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LAN9500AI データシート(PDF) 138 Page - Microchip Technology

部品番号 LAN9500AI
部品情報  LAN950x USB 2.0 to 10/100 Ethernet Controller
PDF  213 Pages
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メーカー  MICROCHIP [Microchip Technology]
ホームページ  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN9500AI データシート(HTML) 138 Page - Microchip Technology

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LAN950x
DS00001875A-page 138
 2010 - 2015 Microchip Technology Inc.
10
EPC Time-out
If an EEPROM operation is performed, and there is no response from the
EEPROM within 30mS, the EEPROM controller will time-out and return to its
idle state. This bit is set when a time-out occurs, indicating that the last
operation was unsuccessful.
Note:
If the EEDI pin is pulled-high (default if left unconnected), EPC
commands will not time out if the EEPROM device is missing. In this
case, the EPC Busy bit will be cleared as soon as the command
sequence is complete. It should also be noted that the ERASE,
ERAL, WRITE and WRAL commands are the only EPC commands
that will time-out if an EEPROM device is not present and the EEDI
signal is pulled low.
R/WC
0
9
Data Loaded
When set, this bit indicates that a valid EEPROM was found, and that the
USB and Ethernet Data programming has completed normally. This bit is set
after a successful load of the data after power-up, or after a RELOAD
command has completed.
R/WC
0
8:0
EPC Address
The 9-bit value in this field is used by the EEPROM Controller to address a
specific memory location in the Serial EEPROM. This is a BYTE aligned
address.
R/W
00h
Bits
Description
Type
Default



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