2-Port USB 2.0 Hub Controller

Datasheet

BIT

 

 

 

NUMBER

BIT NAME

 

DESCRIPTION

 

 

 

5:4

OC_TIMER

OverCurrent Timer: Over Current Timer delay.

 

 

00

= 0.1ms

 

 

01

= 2ms (Default)

 

 

10

= 4ms

 

 

11 = 6ms

 

 

 

3

COMPOUND

Compound Device: Designates if Hub is part of a compound device.

 

 

0 = No. (Default)

 

 

1 = Yes, Hub is part of a compound device.

 

 

 

2:0

Reserved

Reserved.

 

 

 

 

5.2.3.6EEPROM Offset 8(h) - Non-Removable Device

BIT

 

 

NUMBER

BIT NAME

DESCRIPTION

 

 

 

7:0

NR_DEVICE

Non-Removable Device: Indicates which port(s) include non-removable devic-

 

 

es. ‘0’ = port is removable, ‘1’ = port is non-removable.

 

 

Bit 7:3= 0; Reserved

 

 

Bit 2= 1; Port 2 non-removable.

 

 

Bit 1= 1; Port 1 non removable.

 

 

Bit 0 is Reserved, always = ‘0’.

 

 

 

5.2.3.7EEPROM Offset 9(h) - Port Disable For Self Powered Operation

BIT

 

 

 

NUMBER

BIT NAME

 

DESCRIPTION

 

 

 

7:0

PORT_DIS_SP

Port Disable Self-Powered: Disables 1 or more contiguous ports. ‘0’ = port

 

 

is available, ‘1’ = port is disabled.

 

 

Bit 7:3= 0; Reserved

 

 

Bit 2= 1; Port 2

is disabled.

 

 

Bit 1= 1; Port 1

is disabled.

 

 

Bit 0 is Reserved, always = ‘0’

 

 

 

 

5.2.3.8EEPROM Offset A(h) - Port Disable For Bus Powered Operation

BIT

 

 

 

NUMBER

BIT NAME

 

DESCRIPTION

 

 

 

7:0

PORT_DIS_BP

Port Disable Bus-Powered: Disables 1 or more contiguous ports. ‘0’ = port

 

 

is available, ‘1’ = port is disabled.

 

 

Bit 7:3= 0; Reserved

 

 

Bit 2= 1; Port 2

is disabled.

 

 

Bit 1= 1; Port 1

is disabled.

 

 

Bit 0 is Reserved, always = ‘0’

 

 

 

 

Revision 2.3 (08-27-07)

22

SMSC USB2502

 

DATASHEET