LAN9211 datasheet(16/147 Pages) SMSC

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High-Performance Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX Support

Datasheet

Revision 2.9 (03-01-12)

SMSC LAN9211

DATASHEET

Table 2.3 Serial EEPROM Interface Signals

NAME

SYMBOL

BUFFER

TYPE

NUM

PINS

DESCRIPTION

EEPROM Data,

GPO3, TX_EN,

TX_CLK

EEDIO/GPO3/

TX_EN/TX_CLK

I/O8

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.

EEPROM Chip

Select

EECS

Serial EEPROM chip select.

EEPROM Clock,

GPO4 RX_DV,

RX_CLK

EECLK/GPO4/

RX_DV/RX_CLK

(PU)

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.

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