EVB-LAN7500-LC SMSC, EVB-LAN7500-LC Datasheet - Page 19

• Manufacturer Part Number: EVB-LAN7500-LC
• Description: EVALUATION BOARD FOR LAN7500
• Manufacturer: SMSC

Specifications of EVB-LAN7500-LC

• Design Resources: EVB-LAN7500-LC BOM EVB-LAN7500-LC Gerber Files EVB-LAN7500-LC Schematic
• Main Purpose: Interface, Ethernet Controller (PHY and MAC)
• Embedded: No
• Utilized Ic / Part: LAN7500
• Primary Attributes: USB 2.0 to 10/100/1000 Ethernet Controller
• Secondary Attributes: IEEE 802.3, IEEE 802.3u, IEEE 802.3ab Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 638-1105; EVB-LAN7500

Hi-Speed USB 2.0 to 10/100/1000 Ethernet Controller
Datasheet
Chapter 3 EEPROM Controller (EPC)
SMSC LAN7500/LAN7500i
3.1
EEPROM ADDRESS
EEPROM Format
0Ah
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
LAN7500/LAN7500i may use an external EEPROM to store the default values for the USB descriptors
and the MAC address. The EEPROM controller supports most “93C56 or 93C66” type 256/512 byte
EEPROMs. A total of nine address bits are used for connection to the device.
Note: A 3-wire style 2K/4K EEPROM that is organized for 256/512 x 8-bit operation must be used.
The MAC address is used as the default Ethernet MAC address and is loaded into the device’s MAC
address registers. If a properly configured EEPROM is not detected, it is the responsibility of the Host
LAN Driver to set the IEEE addresses.
After a system-level reset occurs, the device will load the default values from a properly configured
EEPROM. The device will not accept USB transactions from the Host until this process is completed.
The device’s EEPROM controller also allows the Host system to read, write and erase the contents of
the Serial EEPROM.
Table 3.1
Note the EEPROM offsets are given in units of 16-bit word offsets. A length field with a value of zero
indicates that the field does not exist in the EEPROM. The device will use the field’s HW default value
in this case.
Note: For the device descriptor, the only valid values for the length are 0 and 18.
Note: For the configuration and interface descriptor, the only valid values for the length are 0 and 18.
Note: The EEPROM programmer must ensure that if a string descriptor does not exist in the
Note: If all string descriptor lengths are zero, then a Language ID will not be supported.
EEPROM, the referencing descriptor must contain 00h for the respective string index field.
illustrates the format in which data is stored inside of the EEPROM.
A5h (EEPROM Programmed Indicator)
MAC Address [7:0]
MAC Address [15:8]
MAC Address [23:16]
MAC Address [31:24]
MAC Address [39:32]
MAC Address [47:40]
Full-Speed Polling Interval for Interrupt Endpoint
Hi-Speed Polling Interval for Interrupt Endpoint
Configuration Flags 0
Language ID Descriptor [7:0]
Table 3.1 EEPROM Format
DATASHEET
19
EEPROM CONTENTS
Revision 1.0 (11-01-10)