USB2514 datasheet(33/63 Pages) MICROCHIP

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USB 2.0 Hi-Speed Hub Controller

Datasheet

SMSC USB251xB/xBi

Revision 2.2 (02-17-12)

DATASHEET

5.1.11

5.1.12

BIT

NUMBER

BIT NAME

DESCRIPTION

7:0

PORT_DIS_SP

Port Disable Self-Powered: disables one or more ports.

0 = port is available

1 = port is disabled

Bit 7 : rsvd

Bit 6 : rsvd

Bit 5 : rsvd

Bit 4 : controls port 4

Bit 3 : controls port 3

Bit 2 : controls port 2

Bit 1 : controls port 1

Bit 0 : rsvd

During self-powered operation when mapping mode is disabled

(PRTMAP_EN = 0), this register selects the ports that will be permanently

disabled. These ports are then unavailable and cannot be enabled or

enumerated by a host controller. The ports can be disabled in any order,

where the internal logic will automatically report the correct number of

enabled ports to the USB host. The active ports will be reordered in order

to ensure proper function.

When using the default configuration, PRT_DIS_P[x:1] and PRT_DIS_M[x:1]

pins disable the appropriate ports.

BIT

NUMBER

BIT NAME

DESCRIPTION

7:0

PORT_DIS_BP

Port Disable Bus-Powered: disables one or more ports.

0 = port is available

1 = port is disabled

Bit 7 : rsvd

Bit 6 : rsvd

Bit 5 : rsvd

Bit 4 : controls port 4

Bit 3 : controls port 3

Bit 2 : controls port 2

Bit 1 : controls port 1

Bit 0 : rsvd

During self-powered operation when mapping mode is disabled

(PRTMAP_EN = 0), this selects the ports which will be permanently

disabled.These ports are then unavailable and cannot be enabled or

enumerated by a host controller. The ports can be disabled in any order,

where the internal logic will automatically report the correct number of

enabled ports to the USB host. The active ports will be reordered 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 disable the appropriate ports.

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