High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

Datasheet

10.2.3.5EWEN (Erase/Write Enable)

This command enables the EEPROM for erase and write operations. The EEPROM will allow erase and write operations until the EWDS command is sent, or until power is cycled.

Note: The EEPROM will power-up in the erase/write disabled state. Any erase or write operations will fail until an EWEN command is issued.

EECS

EECLK

EEDO

 

 

 

 

 

 

 

 

 

1

0

0

1

1

 

 

 

 

 

EEDI

Figure 10.10 EEPROM EWEN Cycle

10.2.3.6READ (Read Location)

This command will cause a read of the EEPROM location pointed to by the EPC_ADDRESS field of the EEPROM Command Register (E2P_CMD). The result of the read is available in the EEPROM Data Register (E2P_DATA).

EECS

EECLK

EEDO

 

 

 

 

 

 

 

 

 

 

1

1

0

Ax

 

A0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EEDI

 

 

 

 

 

 

 

 

 

D7

 

D0

 

Figure 10.11 EEPROM READ Cycle

SMSC LAN9312

147

Revision 1.4 (08-19-08)

 

DATASHEET