LAN9211_0711 SMSC [SMSC Corporation], LAN9211_0711 Datasheet - Page 40

• Manufacturer Part Number: LAN9211_0711
• Description: High-Performance Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX
• Manufacturer: SMSC [SMSC Corporation]

Revision 1.93 (11-27-07)
EEDIO (OUTPUT)
EEDIO (INPUT)
EEDIO (OUTPUT)
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
EEDIO (INPUT)
EECLK
EECS
operations will fail until an Erase/Write Enable command is issued.
EECLK
EECS
1
1
Figure 3.7 EEPROM EWDS Cycle
Figure 3.8 EEPROM EWEN Cycle
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0
DATASHEET
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0
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High-Performance Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX
0
1
0
1
t
CSL
t
CSL
SMSC
Datasheet
LAN9211