lan9311 Standard Microsystems Corp., lan9311 Datasheet - Page 29

• Manufacturer Part Number: lan9311
• Description: Lan9311/lan9311i Two Port 10/100 Managed Ethernet Switch With 16-bit Non-pci Cpu Interface
• Manufacturer: Standard Microsystems Corp.

Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9311/LAN9311i
114,117
83-86
PIN
127
126
124
123
PIN
119
Note 3.1
Note 3.2
Analog Power
+3.3V Port 1
Ethernet RX
Ethernet RX
Purpose I/O
Ethernet TX
Ethernet TX
Port 2 LED
Reference
Indicators
Negative
Negative
General
Positive
Positive
Supply
NAME
NAME
Port 2
Port 2
Port 2
Port 2
Data
Bias
The pin names for the twisted pair pins apply to a normal connection. If HP Auto-MDIX is
enabled and a reverse connection is detected or manually selected, the RX and TX pins
will be swapped internally.
The pin names for the twisted pair pins apply to a normal connection. If HP Auto-MDIX is
enabled and a reverse connection is detected or manually selected, the RX and TX pins
will be swapped internally.
Table 3.3 LAN Port 1 & 2 Power and Common Pins
nP2LED[3:0]
GPIO[7:4]
VDD33A1
SYMBOL
SYMBOL
EXRES
RXN2
TXN2
TXP2
RXP2
Table 3.2 LAN Port 2 Pins
DATASHEET
BUFFER
BUFFER
IS/O12/
TYPE
OD12
OD12
TYPE
(PU)
AIO
AIO
AIO
AIO
AI
P
29
LED indicators: When configured as LED outputs
via the
these pins are open-drain, active low outputs and
the pull-ups and input buffers are disabled. The
functionality of each pin is determined via the
LED_CFG[9:8] bits.
General Purpose I/O Data: When configured as
GPIO via the
(LED_CFG), these general purpose signals are
fully programmable as either push-pull outputs,
open-drain outputs or Schmitt-triggered inputs by
writing the
Register (GPIO_CFG)
Data & Direction Register
pull-ups are enabled in GPIO mode. The input
buffers are disabled when set as an output.
Note:
Ethernet TX Negative: Negative output of Port 2
Ethernet transmitter. See
information.
Ethernet TX Positive: Positive output of Port 2
Ethernet transmitter. See
information.
Ethernet RX Negative: Negative input of Port 2
Ethernet receiver. See
information.
Ethernet RX Positive: Positive input of Port 2
Ethernet receiver. See
information.
Bias Reference: Used for internal bias circuits.
Connect to an external 12.4K ohm, 1% resistor to
ground.
+3.3V Port 1 Analog Power Supply
Refer to the LAN9311/LAN9311i application note
for additional connection information.
LED Configuration Register
See
on page 163
General Purpose I/O Configuration
Chapter 13, "GPIO/LED Controller,"
LED Configuration Register
DESCRIPTION
DESCRIPTION
for additional details.
and
Note 3.2
Note 3.2
Note 3.2
Note 3.2
(GPIO_DATA_DIR). The
General Purpose I/O
Revision 1.2 (04-08-08)
for additional
for additional
for additional
for additional
(LED_CFG),