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LAN89218 Datasheet(PDF) 37 Page - Microchip Technology

Part # LAN89218
Description  High-Performance Single-Chip 10/100 Ethernet Controller for Automotive Applications
PDF  148 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN89218 Datasheet(HTML) 37 Page - Microchip Technology

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 2008-2015 Microchip Technology Inc.
DS60001255B-page 37
LAN89218
EWDS (Erase/Write Disable): After issued, the EEPROM will ignore erase and write commands. To re-enable erase/
write operations issue the EWEN command.
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.
FIGURE 3-14:
EEPROM EWDS CYCLE
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 3-15:
EEPROM EWEN CYCLE
0
EECLK
EEDIO (INPUT)
EEDIO (OUTPUT)
EECS
10
00
t
CSL
0
EECLK
EEDIO (INPUT)
EEDIO (OUTPUT)
EECS
10
11
t
CSL



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