SMSC USB2514 - Manual (Page 31)

USB 2.0 High-Speed 4-Port Hub Controller
Datasheet
SMSC USB2514 31 Revision 1.98 (11-19-07)
DATASHEET
4.3.1.28 Register FAh: Port Swap
4.3.1.29 Register FBh: Port Remap 12
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= ‘1’; Port 4 DP/DM is Swapped.
Bit 3= ‘1’; Port 3 DP/DM is Swapped.
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
BIT
NUMBER BIT NAME DESCRIPTION