USB2503 datasheet(24/46 Pages) SMSC

24 / 46 page

USB 2.0 High-Speed 4-Port Hub Controller

Datasheet

Revision 1.92 (05-08-07)

SMSC USB2514

DATASHEET

4.3.1.9

4.3.1.10

BIT

NUMBER

BIT NAME

DESCRIPTION

7:4

Reserved

PRTMAP_EN

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

2:1

LED_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.

STRING_EN

Enables String Descriptor Support

‘0’ = String Support Disabled

‘1’ = String Support Enabled

BIT

NUMBER

BIT NAME

DESCRIPTION

7:0

NR_DEVICE

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’

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