USB 2.0 High-Speed 2-Port Hub Controller

Datasheet

4.2.1.20Register FAh: Port Swap

BIT

 

 

NUMBER

BIT NAME

DESCRIPTION

 

 

 

7:0

PRTSP

Port Swap: Swaps the Upstream and Downstream USB DP and DM Pins for

 

 

ease of board routing to devices and connectors.

 

 

‘0’ = USB D+ functionality is associated with the DP pin and D- functionality

 

 

is associated with the DM pin.

 

 

‘1’ = USB D+ functionality is associated with the DM pin and D- functionality

 

 

is associated with the DP pin.

 

 

Bit 7= Reserved

 

 

Bit 6= Reserved

 

 

Bit 5= Reserved

 

 

Bit 4= Reserved

 

 

Bit 3= Reserved

 

 

Bit 2= ‘1’; Port 2 DP/DM is Swapped.

 

 

Bit 1= ‘1’: Port 1 DP/DM is Swapped.

 

 

Bit 0= ‘1’:Upstream Port DP/DM is Swapped

 

 

 

Revision 1.92 (11-28-07)

22

SMSC USB2512

 

DATASHEET