LAN9220 datasheet(96/142 Pages) MICROCHIP

96 / 142 page

LAN9220

DS00002417A-page 96

 2006-2017 Microchip Technology Inc.

5.4.2

ADDRH—MAC ADDRESS HIGH REGISTER

The MAC Address High register contains the upper 16-bits of the physical address of the MAC. The contents of this

EEPROM is detected. The least significant byte of this register (bits [7:0]) is loaded from address 0x05 of the EEPROM.

The second byte (bits [15:8]) is loaded from address 0x06 of the EEPROM. Please refer to Section 4.6 for more infor-

mation on the EEPROM. Section 5.4.3 details the byte ordering of the ADDRL and ADDRH registers with respect to the

reception of the Ethernet physical address.

5.4.3

ADDRL—MAC ADDRESS LOW REGISTER

The MAC Address Low register contains the lower 32 bits of the physical address of the MAC. The contents of this reg-

ister are optionally loaded from the EEPROM at power-on through the EEPROM Controller if a programmed EEPROM

is detected. The least significant byte of this register (bits [7:0]) is loaded from address 0x01 of the EEPROM. The most

significant byte of this register is loaded from address 0x04 of the EEPROM. Please refer to Section 4.6 for more infor-

mation on the EEPROM.

Offset:

Attribute:

R/W

Default Value:

0000FFFFh

Size:

32 bits

Bits

Description

31-16

Reserved

15-0

Physical Address [47:32]. This field contains the upper 16-bits (47:32) of the Physical Address of

the LAN9220 device. The content of this field is undefined until loaded from the EEPROM at power-

on. The host can update the contents of this field after the initialization process has completed.

Offset:

Attribute:

R/W

Default Value:

FFFFFFFFh

Size:

32 bits

Bits

Description

31-0

Physical Address [31:0]. This field contains the lower 32 bits (31:0) of the Physical Address of the

LAN9220 device. The content of this field is undefined until loaded from the EEPROM at power-on.

The host can update the contents of this field after the initialization process has completed.

LAN9220 Datasheet(PDF) 96 Page - Microchip Technology

LAN9220 Datasheet(HTML) 96 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL