Datasheet

Hi-Speed USB 2.0 to 10/100/1000 Ethernet Controller
Datasheet
Revision 1.0 (11-01-10) 24 SMSC LAN7500/LAN7500i
DATASHEET
3.2 EEPROM Defaults
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 Tab l e 3. 5.
Note: Refer to the LAN7500/LAN7500i Vendor/Product ID application note for details on proper
usage of these fields.
3.3 EEPROM Auto-Load
Certain system level resets (USB reset, 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 A5h is read from the first address, then the EEPROM controller will
assume that a programmed external Serial EEPROM is present.
Note: The USB reset only loads the MAC address.
1 PME Magic Packet Enable
When GPIO PME WOL Select indicates WOL is selected, this bit enables/disables Magic Packet
detection and wakeup.
0 = Magic Packet event wakeup disabled.
1 = Magic Packet event wakeup enabled.
Note: This bit is ignored if GPIO PME WOL Select indicates WOL event wakeup not supported.
0 PME Perfect DA Enable
When GPIO PME WOL Select indicates WOL is selected, this bit enables/disables Perfect DA detection
and wakeup.
0 = Perfect DA event wakeup disabled.
1 = Perfect DA event wakeup enabled.
Note: This bit is ignored if GPIO PME WOL Select indicates WOL event wakeup not supported.
Table 3.5 EEPROM Defaults
FIELD DEFAULT VALUE
MAC Address FFFFFFFFFFFFh
Full-Speed Polling Interval (mS) 01h
Hi-Speed Polling Interval (mS) 04h
Configuration Flags 0 1Bh
Maximum Power (mA) FAh
Vendor ID 0424h
Product ID 7500h
Table 3.4 GPIO PME Flags (continued)
BITS DESCRIPTION