Browse Definitions :
Definition

serial peripheral interface (SPI)

In a computer, a serial peripheral interface (SPI) is an interface that enables the serial (one bit at a time) exchange of data between two devices, one called a master and the other called a slave . An SPI operates in full duplex mode. This means that data can be transferred in both directions at the same time. The SPI is most often employed in systems for communication between the central processing unit ( CPU ) and peripheral devices. It is also possible to connect two microprocessors by means of SPI. The term was originally coined by Motorola. National Semiconductor has an equivalent interface called Microwire.

Serial interfaces have certain advantages over parallel interfaces. The most significant advantage is simpler wiring. In addition, serial interface cables can be longer than parallel interface cables, because there is much less interaction (crosstalk) among the conductors in the cable.

Many types of devices can be controlled by an SPI, including shift registers, memory chips, port expanders, display drivers, data converters, printers, data storage devices, sensors, and microprocessors. Data is transferred serially over a cable, input to a shift register, and transferred within each subsystem by means of parallel processing.

This was last updated in March 2011

Continue Reading About serial peripheral interface (SPI)

SearchCompliance
  • risk reporting

    Risk reporting is a method of identifying risks tied to or potentially impacting an organization's business processes.

  • risk avoidance

    Risk avoidance is the elimination of hazards, activities and exposures that can negatively affect an organization and its assets.

  • risk profile

    A risk profile is a quantitative analysis of the types of threats an organization, asset, project or individual faces.

SearchSecurity
SearchHealthIT
SearchDisasterRecovery
  • What is risk mitigation?

    Risk mitigation is a strategy to prepare for and lessen the effects of threats faced by a business.

  • fault-tolerant

    Fault-tolerant technology is a capability of a computer system, electronic system or network to deliver uninterrupted service, ...

  • synchronous replication

    Synchronous replication is the process of copying data over a storage area network, local area network or wide area network so ...

SearchStorage
  • cloud archive

    A cloud archive is storage as a service for long-term data retention.

  • cache

    A cache -- pronounced CASH -- is hardware or software that is used to store something, usually data, temporarily in a computing ...

  • archive

    An archive is a collection of data moved to a repository for long-term retention, to keep separate for compliance reasons or for ...

Close