LAN9500AI datasheet(31/66 Pages) SMSC

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USB 2.0 to 10/100 Ethernet Controller

Datasheet

SMSC LAN950x Family

Revision 1.1 (04-18-13)

DATASHEET

5.3

EEPROM Auto-Load

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 an external Serial EEPROM is present.

Note: The USB reset only loads the MAC address.

5.4

Examples of EEPROM Format Interpretation

5.4.1

LAN9500/LAN9500i

Table 5.5 and Table 5.6 provide an example of how the contents of a EEPROM are formatted in the

case of LAN9500/LAN9500i. Table 5.5 is a dump of the EEPROM memory (256-byte EEPROM), while

Table 5.6 illustrates, byte by byte, how the EEPROM is formatted.

Table 5.5 Dump of EEPROM Memory - LAN9500/LAN9500i

OFFSET

BYTE

VALUE

0000h

A5 12 34 56 78 9A BC 01

0008h

04 04 09 04 0A 0F 10 14

0010h

10 1C 00 00 00 00 12 24

0018h

12 2D 12 36 12 3F 0A 03

0020h

53 00 4D 00 53 00 43 00

0028h

10 03 4C 00 41 00 4E 00

0030h

39 00 35 00 30 00 30 00

0038h

10 03 30 00 30 00 30 00

0040h

35 00 31 00 32 00 33 00

0048h

12 01 00 02 FF 00 01 40

0050h

24 04 00 95 00 01 01 02

0058h

03 01 09 02 27 00 01 01

0060h

00 A0 FA 09 04 00 00 03

0068h

FF 00 FF 00 12 01 00 02

0070h

FF 00 01 40 24 04 00 95

0078h

00 01 01 02 03 01 09 02

0080h

27 00 01 01 00 A0 FA 09

0088h

04 00 00 03 FF 00 FF 00

0090h - 00FFh

..............................................

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