Integrated USB 2.0 Compatible 7-Port Hub

 

 

 

 

 

Datasheet

 

 

Table 5.1 User-Defined Descriptor Data (continued)

 

 

 

 

 

 

 

 

 

DEFAULT

DEFAULT

 

 

BYTE

 

CFG

CFG

 

 

MSB:

SIZE

SELF

BUS

 

FIELD

LSB

(BYTES)

(HEX)

(HEX)

DESCRIPTION

 

 

 

 

 

 

Hub Controller

E

1

64

64

Max Current (expressed in 2mA units).

Max Current

 

 

 

 

 

Bus-Powered

 

 

 

 

 

 

 

 

 

 

 

Power-On

F

1

32

32

Time until power is stable.

Time

 

 

 

 

 

 

 

 

 

 

 

5.2.3.1EEPROM Offset 1:0(h) - Vendor ID

BIT

 

 

NUMBER

BIT NAME

DESCRIPTION

 

 

 

15:8

VID_MSB

Most Significant Byte of the Vendor ID.

 

 

 

7:0

VID_LSB

Least Significant Byte of the Vendor ID.

 

 

 

5.2.3.2EEPROM Offset 3:2(h) - Product ID

BIT

 

 

NUMBER

BIT NAME

DESCRIPTION

 

 

 

15:8

PID_MSB

Most Significant Byte of the Product ID.

 

 

 

7:0

PID_LSB

Least Significant Byte of the Product ID.

 

 

 

5.2.3.3EEPROM Offset 5:4(h) - Device ID

BIT

 

 

NUMBER

BIT NAME

DESCRIPTION

 

 

 

15:8

DID_MSB

Most Significant Byte of the Device ID.

 

 

 

7:0

DID_LSB

Least Significant Byte of the Device ID.

 

 

 

5.2.3.4EEPROM Offset 6(h) - CONFIG_BYTE_1

BIT

 

 

 

NUMBER

BIT NAME

 

DESCRIPTION

 

 

 

7

SELF_BUS_PWR

Self or Bus Power: Selects between Self- and Bus-Powered operation.

 

 

0

= Bus-Powered operation. (BUS Default)

 

 

1

= Self-Powered operation. (SELF Default)

 

 

Note: If Dynamic Power Switching is enabled, this bit is ignored and the

 

 

SELF_PWR pin is used to determine if the hub is operating from self or bus

 

 

power.

 

 

 

6

PORT_IND

Port Indicator Support: Indicates implementation of LED indicators

 

 

0

= No LED indicators.

 

 

1

= LED indicators.

 

 

 

 

Revision 2.3 (08-27-07)

20

SMSC USB2507

 

DATASHEET