Power Domain Vs Voltage Domain

Power domains as free models of theories of non determinism.

Power domain vs voltage domain.

Regardless of how you want to think about cpf and upf 1 0 power domains make sure you know that they are not exactly the same. Each voltage domain has a separate library associated with it. 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. Voltage domain means you have a multiple voltage different values to supply the digital core you need level translators between domains.

Luke lang is senior product engineering manager at cadence. Next the supply port and nets are created for the power domain. The upf command create power domain is for this. 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.

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. Power domain is an area having a specified voltage. Domain theorists have come to understand power domains abstractly as free models for theories of non determinism.

Separate power grids are created for the two domains. Two power domains are created on the chip namely the gated power domain and the continuous clock domain. You could mix both techniques. Because of this huge power loss it is not practical to design a soc with single voltage domain at high frequency.

How i can assign two separate power domains to different voltage sites in an ip block and later assign them their respective primary power nets and avoiding any problem like the above which doesnt let the tool to add the necessary level shifter cells in pd levelshift for upscaling the signals coming from 0 90v part. Power domains means power on off required isolator cell. Voltage domains do not have the same voltage values so required level shifters. All the power domains must be part of a top level power domain.

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. 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. Each power domain needs to have a default supply net. In the diagram three power domains are shown a b and c.