Smsc LAN9512 User Manual download pdf (Page 23)

USB Hub with Integrated 10/100 Ethernet Controller

Datasheet

SMSC LAN9512 23 Revision 1.0 (04-20-09)

DATASHEET

3.1.1 Hub Configuration

EEPROM offsets 20h through 39h comprise the Hub Configuration parameters. Table 3.3 describes

these parameters and their default ROM values (Values assumed if no valid EEPROM present).

Table 3.3 Hub Configuration

EEPROM

OFFSET DESCRIPTION DEFAULT

20h Vendor ID LSB Register (VIDL)

Least Significant Byte of the Vendor ID. This is a 16-bit value that uniquely identifies

the Vendor of the user device (assigned by USB-Interface Forum).

24h

21h Vendor ID MSB (VIDM)

Most Significant Byte of the Vendor ID. This is a 16-bit value that uniquely identifies

the Vendor of the user device (assigned by USB-Interface Forum).

04h

22h Product ID LSB Register (PIDL)

Least Significant Byte of the Product ID. This is a 16-bit value that the Vendor can

assign that uniquely identifies this particular product (assigned by the OEM).

12h

23h Product ID MSB Register (PIDM)

Most Significant Byte of the Product ID. This is a 16-bit value that the Vendor can

assign that uniquely identifies this particular product (assigned by the OEM).

95h

24h Device ID LSB Register (DIDL)

Least Significant Byte of the Device ID. This is a 16-bit device release number in BCD

format (assigned by the OEM).

00h

25h Device ID MSB Register (DIDM)

Most Significant Byte of the Device ID. This is a 16-bit device release number in BCD

format (assigned by the OEM).

Note 3.1

26h Config Data Byte 1 Register (CFG1)

Refer to Table 3.4, “Config Data Byte 1 Register (CFG1) Format,” on page 28 for

details.

9Bh

27h Config Data Byte 2 Register (CFG2)

Refer to Table 3.5, “Config Data Byte 2 Register (CFG2) Format,” on page 29 for

details.

18h

28h Config Data Byte 3 Register (CFG3)

Refer to Table 3.6, “Config Data Byte 3 Register (CFG3) Format,” on page 30 for

details.

00h

29h Non-Removable Devices Register (NRD)

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 not

detachable from the Hub.

Note: The device must provide its own descriptor data.

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 = 0b

Note: Bit 1 must be set to 1 by firmware for proper identification of the Ethernet

Controller as a non-removable device.

02h

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 45 46

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