LAN9730 Datasheet, PDF (92/222 Pages) SMSC Corporation – High-Speed Inter-Chip (HSIC) USB 2.0

LAN9730/LAN9730i
EWDS (Erase/Write Disable): After issued, the EEPROM will ignore erase and write commands. To re-enable erase/
write operations issue the EWEN command.
FIGURE 4-23:
EEPROM EWDS CYCLE
tCSL
EECS
EECLK
EEDIO (OUTPUT)
1
0
0
0
0
EEDIO (INPUT)
EWDS CYCLE
EWEN (Erase/Write Enable): Enables the EEPROM for erase and write operations. The EEPROM will allow erase and
write operations until the “Erase/Write Disable” command is sent, or until power is cycled.
Note: The EEPROM device will power-up in the erase/write-disabled state. Any erase or write operations will fail
until an Erase/Write Enable command is issued.
FIGURE 4-24:
EEPROM EWEN CYCLE
tCSL
EECS
EECLK
EEDIO (OUTPUT)
1
0
0
1
1
EEDIO (INPUT)
EWEN CYCLE
DS00001946A-page 92
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