Power Domain Voltage Domain

Hence the upf power domain is a collection of instances that are treated as a group for power management purposes.

Power domain voltage domain.

In upf 1 0 power domain refers to a logical hierarchy in the design. In denotational semantics and domain theory power domains are domains of nondeterministic and concurrent computations. This definition is based on electrical connection. Level shifters must ensure the proper drive strength and accurate timing as signals transition from one voltage level to another.

Therefore isolation cells are necessary to isolate floating inputs. For power domains which share the same operating voltage but some of them may be shut off an isolation cell is required on power domain interface. In the diagram three power domains are shown a b and c. The terms voltage island and power island mean exactly the same thing.

Two power domains are created on the chip namely the gated power domain and the continuous clock domain. Each voltage domain has a separate library associated with it. Power domains are the fundamental parts of upf constructions. Separate power grids are created for the two domains.

Because of this huge power loss it is not practical to design a soc with single voltage domain at high frequency. 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 present disclosure relates system and method for automatic assignment of power domain and voltage domain to one or more soc and or noc elements based on one or a combination of noc and or soc. A power domain is a collection of design blocks or instances that share the same supply voltage.

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. The reason for this is that cells connected to power off blocks their inputs become floating which may cause high leakage power. All other predominant factors that are used to completely define the upf are established around the power domain boundaries.