Mobile Intel Pentium 4 Processor - M and Intel 845MP/MZ Chipset Platform Design Guide

Mobile Intel

Pentium

4 Processor-M and Intel

845MP/845MZ Chipset Platform

134 Design Guide

Figure 68. 82562EH Termination

The filter and magnetic component T1, integrates the required filter network, high-voltage impulse

protection, and transformer to support the HomePNA* LAN interface.

One RJ-11 jack (labeled “LINE” in the above figure) allows the node to be connected to the phoneline,

and the second jack (labeled “PHONE” in the above figure) allows other downline devices to be

connected at the same time. This second connector is not required by HomePNA*. However, typical PCI

adapters and PC motherboard implementations are likely to include it for user convenience.

A low-pass filter, setup in-line with the second RJ-11 jack is also recommended by the HomePNA* to

minimize interference between the HomeRun connection and a POTs voice or modem connection on the

second jack. This places a restriction of the type of devices connected to the second jack as the pass-band

of this filter is set approximately at 1.1 MHz. Please refer to the HomePNA* website: www.homepna.org

for up-to-date information and recommendations regarding the use of this low-pass filter to meet

HomePNA* certifications.

9.10.3.6. Critical Dimensions

There are three dimensions to consider during layout. Distance ‘A’ from 82562EH to the magnetic

module, distance ‘B’ from the line RJ11 connector to the magnetic module, and distance ‘C’ from the

phone RJ11 to the LPF (if implemented).