Methods and arrangements to model an asynchronous interface

a technology of asynchronous interface and model, applied in the field of clock circuits, can solve the problems of circuit failure, skew/jitter logic is employed to model asynchronous, and skew/jitter logic cannot be used for elastic interfaces or other semi-static interfaces,
US20070098020A1Inactive Publication Date: 2007-05-03IBM CORP
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
IBM CORP
Publication Date
2007-05-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

Methods and arrangements to model an asynchronous interface are disclosed. Embodiments include transformations, code, state machines or other logic to generate a skew pattern for a semi-static or time-constrained, asynchronous interface and employ the skew pattern in data transfers during a time interval in which the asynchronous interface. Embodiments may then alter the skew pattern in at the expiration of the time interval. In many embodiments, changes to the skew pattern may be substantially non-deterministic. In other embodiments, changes to the skew pattern may follow a heuristic or other dynamic or pre-determined pattern.
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Description

FIELD OF INVENTION

[0001] The present invention is in the field of clock circuits. More particularly, the present invention relates to methods and arrangements to model behavior of an asynchronous interface. BACKGROUND

[0002] The push for high speed computing has led to the development of high speed, time-constrained, asynchronous links such as IBM's self-timed interfaces (STIs). In fact, the STI has been implemented in IBM's largest servers for several generations, providing successively improved input-output (I / O) subsystem bandwidth capacities. Time-constrained, asynchronous links are asynchronous data interfaces that transmit data over parallel bit lines via independent clock signals that are substantially synchronized at times. In particular, time-constrained, asynchronous interfaces, sometimes referred to as elastic or semi-static interfaces, may guarantee synchronous behavior over a specified time interval to facilitate data transfers.

[0003] For purposes of the data transfer...

Claims

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