LAN9115_05 Datasheet, PDF (16/131 Pages) SMSC Corporation – Highly Efficient Single- Chip 10/100 Non-PCI Ethernet Controller

Highly Efficient Single-Chip 10/100 Non-PCI Ethernet Controller
Datasheet
Table 2.3 LAN Interface Signals
PIN
BUFFER
NUM
NO.
NAME
SYMBOL
TYPE
PINS
DESCRIPTION
79
TXP
TPO+
AO
1
Twisted Pair Transmit Output,
Positive
78
TXN
TPO-
AO
1
Twisted Pair Transmit Output,
Negative
83
RXP
TPI+
AI
1
Twisted Pair Receive Input, Positive
82
RXN
TPI-
AI
1
Twisted Pair Receive Input, Negative
87
PHY External Bias
EXRES1
AI
Resistor
1
Must be connected to ground through
a 12.4K ohm 1% resistor.
Table 2.4 Serial EEPROM Interface Signals
PIN
NO.
NAME
SYMBOL
BUFFER
TYPE
NUM
PINS
DESCRIPTION
67
EEPROM Data,
EEDIO/GPO3/
I/O8
GPO3, TX_EN, TX_EN/TX_CLK
TX_CLK
1
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.
68
EEPROM Chip
nEECS
O8
Select
69
EEPROM Clock, EECLK/GPO4/
O8
GPO4 RX_DV, RX_DV/RX_CLK
RX_CLK
1
Serial EEPROM chip select.
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.
Revision 1.1 (05-17-05)
16
DATASHEET
SMSC LAN9115