LAN9313 Datasheet, PDF (28/398 Pages) SMSC Corporation – Three Port 10/100 Managed Ethernet Switch with MII

Three Port 10/100 Managed Ethernet Switch with MII
Datasheet
3.2
Pin Descriptions
This section contains the descriptions of the LAN9313/LAN9313i pins. The pin descriptions have been
broken into functional groups as follows:
„ LAN Port 1 Pins
„ LAN Port 2 Pins
„ LAN Port 1 & 2 Power and Common Pins
„ LAN Port 0(External MII) Pins
„ Dedicated Configuration Strap Pins
„ EEPROM Pins
„ Serial Management Pins
„ Miscellaneous Pins
„ PLL Pins
„ Core and I/O Power and Ground Pins
„ No-Connect Pins
Note: A list of buffer type definitions is provided in Section 1.2, "Buffer Types," on page 16.
Table 3.1 LAN Port 1 Pins
PIN
89-92
110
111
115
116
NAME
Port 1 LED
Indicators
General
Purpose I/O
Data
Port 1
Ethernet TX
Negative
Port 1
Ethernet TX
Positive
Port 1
Ethernet RX
Negative
Port 1
Ethernet RX
Positive
SYMBOL
nP1LED[3:0]
GPIO[3:0]
TXN1
TXP1
RXN1
RXP1
BUFFER
TYPE
DESCRIPTION
OD12
IS/O12/
OD12
(PU)
AIO
LED Indicators: When configured as LED outputs
via the LED Configuration Register (LED_CFG),
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 Configuration Register
(LED_CFG), these general purpose signals are
fully programmable as either push-pull outputs,
open-drain outputs or Schmitt-triggered inputs by
writing the General Purpose I/O Configuration
Register (GPIO_CFG) and General Purpose I/O
Data & Direction Register (GPIO_DATA_DIR). The
pull-ups are enabled in GPIO mode. The input
buffers are disabled when set as an output.
Note: See Chapter 12, "GPIO/LED Controller,"
on page 142 for additional details.
Ethernet TX Negative: Negative output of Port 1
Ethernet transmitter. See Note 3.1 for additional
information.
AIO Ethernet TX Positive: Positive output of Port 1
Ethernet transmitter. See Note 3.1 for additional
information.
AIO Ethernet RX Negative: Negative input of Port 1
Ethernet receiver. See Note 3.1 for additional
information.
AIO Ethernet RX Positive: Positive input of Port 1
Ethernet receiver. See Note 3.1 for additional
information.
Revision 1.2 (04-08-08)
28
DATASHEET
SMSC LAN9313/LAN9313i