LAN9220_12 Datasheet, PDF (42/151 Pages) SMSC Corporation – 16-bit Non-PCI Small Form Factor 10/100 Ethernet Controller with Variable Voltage I/O & HP Auto-MDIX Support

16-bit Non-PCI Small Form Factor 10/100 Ethernet Controller with Variable Voltage I/O & HP Auto-MDIX Support
Datasheet
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.
EECS
EECLK
EEDIO (OUTPUT)
EEDIO (INPUT)
1
1
0
A6
A0
D7
t_CSL
D0
Figure 3.15 EEPROM READ Cycle
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.
EECS
EECLK
EEDIO (OUTPUT)
EEDIO (INPUT)
t_CSL
1
0
1
A6
A0
D7
D0
Figure 3.16 EEPROM WRITE Cycle
WRAL (Write All): If erase/write operations are enabled in the EEPROM, this command will cause the
contents of the E2P_DATA register to be written to every EEPROM memory location. The EPC_TO bit
is set if the EEPROM does not respond within 30ms.
EECS
EECLK
EEDIO (OUTPUT)
EEDIO (INPUT)
t_CSL
1
0
0
0
1
D7
D0
Figure 3.17 EEPROM WRAL Cycle
Revision 2.9 (03-01-12)
42
DATASHEET
SMSC LAN9220