- Standard Microsystems 2-Port Hub Controller Specification Sheet

Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller
Datasheet
Revision 1.92 (11-28-07) 22 SMSC USB2512i
DATASHEET
4.2.1.20 Register 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