SMSC LAN9312 - Manual (Page 148)

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
Revision 1.4 (08-19-08) 148 SMSC LAN9312
DATASHEET
10.2.3.7 WRITE (Write Location)
If erase/write operations are enabled in the EEPROM, this command will cause the contents of the
EEPROM Data Register (E2P_DATA) to be written to the EEPROM location pointed to by the
EPC_ADDRESS field of the EEPROM Command Register (E2P_CMD) . The EPC_TIMEOUT bit of the
EEPROM Command Register (E2P_CMD) is set if the EEPROM does not respond within 30mS.
10.2.3.8 WRAL (Write All)
If erase/write operations are enabled in the EEPROM, this command will cause the contents of the
EEPROM Data Register (E2P_DATA) to be written to every EEPROM memory location. The
EPC_TIMEOUT bit of the EEPROM Command Register (E2P_CMD) is set if the EEPROM does not
respond within 30mS.
Figure 10.12 EEPROM WRITE Cycle
Figure 10.13 EEPROM WRAL Cycle
0 1 1 Ax A0 D7 D0
EECLK
EEDI
EEDO
EECS
0 1 D7 D0 0 0 1
EECLK
EEDI
EEDO
EECS