Design method for digital analogy multiplex input/output (IO) pin structure

Abstract

The invention discloses a design method for a digital analogy multiplex input / output (IO) pin structure. The method includes that a digital IO pin unit meeting product requirements is selected in a general digital IO pin unit base and has a static releasing protecting circuit. In chip front end design, a simulating IO signal line is connected with a chip binding connector of the digital IO pin unit, and a static releasing secondary protecting circuit of a simulating IO pin is designed according to use of simulating signals. A chip-level integration netlist is synthesized, a gate-level netlist is generated, layout wiring work is finished through an automatic layout wiring tool, and a layout wiring result is led into a layout design tool. The simulating IO signal line connected with the general digital IO pin unit is arranged according to chip binding types. Design rule checking and layout design principle pattern consistency checking are conducted on the pin structure. By means of the design method, a design period is short, product cost is reduced, and market competitiveness of products is improved.

Description

technical field [0001] The invention relates to the field of microcontroller communication, in particular to a design method for a digital-analog multiplexing IO pin structure. Background technique [0002] In order to reduce product design and manufacturing costs, product generalization becomes more and more important. In the microcontroller market, suppliers hope to provide different microcontroller chips to different customers in the shortest possible time. The current solution is to implement all basic functions in the same chip, and let customers choose which functions to enable. and which features to turn off. Nowadays, pin multiplexing technology is widely used in the field of general-purpose chip products, and customers can configure the pins to their desired functions through software. For example, a pin can be used not only as a GPIO (general-purpose input and output port), but also as a driver port of a liquid crystal display, and as a signal input port of an AD...

AI Technical Summary

Problems solved by technology

[0006] As shown in Figure 1, in order to save expenses and reduce costs, the digital IO signal is connected to the digital IO module, the analog IO signal is connected to the analog IO module, and finally when packaging, the two modules are directly chip-bonded One pin, so as to achieve the purpose of digital-analog multiplexing, but the result will greatly increase the chip area, especially for those general-purpose chip products with multiple-mode IO pins, the cost of the product cannot be reduced

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