SMSC LAN9514 Manual Do Utilizador

USB Hub with Integrated 10/100 Ethernet Controller 

SMSC LAN9514

33

Revision 1.0 (04-20-09)

 

The signature value of 0xA5 is stored at address 0. A different signature value indicates to the
EEPROM controller that no EEPROM or an un-programmed EEPROM is attached to the device. In
this case, the hardware default values are used, as shown in 

.

Certain system level resets (USB reset, POR, nRESET, and SRST) cause the EEPROM contents to
be loaded into the device. After a reset, the EEPROM controller attempts to read the first byte of data
from the EEPROM. If the value 0xA5 is read from the first address, then the EEPROM controller will
assume that the external Serial EEPROM is configured for auto-loading. If a value other than 0xA5 is
read from the first address, the EEPROM auto-load will not commense.

Note: The EEPROM contents are loaded for both the Hub and the Ethernet Controller as a result of

a POR or nRESET. The USB reset results only in the loading of the MAC address from the
EEPROM. A software reset (SRST) or a EEPROM Reload Command causes the EEPROM
contents related solely to the Ethernet Controller to be loaded.

Ethernet Controller 

MAC Address

FFFFFFFFFFFFh

Ethernet Controller 

Full-Speed Polling 

Interval (mS)

01h

Ethernet Controller 

Hi-Speed Polling Interval 

(mS)

04h

Ethernet Controller 

Configuration Flags

05h

Ethernet Controller 

Maximum Power (mA)

01h

Ethernet Controller 

Vendor ID

0424h

Ethernet Controller 

Product ID

EC00h