5 ewen (erase/write enable), Figure 10.10 eeprom ewen cycle, 6 read (read location) – SMSC LAN9312 User Manual
Page 147: Figure 10.11 eeprom read cycle, Ewen (erase/write enable), Read (read location), Datasheet
High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9312
147
Revision 1.4 (08-19-08)
DATASHEET
10.2.3.5
EWEN (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.
10.2.3.6
READ (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
.
Figure 10.10 EEPROM EWEN Cycle
Figure 10.11 EEPROM READ Cycle
0
1
0
1
1
EECLK
EEDI
EEDO
EECS
1
1
0
Ax
A0
D7
D0
EECLK
EEDI
EEDO
EECS