SMSC USB2512A Register FBh: Port Remap, BIT, Note:, NUMBER, BIT NAME, DESCRIPTION, Table 4.2 Port Remap Register for Ports 1 &

USB 2.0 Hi-Speed 2-Port Hub Controller

Datasheet
4.2.1.21	Register FBh: Port Remap 12
BIT
NUMBER	BIT NAME	DESCRIPTION
7:0	PRTR12	Port remap register for ports 1 & 2.
		When a hub is enumerated by a USB Host Controller, the hub is only
		permitted to report how many ports it has; the hub is not permitted to select
		a numerical range or assignment. The Host Controller will number the
		downstream ports of the hub starting with the number '1', up to the number
		of ports that the hub reported having.
		The host's port number is referred to as "Logical Port Number" and the
		physical port on the hub is the “Physical Port Number". When remapping
		mode is enabled (see PRTMAP_EN in Register 08h: Configuration Data
		Byte 3) the hub's downstream port numbers can be remapped to different
		logical port numbers (assigned by the host).
		Note: The OEM must ensure that Contiguous Logical Port Numbers are
		used, starting from #1 up to the maximum number of enabled ports;
		this ensures that the hub's ports are numbered in accordance with
		the way a Host will communicate with the ports.

Table 4.2 Port Remap Register for Ports 1 & 2

Bit [7:4]	‘0000’	Physical Port 2 is Disabled
	‘0001’	Physical Port 2 is mapped to Logical Port 1
	‘0010’	Physical Port 2 is mapped to Logical Port 2
	‘0011’	Illegal; Do Not Use
	to
	‘1111’
Bit [3:0]	‘0000’	Physical Port 1 is Disabled
	‘0001’	Physical Port 1 is mapped to Logical Port 1
	‘0010’	Physical Port 1 is mapped to Logical Port 2
	‘0011’	Illegal; Do Not Use
	to
	‘1111’

SMSC USB2512A	23	Revision 1.96 (07-11-08)
	DATASHEET