Method for assignment of multiple power supply pins of voltage island

A distribution method and technology of voltage island, applied in electrical digital data processing, CAD circuit design, special data processing applications, etc., can solve the circuit failure of circuit macro-modules, the voltage drop does not meet the design constraints, and affects the voltage drop of power supply network nodes, etc. problem, to achieve the effect of optimizing the voltage drop and reducing the design cost

Active Publication Date: 2016-06-22
NINGBO UNIV
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Problems solved by technology

[0004] The position of the power supply pin directly affects the voltage drop of the power supply network node of the voltage island in the multi-voltage chip. If the distribution is improper, the voltage drop will inevitably fail to meet the design constrain

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  • Method for assignment of multiple power supply pins of voltage island
  • Method for assignment of multiple power supply pins of voltage island
  • Method for assignment of multiple power supply pins of voltage island

Examples

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Example Embodiment

[0030] The present invention will be further described in detail below with reference to the embodiments of the accompanying drawings.

[0031] Take a chip containing three voltage islands as an example, its layout is shown in figure 1 , figure 1 That is, a schematic diagram of the circuit macro-module layout including three voltage islands, which contains 30 circuit macro-modules, namely b 1 , b 2 , b 3 ,...,b 30 , the multi-power supply pin assignment method of its voltage island includes the following steps:

[0032] Step 1: Define the voltage island as an area composed of circuit macro modules that work under the same working voltage and occupy a continuous two-dimensional physical space. The chip is composed of several voltage islands. figure 1 contains three voltage islands, in which the circuit macroblock b 1 ~b 20 A voltage island with a working voltage of 1.0V is formed, and the circuit macro module b 21~b 25 A voltage island with a working voltage of 1.1V is...

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Abstract

The invention discloses a method for assignment of multiple power supply pins of a voltage island. The method comprises the following steps of firstly, adopting a Kmeans assembly algorithm to divide a circuit macroblock included in the voltage island into n clusters based on the coordinate information of the circuit macro-blocks according to the physical information of the voltage island; secondly, carrying out fine tuning on ownership of the circuit micro-blocks in all clusters in order to enable the power density of each cluster to be approximately equal; and lastly, assigning different stiffness coefficients to springs connected to the circuit micro-blocks according to the current density, determining the position of an energy balance point of a spring system and completing assignment of the power supply pins of the circuit micro-blocks included in each cluster, and repeating the process to complete assignment of multiple power supply pins required by all voltage islands. According to the method, the voltage drop of nodes of a power network of the voltage island on a chip can be quickly and effectively optimized, so that the an automatic design optimization method for assignment of the power supply pins of the voltage island on the chip is enriched, and the design cost is reduced. Through example verification, the voltage drop of the power network, which is obtained by the method, can be effectively reduced.

Description

technical field [0001] The invention relates to an automatic design method of an on-chip system, in particular to a method for allocating multiple power supply pins of a voltage island. Background technique [0002] The dynamic power consumption of integrated circuits is proportional to the square of the power supply voltage, and the static power consumption is also proportional to the voltage. Therefore, reducing the power supply voltage of the chip is considered to be the most effective and direct low-power design method. The multi-voltage technology is based on this principle, supplying higher voltage to key circuit macro modules (hereinafter referred to as modules) in the chip to ensure the performance of the chip; and supplying lower voltage to non-critical modules to save power consumption. In order to reduce the complexity of power network design, modules working at the same operating voltage are often gathered in a continuous physical space to form a voltage island (...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/39
Inventor 储著飞夏银水王伦耀
Owner NINGBO UNIV
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