LAN9211_12 Datasheet, PDF (16/147 Pages) SMSC Corporation – High-Performance Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX Support

High-Performance Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX Support
Datasheet
NAME
EEPROM Data,
GPO3, TX_EN,
TX_CLK
EEPROM Chip
Select
EEPROM Clock,
GPO4 RX_DV,
RX_CLK
Table 2.3 Serial EEPROM Interface Signals
SYMBOL
BUFFER
TYPE
EEDIO/GPO3/
I/O8
TX_EN/TX_CLK
EECS
O8
NUM
PINS
1
1
DESCRIPTION
EEPROM Data: This bi-directional pin can be
connected to a serial EEPROM DIO. This is
optional.
General Purpose Output 3: This pin can also
function as a general purpose output, or it can
be configured to monitor the TX_EN or
TX_CLK signals on the internal MII port. When
configured as a GPO signal, or as a
TX_EN/TX_CLK monitor, the EECS pin is
deasserted so as to never unintentionally
access the serial EEPROM. This signal cannot
function as a general-purpose input.
Serial EEPROM chip select.
EECLK/GPO4/
RX_DV/RX_CLK
O8
(PU)
1
EEPROM Clock: Serial EEPROM Clock pin.
General Purpose Output 4: This pin can also
function as a general-purpose output, or it can
be configured to monitor the RX_DV or
RX_CLK signals on the internal MII port. When
configured as a GPO signal, or as an
RX_DV/RX_CLK monitor, the EECS pin is
deasserted so as to never unintentionally
access the serial EEPROM. This signal cannot
function as a general-purpose input.
Note:
When the EEPROM interface is not
used, the EECLK pin must be left
unconnected.
Note:
This pin must not be pulled low by an
external resistor or driven low
externally under any conditions.
Revision 2.9 (03-01-12)
16
DATASHEET
SMSC LAN9211