USB2514 Datasheet, PDF (24/46 Pages) SMSC Corporation – USB 2.0 High-Speed 4-Port Hub Controller

4.3.1.9
USB 2.0 High-Speed 4-Port Hub Controller
Datasheet
Register 08h: Configuration Data Byte 3 (Reset = 0x00)
BIT
NUMBER
7:4
3
2:1
0
BIT NAME
Reserved
PRTMAP_EN
LED_MODE
STRING_EN
DESCRIPTION
Reserved
Port Re-mapping enable: Selects the method used by the hub to assign port
numbers and disable ports.
‘0’ = Standard Mode
‘1’ = Port Re-map mode
LED Mode Selection: The LED_A[4:1]_N and LED_B[4:1]_N pins support
several different modes of operation.
‘00’ = USB Mode
‘01’ = Speed Indication Mode
‘10’ = Same as ‘00’, USB Mode
‘11’ = Same as ‘00’, USB Mode
Warning: Do not enable an LED mode that requires LED pins that are not
available in the specific package being used in the implementation!
Note:
The Hub will only report that it supports LED's to the host when
USB mode is selected. All other modes will be reported as No LED
Support.
Enables String Descriptor Support
‘0’ = String Support Disabled
‘1’ = String Support Enabled
4.3.1.10 Register 09h: Non-Removable Device (Reset = 0x00)
BIT
NUMBER
7:0
BIT NAME
NR_DEVICE
DESCRIPTION
Non-Removable Device: Indicates which port(s) include non-removable
devices. ‘0’ = port is removable, ‘1’ = port is non-removable.
Informs the Host if one of the active ports has a permanent device that is
undetachable from the Hub. (Note: The device must provide its own
descriptor data.)
When using the internal default option, the NON_REM[1:0] pins will
designate the appropriate ports as being non- removable.
Bit 7= Reserved
Bit 6= Reserved
Bit 5= Reserved
Bit 4= 1; Port 4 non-removable
Bit 3= 1; Port 3 non-removable
Bit 2= 1; Port 2 non-removable
Bit 1= 1; Port 1 non removable
Bit 0 is Reserved, always = ‘0’
Revision 1.92 (05-08-07)
24
DATASHEET
SMSC USB2514