AR8031-AL1B データシートの表示（PDF） - Unspecified

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AR8031-AL1B

AR8031 Integrated 10/100/1000 Mbps Ethernet Transceiver

Unspecified 

1. Pin Descriptions

This section contains a package pinout for the

AR8031 QFN 48 pin and a listing of the signal

descriptions (see Figure 1-1).

The following nomenclature is used for signal

names:

NC

No connection to the internal die

is made from this pin

n

At the end of the signal name,

indicates active low signals

P

At the end of the signal name,

indicates the positive side of a dif-

ferential signal

N

At the end of the signal name

indicates the negative side of a

differential signal

The following nomenclature is used for signal

types described in Table 1-1:

D

Open drain

IA

Analog input signal

I

Digital input signal

IH

Input signals with weak internal

pull-up, to prevent signals from

floating when left open

IL

Input signals with weak internal

pull-down, to prevent signals

from floating when left open

I/O

A digital bidirectional signal

OA

An analog output signal

O

A digital output signal

P

A power or ground signal

PD

Internal pull-down for input

PU

Internal pull-up for input

Atheros Communications, Inc.

COMPANY CONFIDENTIAL

AR8031 Integrated 10/100/1000 Mbps Ethernet Transceiver • 9

August 2011 • 9

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