SMSC LAN9420 - Manual (Page 34)

Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface
Datasheet
Revision 1.22 (09-25-08) 34 SMSC LAN9420/LAN9420i
DATASHEET
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_TO bit is set if the EEPROM does not respond within
30ms.
Figure 3.8 EEPROM ERASE Cycle
Figure 3.9 EEPROM ERAL Cycle
1
EECLK
EEDIO (INPUT)
EEDIO (OUTPUT)
EECS
1 1 A6 A0
t
CSL
0
EECLK
EEDIO (INPUT)
EEDIO (OUTPUT)
EECS
1 0 1 0
t
CSL