LAN9500AI datasheet(138/213 Pages) MICROCHIP

138 / 213 page

LAN950x

DS00001875A-page 138

 2010 - 2015 Microchip Technology Inc.

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

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

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

LAN9500AI 데이터시트(PDF) 138 Page - Microchip Technology