A full customization method and system for a digital-analog hybrid chip asynchronous circuit

Abstract

The invention discloses a full customization method and system for a digital-analog hybrid chip asynchronous circuit. the method includes: based on a process for determining design indexes based on adigital-analog hybrid chip, establishing a digital unit library meeting a preset condition, wherein the number of the digital units contained in the digital unit library is minimum; designing a circuit schematic diagram of the digital-analog hybrid chip based on a digital unit library and a component library; and performing automatic layout and wiring on the digital circuit module of the asynchronous circuit structure by adopting a synchronous circuit automatic layout and wiring tool to obtain a layout, and performing circuit analog simulation on the layout hierarchical netlist containing parasitic parameters and the simulation model after determining that the layout meets a design rule and the layout is consistent with a circuit schematic diagram. According to the invention, the design cycle and workload of establishing the digital unit library are reduced by establishing the digital unit library with the least number of digital units; Based on a digital cell library, a synchronous circuit automatic layout and wiring tool is adopted to perform automatic layout and wiring on the digital circuit module of the asynchronous circuit structure so as to improve the wiring efficiency.

Description

technical field [0001] The invention relates to the field of electronic technology, and more specifically, to a method and system for fully customizing an asynchronous circuit of a digital-analog hybrid chip. Background technique [0002] A digital-analog hybrid chip is generally composed of an analog circuit module, a digital circuit module, an input / output (I / O) module, a storage module, and the like. Among them, the analog circuit modules include: analog-to-digital converters, digital-to-analog converters, phase-locked loops, oscillators, voltage regulators, comparators, operational amplifiers, and bandgap references. Digital circuit modules include: digital core, protocol interface module, timing module, watchdog, etc. Storage modules include: one-time programming (OTP), multiple programming (MTP), random access storage (RAM), read-only storage (ROM), flash memory (Flash), etc. [0003] At present, the digital-analog hybrid chip mainly adopts the combination of full cu...

AI Technical Summary

Problems solved by technology

[0004] However, there are many problems in the semi-custom design based on synchronous circuits in the prior art, such as: (1) In order to meet various application requirements as much as possible, the design cost, trial and error cost, error correction cost, and testing cost of standard cell library and standard IO library The cost is expensive, so the authorization fee is relatively high. For products that are not in large quantities but have market demand, they can only be discouraged.

(2) In the application requirements of multiple voltage domains, generally only the standard cell library of the lowest voltage domain is provided, which cannot meet the requirements of standard cell libraries of other voltage domains

(3) For special application requirements, only relatively few logic units and IO units are required, but due to the unchangeability of the standard unit library and the standard IO library, it cannot be flexibly applied

[0005] Based on this, existing technicians have proposed a full-customization method for digital-analog hybrid chip asynchronous circuits. Although this method can solve the problems existing in the semi-custom design based on synchronous circuits, in the overall design cycle of the project, manual drawing is used. The layout design cycle accounts for a relatively large proportion of the total design cycle, especially the digital circuit module part

As the functions of digital-analog hybrid chips become more and more complex, the area of ​​digital circuit modules accounts for an increasing proportion of the total area of ​​digital-analog hybrid chips. If digital circuit modules are designed by hand-drawn layout, it will greatly extend the Hybrid chip design cycle

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