glossary

Explore our glossary of terms related to our target markets , applications and technologies

B

Backpressure

A condition where a channel is unable to accept new data, usually because its buffer is full.

Bridge

A module that connects a host to the network.

C

Channel

A set of wires that carry a particular type of data.

Channel Dependency Graph

A directed graph of all the dependencies in the network. A network is said to be deadlock free if its CDG is acyclic.

Clock Domain

A set of components that share the same clock source.

Component

A module that is part of the NoC. Usually a router or bridge, but sometimes an in-link module.

CSR

Configuration and Status Register

D

Deadlock

A condition where backpressure has propagated in a cycle, becoming self-sustaining.

Domain Crosser

A module that adapts between two clock domains.

F

Flit

A unit of data that is sent through the network. Short for Flow Control Unit.

Flow

The unit of mapping of traffic to the network. A flow is the set of all possible flits that are sent from one source to one destination.

H

Hop

One or more links that form a connection between a router/bridge and another router/bridge.

Host

A module that connects to the network through a bridge.

I

Interface

A set of channels that are used together to send and receive data.

K

KPI

Key Performance Indicator. A measurable metric used to evaluate the success, efficiency, or quality of the design process, performance, or output.

L

N

NoC

Network-on-Chip. A router-based packet switching network between SoC modules.

P

Packet

A set of flits that are sent together from one source to one destination. Packets are required to be transmitted non-interleaved and will be delivered non-interleaved.

Q

QoS

Quality-of-Service. It refers to the performance level and reliability of a system, network, or service, measured by specific metrics to ensure it meets user or application requirements.

R

RAS

Reliability, Availability, and Serviceability in data centers refers to a set of design principles and metrics ensuring systems operate reliably, remain available for use, and are easy to maintain or repair.

Router

A module that routes flits from input ports to output ports.

S

SoC

System-on-Chip. A chip that integrates an entire system onto it.

T

Transport

The functionality provided by the routers within a NoC: getting packets from one place to another.

V

Virtual Channel

A logical channel that allows a single physical channel to have independent backpressure for different packets.

VPS

Virtualized Packet Streaming, a transport protocol

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