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Information processing system, electronic device and control method

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Article having heating elements comprising conductive polymers capable of dimensional change

I have now discovered that if a laminar conductive polymer member is sandwiched between a pair of ...

Optical fiber connectors

What is claimed is: 1. Connector for two optical fibers comprising at least one body composed of a ...

Register with selective wait feature

Details

Inventors: Langan, John A.; Amedeo, Robert J.; Thomas, Nancy L.;
Assignee: Motorola, Inc. (Schaumburg, IL)
Primary Examiner: Heckler; Thomas M.
Assistant Examiner:
Attorney, Agent or Firm: Meyer; Jonathan P.

A register having a selective wait feature includes logic for receiving a new value to be stored and logic for selectively delaying the appearance of the new value at the output of the register until some predetermined event has occurred. The register can also be read to determine whether the event has occurred. The register is disclosed in the context of a microprocessor-controlled digital timer apparatus which responds to an incoming pulse train. Certain control bits in the apparatus determine whether the digital timer is responsive to rising edges of the pulse train, falling edges, any edges, or no edges. The microprocessor determines, at the time new values are stored to those control bit locations, whether the new values are to become effective immediately or are to be delayed until some intervening event has occurred. The register permits control over the time at which transitions between different operating modes are made in order to assure orderly operation.

DETAILED DESCRIPTION These and other requirements are provided by the present invention.
In one embodiment, the present invention provides a data processing system including: a central processing unit for executing instructions; a register under control of the central processing unit for storing a data value and for providing an output signal; wait control logic under control of the central processing unit for determining, at a time at which the central processing unit causes the register to store a particular data value, whether the output signal provided by the register shall immediately represent the particular data value or shall represent the particular data value only at a later time.

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