LAN9116 Datasheet, PDF (26/109 Pages) SMSC Corporation – Highly Efficient Single-Chip 10/100 Non-PCI Ethernet Controller

LAN9116
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.
FIGURE 3-7:
EEPROM EWEN CYCLE
t_CSL
EECS
EECLK
EEDIO (OUTPUT)
1
0
0
1
1
EEDIO (INPUT)
READ (Read Location): This command will cause a read of the EEPROM location pointed to by EPC Address
(EPC_ADDR). The result of the read is available in the E2P_DATA register.
FIGURE 3-8:
EEPROM READ CYCLE
EECS
EECLK
EEDIO (OUTPUT)
EEDIO (INPUT)
1
1
0
A6
A0
D7
t_CSL
D0
DS00002268A-page 26
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