USB2517 datasheet(26/58 Pages) MICROCHIP

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USB2517/USB2517I

DS00001598B-page 26

 2013-2016 Microchip Technology Inc.

7.2.1.10

7.2.1.11

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 ports has a permanent device that is

undetachable from the Hub. (Note: The device must provide its own descrip-

tor data.)

When using the internal default option, the NON_REM[1:0] pins will designate

the appropriate ports as being non- removable.

Bit 7= 1; Port 7 non-removable

Bit 6= 1; Port 6 non-removable

Bit 5= 1; Port 5 non-removable

Bit 4= 1; Port 4 non-removable

Bit 3= 1; Port 3 non-removable

Bit 2= 1; Port 2 non-removable

Bit 1= 1; Port 1 non-removable

Bit 0 is Reserved, always = ‘0’

Bit

Number

Bit Name

Description

7:0

PORT_DIS_SP

Port Disable Self-Powered: Disables 1 or more contiguous ports. ‘0’ = port is

available, ‘1’ = port is disabled.

During Self-Powered operation when remapping mode is disabled (PRT-

MAP_EN='0'), this selects the ports which will be permanently disabled, and

are not available to be enabled or enumerated by a Host Controller. The ports

can be disabled in any order, the internal 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= 1; Port 7 is disabled

Bit 6= 1; Port 6 is disabled

Bit 5= 1; Port 5 is disabled

Bit 4= 1; Port 4 is disabled

Bit 3= 1; Port 3 is disabled

Bit 2= 1; Port 2 is disabled

Bit 1= 1; Port 1 is disabled

Bit 0 is Reserved, always = ‘0’

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