A pin multiplexing circuit for asynchronous interactive interface monitoring

Abstract

The present invention adopts a pin multiplexing circuit for asynchronous interactive interface monitoring, the monitoring signal is an interactive signal between the asynchronous clock domain 1 and the clock domain 2, and the register configuration module performs register configuration for multiplexing the monitoring pins and function pins The monitoring pin control module selects the N monitoring signals of the asynchronous clock domain 1 and the clock domain 2 according to the N monitoring signals output by the register configuration module, and finally outputs 1 monitoring signal as the monitoring output signal; the functional pin control module According to the functional pin configuration output by the register configuration module, the multiplexing of M functional pins is controlled and managed, and finally one functional signal is obtained; the pin selection multiplexing module selects the monitoring function according to the monitoring function selection signal output by the register configuration module. The monitoring output signal output by the pin control module, as well as the function input signal, function output signal and function direction selection signal of the function pin control module are used for pin multiplexing determination to complete the final pin multiplexing function.

Description

Technical field [0001] The present invention relates to the SoC chip pin multiplexing asynchronous interactive interface monitoring purposes, specifically for the interactive interface pin multiplexing an asynchronous circuit for monitoring. Background technique [0002] With the development of technology, the complexity of SoC increasing the degree of integration in SoC chip asynchronous modules are also increasing. SoC chip within the module asynchronous interaction between functional requirements and also with the increase, while asynchronous interaction modules in question are difficult to troubleshoot, especially for the circuit has been taped, because all asynchronous signals are internal signals, not external monitor, and emergence multi-mode for a particular problem, it produced under certain circumstances, rely on logic simulation is not necessarily able to reproduce the problem or take a long time to be able to reproduce the problem, and thus be able to locate the probl...

AI Technical Summary

Problems solved by technology

In addition, for the Chinese patent CN105068950, the name is a pin multiplexing system and method, through multiple signal channels, select modules, register modules, judgment modules and multiplexing output modules, and finally output multiple multiplexing pins The effective signal and input, output, and high-impedance state of the system, the pin multiplexing of the system needs to add multiple control management modules, and the control logic is complex

Images