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Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9311/LAN9311i 147 Revision 1.4 (08-19-08)
DATASHEET
10.2.3.3 ERAL (Erase All)
If erase/write operations are enabled in the EEPROM, this command will initiate a bulk erase of the
entire EEPROM. The EPC_TIMEOUT bit of the EEPROM Command Register (E2P_CMD) is set if the
EEPROM does not respond within 30mS.
10.2.3.4 EWDS (Erase/Write Disable)
After this command is issued, the EEPROM will ignore erase and write commands. To re-enable
erase/write operations, the EWEN command must be issued.
Figure 10.8 EEPROM ERAL Cycle
Figure 10.9 EEPROM EWDS Cycle
01010
EECLK
EEDI
EEDO
EECS
01000
EECLK
EEDI
EEDO
EECS