Intel 31154 manual EMI Considerations, PCB Ground Layout Around Connectors

Routing Guidelines

Figure 7. PCB Ground Layout Around Connectors

Connector

Connector Pins

GND PCB Layer

A. Incorrect method B. Correct method

A9260-01

6.2EMI Considerations

It is highly recommended that you follow good EMI design practices when designing with the 31154:

•To minimize EMI on your PCB, a useful technique is not to extend the power planes to the edge of the board.

•Another technique is to surround the perimeter of your PCB layers with a GND trace. This helps to shield the PCB with grounds, minimizing radiation.

The AP-711 EMI Design Techniques Application Note discusses how to identify and prevent many common EMI problems at the design stage. Although the document addresses a range of solutions, emphasis is on printed circuit board design methods. This document is available at the following link:

http://developer.intel.com/design/auto/mcs96/applnots/272673.htm

Intel® 31154 133 MHz PCI Bridge Design Guide Design Guide 37