LAN9500 Datasheet, PDF (16/213 Pages) SMSC Corporation – USB 2.0 to 10/100 Ethernet Controller Promiscuous mode

LAN950x
TABLE 3-2: EEPROM PINS
Num Pins
Name
Symbol
Buffer
Type
Description
1
EEPROM Data
In
EEDI
IS
(PD)
This pin is driven by the EEDO output of the
external EEPROM.
EEPROM Data
Out
EEDO
O8
(PU)
This pin drives the EEDI input of the external
EEPROM.
Auto-MDIX AUTOMDIX_EN
IS
Determines the default Auto-MDIX setting.
Enable
Configuration
1
Strap
(PU)
0 = Auto-MDIX is disabled.
1 = Auto-MDIX is enabled.
See Note 3-2 for more information on configuration
straps.
EEPROM Chip
Select
EECS
1
O8 This pin drives the chip select output of the
external EEPROM.
Note:
The EECS output may tri-state briefly
during power-up. Some EEPROM
devices may be prone to false selection
during this time. When an EEPROM is
used, an external pull-down resistor is
recommended on this signal to prevent
false selection. Refer to your EEPROM
manufacturer’s data sheet for additional
information.
EEPROM
Clock
EECLK
O8
(PD)
This pin drives the EEPROM clock of the external
EEPROM.
Power Select PWR_SEL
Configuration
1
Strap
IS
(PD)
Determines the default power setting when no
EEPROM is present. This strap is overridden by
the EEPROM.
0 = The device is bus powered.
1 = The device is self powered.
See Note 3-2 for more information on configuration
straps.
Note 3-2
Configuration strap values are latched on Power-On Reset (POR) or External Chip Reset (nRESET).
Configuration straps are identified by an underlined symbol name. Pins that function as configuration
straps must be augmented with an external resistor when connected to a load. Refer to Section 5.14,
"Configuration Straps," on page 110 for additional information.
DS00001875A-page 16
 2010 - 2015 Microchip Technology Inc.