LAN9420I-NU Standard Microsystems (SMSC), LAN9420I-NU Datasheet - Page 17

• Manufacturer Part Number: LAN9420I-NU
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LAN9420I-NU

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Compliant

Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface
Datasheet
SMSC LAN9420/LAN9420i
NUM
PINS
1
1
1
EEPROM Data
EEPROM Chip
EEPROM
RX_CLK
TX_CLK
RX_DV
TX_EN
NAME
GPO3
Select
GPO4
Clock
Note 2.1
This pin is used for factory testing and is latched on power up. This pin is pulled high
through an internal resistor and must not be pulled low externally. This pin must be
augmented with an external resistor when connected to a load. The value of the resistor
must be such that the pin reaches its valid level before de-assertion of PCInRST following
power up. The “IS” input buffer type is enabled only during power up. The “IS” input buffer
type is disabled at all other times.
SYMBOL
RX_CLK
TX_CLK
RX_DV
TX_EN
EECLK
EEDIO
GPO3
EECS
GPO4
BUFFER
Note 2.1
Table 2.2 EEPROM
TYPE
IS/O8
IS/O8
(PU)
DATASHEET
O8
O8
O8
O8
O8
O8
O8
17
EEPROM Data: This bi-directional pin can be connected
to an optional serial EEPROM DIO.
General Purpose Output 3: This pin can also function
as a general purpose output. The EECS pin is deasserted
so as to never unintentionally access the serial EEPROM.
TX_EN Signal Monitor: This pin can also be configured
to monitor the TX_EN signal on the internal MII port. The
EECS pin is deasserted so as to never unintentionally
access the serial EEPROM.
TX_CLK Signal Monitor: This pin can also be configured
to monitor the TX_CLK signal on the internal MII port.
The EECS pin is deasserted so as to never
unintentionally access the serial EEPROM.
Serial EEPROM Chip Select.
EEPROM Clock: Serial EEPROM Clock pin
General Purpose Output 4: This pin can also function
as a general purpose output. The EECS pin is deasserted
so as to never unintentionally access the serial EEPROM.
RX_DV Signal Monitor: This pin can also be configured
to monitor the RX_DV signal on the internal MII port. The
EECS pin is deasserted so as to never unintentionally
access the serial EEPROM.
RX_CLK Signal Monitor: This pin can also be
configured to monitor the RX_CLK signal on the internal
MII port. The EECS pin is deasserted so as to never
unintentionally access the serial EEPROM.
DESCRIPTION
Revision 1.4 (12-17-08)