN = ‘0’, this selects the ports

which will be permanently disabled, and are not available to be enabled or enu-

merated by a Host Controller. The ports can be disabled in any order, the inter-

nal logic will automatically report the correct number of enabled ports to the USB

Host, and will reorder the active ports in order to ensure proper function.

Bit 7= Reserved

Bit 6= Reserved

Bit 5= Reserved

Bit 4= Reserved

Bit 3= Port 3 Disable.

Bit 2= Port 2 Disable.

Bit 1= Port 1 Disable.

Bit 0= Reserved

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