Intel Pentium 4 Processor CK00 Clock Synthesizer/Driver Design Guidelines

CK00 Clock Synthesizer/Driver Design Guidelines
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IBIS Reference
The IBIS Open Forum is an industry-wide forum that controls the official IBIS specification.
Minutes of IBIS meetings, email correspondence, proposals for specification changes, etc. are
online at “vhdl.org”. To join in the email discussions , send a message to “ibis-
[e-mail]” and request that your name be added to the IBIS mail reflector. Be sure to
include your email address.
The IBIS home page can be found at http://www.eia.org/eig/ibis/ibis.htm
Audio Codec 98 Reference
The AC97 home page can be found at http://www.intel.com/pc-supp/platform/aud98
AGP Reference
AGP information can be found at http://developer.intel.com/solutions/tech/agp.htm
Intel Clock Reference
Intel CK98 definition is available at
http://developer.intel.com/design/pentiumiii/designgd/245338.htm
Rambus* Information
Information on Rambus memory technology and associated clocking architectures can be
found at http://www.rambus.com
1.3 Drive Specification
The differential host clock driver output buffers are current-mode outputs and are specified by
the ability to provide a determined current over a specified accuracy over a specified range of
loads. The buffers are also specified as to the output di/dt which is critical in determining
system rise and fall (Trise/Tfall) times.
The single-ended clock driver output buffers are specified in terms of the AC switching
characteristics and their DC drive characteristics. The primary electrical parameters are the
voltage to current relationship (V/I), and rise and fall time (Trise/Tfall) of the driver through its
active switching range.