LAN9220 View Datasheet(PDF) - SMSC -> Microchip

Part Name

Description

Manufacturer

LAN9220

16-bit Non-PCI Small Form Factor 10/100 Ethernet Controller with Variable Voltage I/O & HP Auto-MDIX Support

SMSC -> Microchip 

16-bit Non-PCI Small Form Factor 10/100 Ethernet Controller with Variable Voltage I/O & HP Auto-MDIX Support

Datasheet

EWDS (Erase/Write Disable): After issued, the EEPROM will ignore erase and write commands. To

re-enable erase/write operations issue the EWEN command.

tCSL

EECS

EECLK

EEDIO (OUTPUT)

1

0

0

0

0

EEDIO (INPUT)

Figure 3.7 EEPROM EWDS Cycle

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.

tCSL

EECS

EECLK

EEDIO (OUTPUT)

1

0

0

1

1

EEDIO (INPUT)

Figure 3.8 EEPROM EWEN Cycle

SMSC LAN9220

41

DATASHEET

Revision 2.7 (03-15-10)

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