High Speed Inter-Chip USB 2.0 Hub and Flash Media Controller

Datasheet

 

 

8.4.4.20

F1h: Port Swap

 

 

 

 

BIT

BYTE NAME

DESCRIPTION

 

 

 

7:0

PRT_SWP

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= Controls physical port 3

 

 

Bit 2= Controls physical port 2

 

 

Bit 1= Reserved

 

 

Bit 0= Controls physical port 0

 

 

 

SMSC USB4640/USB4640i

47

Revision 1.0 (06-01-09)

DATASHEET