LAN9211 datasheet(102/147 Pages) SMSC

102 / 147 page

High-Performance Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX Support

Datasheet

Revision 2.9 (03-01-12)

102

SMSC LAN9211

DATASHEET

30-28

EPC command. This field is used to issue commands to the EEPROM

controller. The EPC will execute commands when the EPC Busy bit is set.

A new command must not be issued until the previous command completes.

This field is encoded as follows:

READ (Read Location): This command will cause a read of the EEPROM

location pointed to by EPC Address. The result of the read is available in

the E2P_DATA register.

EWDS (Erase/Write Disable): After issued, the EEPROM will ignore erase

and write commands. To re-enable erase/write operations issue the EWEN

command.

EWEN (Erase/Write Enable): Enables the EEPROM for erase and write

operations. The EEPROM will allow erase and write operations until the

Erase/Write Disable command is sent, or until power is cycled.

Note:

The EEPROM device will power-up in the erase/write-disabled

state. Any erase or write operations will fail until an Erase/Write

Enable command is issued.

WRITE (Write Location): If erase/write operations are enabled in the

EEPROM, this command will cause the contents of the E2P_DATA register

to be written to the EEPROM location selected by the EPC Address field.

WRAL (Write All): If erase/write operations are enabled in the EEPROM,

this command will cause the contents of the E2P_DATA register to be

written to every EEPROM memory location.

ERASE (Erase Location): If erase/write operations are enabled in the

EEPROM, this command will erase the location selected by the EPC

Address field.

ERAL (Erase All): If erase/write operations are enabled in the EEPROM,

this command will initiate a bulk erase of the entire EEPROM.

RELOAD (MAC Address Reload): Instructs the EEPROM controller to

reload the MAC address from the EEPROM. If a value of 0xA5 is not found

in the first address of the EEPROM, the EEPROM is assumed to be un-

programmed and MAC Address Reload operation will fail. The “MAC

Address Loaded” bit indicates a successful load of the MAC address.

R/W

27-10

Reserved.

BITS

DESCRIPTION

TYPE

DEFAULT

[30]

[29]

[28]

OPERATION

READ

001

EWDS

EWEN

011

WRITE

100

WRAL

ERASE

ERAL

111

Reload

LAN9211 Datasheet(PDF) 102 Page - SMSC Corporation

LAN9211 Datasheet(HTML) 102 Page - SMSC Corporation

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