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LAN9220 데이터시트(PDF) 33 Page - Microchip Technology

부품명 LAN9220
상세설명  16-bit Non-PCI Small Form Factor 10/100 Ethernet Controller with Variable Voltage I/O & HP Auto-MDIX Support
PDF  142 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN9220 데이터시트(HTML) 33 Page - Microchip Technology

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DS00002417A-page 33
LAN9220
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.
READ (Read Location): This command will cause a read of the EEPROM location pointed to by EPC Address
(EPC_ADDR). The result of the read is available in the E2P_DATA register.
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 3-14:
EEPROM EWEN CYCLE
FIGURE 3-15:
EEPROM READ CYCLE
0
EECLK
EEDIO (INPUT)
EEDIO (OUTPUT)
EECS
10
11
t
CSL
1
10
A6
EECS
EECLK
EEDIO (OUTPUT)
A0
D7
D0
EEDIO (INPUT)
t
CSL



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