Flexible configuration device for multiplexing functional pin and implementation method of flexible configuration device

Abstract

The invention discloses a flexible configuration device for a multiplexing functional pin and an implementation method of the flexible configuration device. The device comprises a level setting module and an isolation module, wherein the level setting module is used for completing configuration of a hardware configuration signal and comprises resistors R1 and R2 and a switching device SW1; the resistors R1 and R2 are connected in series between a power source and the multiplexing functional pin; the resistor R1 is connected with the power source, and the resistor R2 is connected with the multiplexing functional pin; one end of the switching device SW1 is connected with the ground, and the other end of the switching device SW1 is connected with the joint of the resistors R1 and R2; and the isolation module is a switching device SW2, one end of the switching device SW2 is connected with the joint of the multiplexing functional pin and the resistor R2, and the other end of the switching device SW2 is connected with an opposite device. By the adoption of a combination circuit comprising the level configuration module composed of the two resistors and one switch and the isolation module composed of one switch, the problems of chip adjustment and testing and maintenance inconvenience are solved, and meanwhile the universality of the multiplexing functional pin as GPIO is not limited.

Description

technical field [0001] The invention relates to the field of chip application design, in particular to a flexible configuration device for multiplex function pins and an implementation method thereof. Background technique [0002] Usually, after the processor chip (such as CPU, MCU, DSP) is powered on and reset, the system has two modes to choose to enter: first: user code mode, which starts to move the user code, and then the user code controls the processor chip work; second: commissioning mode, which is commonly used to interact with the commissioning software of the host computer after connecting the emulator through the JTAG (Joint Test Action Group) interface, and is controlled by the code running on the commissioning software Processor chip working. As the processing capacity of processor chips continues to increase, the functions realized become more and more complex, and the demand for storage space for storing user codes is also increasing. More and more processor...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a flexible configuration device for multiplexing function pins and its implementation method for the above-mentioned deficiencies...

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