LAN9312-NU Standard Microsystems (SMSC), LAN9312-NU Datasheet - Page 28

• Manufacturer Part Number: LAN9312-NU
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LAN9312-NU

• Number Of Primary Switch Ports: 2
• Operating Supply Voltage (typ): 3.3V
• Fiber Support: No
• Phy/transceiver Interface: MII
• Power Supply Type: Analog
• Data Rate (typ): 10/100Mbps
• Vlan Support: Yes
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Pin Count: 128
• Mounting: Surface Mount
• Jtag Support: No
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 3V
• Operating Temperature Classification: Commercial
• Data Rate: 100Mbps
• Lead Free Status / RoHS Status: Compliant

Revision 1.7 (06-29-10)
3.2
89-92
PIN
110
115
116
111
This section contains the descriptions of the LAN9312 pins. The pin descriptions have been broken
into functional groups as follows:
Note: A list of buffer type definitions is provided in
Pin Descriptions
Ethernet RX
Ethernet RX
Purpose I/O
Ethernet TX
Ethernet TX
Port 1 LED
LAN Port 1 Pins
LAN Port 2 Pins
LAN Port 1 & 2 Power and Common Pins
Host Bus Interface Pins
EEPROM Pins
Dedicated Configuration Strap Pins
Miscellaneous Pins
PLL Pins
Core and I/O Power and Ground Pins
No-Connect Pins
Indicators
Negative
Negative
General
Positive
Positive
NAME
Port 1
Port 1
Port 1
Port 1
Data
nP1LED[3:0]
GPIO[3:0]
SYMBOL
TXN1
RXN1
RXP1
TXP1
High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Table 3.1 LAN Port 1 Pins
DATASHEET
BUFFER
IS/O12/
TYPE
OD12
OD12
(PU)
AIO
AIO
AIO
AIO
28
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 1
Ethernet transmitter. See
information.
Ethernet TX Positive: Positive output of Port 1
Ethernet transmitter. See
information.
Ethernet RX Negative: Negative input of Port 1
Ethernet receiver. See
information.
Ethernet RX Positive: Positive input of Port 1
Ethernet receiver. See
information.
Section 1.2, "Buffer Types," on page
LED Configuration Register
See
on page 162
General Purpose I/O Configuration
LED Configuration Register
Chapter 13, "GPIO/LED Controller,"
DESCRIPTION
for additional details.
and
Note 3.1
Note 3.1
Note 3.1
Note 3.1
(GPIO_DATA_DIR). The
General Purpose I/O
for additional
for additional
for additional
for additional
(LED_CFG),
SMSC LAN9312
18.
Datasheet