LAN8710 Datasheet, PDF(14/79 Page) SMSC Corporation – MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR Technology in a Small Footprint

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LAN8710 Datasheet, PDF (14/79 Pages) SMSC Corporation – MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR Technology in a Small Footprint

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MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWRÂ® Technology in a Small Footprint

Datasheet

Chapter 3 Pin Description

This chapter describes the signals on each pin. When a lower case ânâ is used at the beginning of the

signal name, it indicates that the signal is active low. For example, nRST indicates that the reset signal

is active low. The buffer type for each signal is indicated in the TYPE column, and a description of the

buffer types is provided in Table 3.1.

Table 3.1 Buffer Types

BUFFER TYPE

IOD8

IPU

Note 3.1

IPD

Note 3.1

IOPU

Note 3.1

IOPD

Note 3.1

AIO

ICLK

OCLK

DESCRIPTION

Input.

Output with 8mA sink and 8mA source.

Input/Open-drain output with 8mA sink.

Input with 67k (typical) internal pull-up.

Input with 67k (typical) internal pull-down.

Input/Output with 67k (typical) internal pull-up. Output has 8mA sink and 8mA source.

Input/Output with 67k (typical) internal pull-down. Output has 8mA sink and 8mA source.

Analog input

Analog bi-directional

Crystal oscillator input pin

Crystal oscillator output pin

Power pin

Note 3.1

Unless otherwise noted in the pin description, internal pull-up and pull-down resistors are

always enabled. The internal pull-up and pull-down resistors prevent unconnected inputs

from floating, and must not be relied upon to drive signals external to LAN8710/LAN8710i.

When connected to a load that must be pulled high or low, an external resistor must be

added.

Note: The digital signals are not 5V tolerant.They are variable voltage from +1.6V to +3.6V, as shown

in Table 7.1.

3.1

MAC Interface Signals

Table 3.2 MII/RMII Signals 32-QFN

SIGNAL

NAME

TXD0

TXD1

32-QFN

PIN # TYPE

DESCRIPTION

I8 Transmit Data 0: The MAC transmits data to the transceiver using this

signal in all modes.

I8 Transmit Data 1: The MAC transmits data to the transceiver using this

signal in all modes

Revision 1.0 (04-15-09)

DATASHEET

SMSC LAN8710/LAN8710i

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