USB2514 datasheet(41/72 Pages) SMSC

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USB 2.0 Hi-Speed Hub Controller

Datasheet

SMSC USB251x

Revision 1.0 (3-11-09)

DATASHEET

8.2.1.11

8.2.1.12

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 mapping mode is disabled

(PRTMAP_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.

When using the internal default option, the PRT_DIS_P[x:1] and

PRT_DIS_M[x:1] pins will disable the appropriate ports.

Bit 7= Controls Port 7

Bit 6= Controls Port 6

Bit 5= Controls Port 5

Bit 4= Controls Port 4

Bit 3= Controls Port 3

Bit 2= Controls Port 2

Bit 1= Controls Port 1

Bit 0= Reserved, always = ‘0’

BIT

NUMBER

BIT NAME

DESCRIPTION

7:0

PORT_DIS_BP

Port Disable Bus-Powered: Disables 1 or more ports.

0 = Port is available

1 = Port is disabled

During self-powered operation when mapping mode is disabled

(PRTMAP_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.

When using the internal default option, the PRT_DIS_P[x:1] and

PRT_DIS_M[x:1] pins will disable the appropriate ports.

Bit 7= Controls Port 7

Bit 6= Controls Port 6

Bit 5= Controls Port 5

Bit 4= Controls Port 4

Bit 3= Controls Port 3

Bit 2= Controls Port 2

Bit 1= Controls Port 1

Bit 0 is Reserved, always = ‘0’

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