LAN9117 Datasheet, PDF (28/114 Pages) SMSC Corporation – HIGH PERFORMANCE SINGLE-CHIP 10/100 NON-PCI ETHERNET CONTROLLER

LAN9117
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
WRITE (Write Location): If erase/write operations are enabled in the EEPROM, this command will cause the contents
of the E2P_DATA register to be written to the EEPROM location selected by the EPC Address field (EPC_ADDR). The
EPC_TO bit is set if the EEPROM does not respond within 30ms.
FIGURE 3-9:
EEPROM WRITE CYCLE
EECS
EECLK
EEDIO (OUTPUT)
EEDIO (INPUT)
1
0
1
A6
A0
D7
t_CSL
D0
DS00002267A-page 28
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