Power Domain Vs Voltage Domain

Power domains means power on off required isolator cell.

Power domain vs voltage domain.

Just as the finite powerset construction is the free semilattice the powerdomain constructions should be understood abstractly as free models of theories of non determinism. Each voltage domain has a separate library associated with it. An increasingly common technique to reduce dynamic power is the use of multiple voltage islands domains which allows some blocks to use lower supply voltages than others or to be completely. Domain theorists have come to understand power domains abstractly as free models for theories of non determinism.

In the diagram three power domains are shown a b and c. Two power domains are created on the chip namely the gated power domain and the continuous clock domain. Luke lang is senior product engineering manager at cadence. Power domain is an area having a specified voltage.

Voltage domain means you have a multiple voltage different values to supply the digital core you need level translators between domains. And all mix between voltage power domains are allow for lof ot fun. Next the supply port and nets are created for the power domain. Each power domain needs to have a default supply net.

For those that are used to upf 1 0 power domain it would be much easier to think of cpf power domain as voltage island. A snippet of the upf script for these steps are. Power domain means you could switch off on the domain you need isolators element between domains. In normal functioning the grids are shorted at a number of points to ensure that current flows between the two domains and voltage differences are minimal.

The upf command create power domain is for this. Because of this huge power loss it is not practical to design a soc with single voltage domain at high frequency. All the power domains must be part of a top level power domain. To reduce the power consumption design was divided into multiple voltage or power domains each with its own supply voltage and this type of approach is called multi voltage design.

For placement and optimization in a top down situation where the design is being implemented as a whole a tool needs to understand that power domain boundaries must be honored. Separate power grids are created for the two domains. Power domains as free models of theories of non determinism. You could mix both techniques.