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LAN9211_12 Datasheet, PDF (40/147 Pages) SMSC Corporation – High-Performance Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX Support
High-Performance Small Form Factor Single-Chip Ethernet Controller with 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 3.13 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 3.14 EEPROM EWEN Cycle
Revision 2.9 (03-01-12)
40
DATASHEET
SMSC LAN9211