USB2503 datasheet(21/43 Pages) SMSC

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Integrated USB 2.0 Compatible 3-Port Hub

Datasheet

SMSC USB2503/USB2503A

Revision 2.3 (08-27-07)

DATASHEET

5.2.3.6

EEPROM Offset 8(h) - Non-Removable Device

5.2.3.7

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

5.2.3.8

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

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= Reserved

Bit 6= Reserved

Bit 5= Reserved

Bit 4= Reserved

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’.

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= Reserved

Bit 6= Reserved

Bit 5= Reserved

Bit 4= Reserved.

Bit 3= 1; Port 3 is disabled.

Bit 2= 1; Port 2 is disabled.

Bit 1= 1; Port 1 is disabled.

Bit 0 is Reserved, always = ‘0’

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= Reserved

Bit 6= Reserved

Bit 5= Reserved

Bit 4= Reserved.

Bit 3= 1; Port 3 is disabled.

Bit 2= 1; Port 2 is disabled.

Bit 1= 1; Port 1 is disabled.

Bit 0 is Reserved, always = ‘0’

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