LAN9221i SMSC [SMSC Corporation], LAN9221i Datasheet - Page 42
LAN9221i
Manufacturer Part Number
LAN9221i
Description
High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O
Manufacturer
SMSC [SMSC Corporation]
Datasheet
1.LAN9221I.pdf
(151 pages)
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Revision 2.6 (12-04-08)
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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DATASHEET
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42
High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O
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CSL
SMSC LAN9221/LAN9221i
t
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