Advantech MIC-3723 Spécifications télécharger pdf (Page 2)

Features

7-2

CompactPCI Systems

100.00mm

233.35mm

160.00mm

Advantech CompactPCI

Introduction

Engineers have been trying to apply high-performance, low-cost PC technologies to

critical applications such as telecommunications and industrial automation for quite some

time. Unfortunately, the characteristics of desktop PC technologies do not readily lend

themselves to critical applications where high serviceability, vibration & shock resistance,

and good ventilation are required. CompactPCI

may be the answer.

What is CompactPCI

CompactPCI is a small, rugged, high-performance industrial computer architecture based

on the standard PCI bus speciﬁcation. It was developed by the PCI Industrial Computers

Manufacturers Group (PICMG) in late 1994, and is ideal for embedded applications.

Three important technologies form the core of CompactPCI: PCI local bus, Eurocard

mechanics, and airtight pin-and-socket connectors.

PCI Local Bus

PCI stands for Peripheral Component Interconnect. It was published by Intel

1992, and soon became popular in commercial PC designs. It is a high-performance,

processor-independent data bus, and most importantly, it is very inexpensive. The PCI

local bus speciﬁcation deﬁnes two data widths: 32-bit and 64-bit operating at a speeds

up to 66 MHz. This provides theoretical throughput up to 264 MB/s at 32-bit or 528

MB/s at 64-bit. Most computer systems and operating systems support the PCI bus.

For example, Pentium

, Alpha, PowerPC

, Windows

, Unix, and MacOS

. Because

PCI components are manufactured in large quantities, they are inexpensive and readily

available. With these advantages, the PCI bus is very suitable for high speed computing

and high speed data communication applications.

Eurocard Mechanics

Eurocard is an industrial-grade packaging standard popularized by VMEbus. CompactPCI

allows the use of 3U and 6U Eurocards. The dimensions of a 3U CompactPCI board

are 160 mm deep x 100 mm high, while the dimensions of a 6U CompactPCI board

are 160 mm deep x 233.35 mm high. The front panels of CompactPCI boards are IEEE

1101.1 and IEEE 1101.10 compliant, and may include optional EMC gaskets to minimize

electromagnetic interference. Typically, the front panel contains I/O connectors, LED

indicators, and switches. CompactPCI also supports rear panel I/O, which is compliant

with IEEE 1101.11. Rear panel I/O is popular for telecommunication equipment because

of its easy-to-maintain characteristics. If all the wiring is done on rear transition boards

(passive boards), the front CompactPCI boards (active boards), which may require

maintenance, are “clean” without any connected wiring. The front CompactPCI boards

can then simply be replaced without the need for rewiring.

Airtight Pin-and-Socket Connectors

CompactPCI uses airtight, high-density pin-and-socket connectors as speciﬁed in the IEC-

1076 international standard. These 2 mm “hard metric” connectors have low inductance

and controlled impedance, which reduce signal reﬂections caused by the high speed PCI

bus. They enable CompactPCI systems to have up to eight slots in one bus segment.

 Commercial standard PCI chips provide high performance at a low price

 Up to eight slots in one bus segment. Expandable using PCI-to-PCI bridge

chips

 Eurocard form factor

 Airtight, high density, 2 mm pin-and-socket connectors

 Front loading and removal

 Vertical card orientation for better cooling

 Staged power pins for hot-swap capability

 Excellent shock and vibration characteristics

Eurocard Form Factor

The CompactPCI speciﬁcation deﬁnes ﬁve connectors, designated as J1 through J5. The

3U CompactPCI board has two connectors labeled J1 and J2, while the 6U CompactPCI

board has ﬁve connectors labeled J1 through J5. J1 and J2 are deﬁned identically on

both 3U and 6U CompactPCI boards, so 3U and 6U CompactPCI boards are electrically

interchangeable.

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

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