Pin multiplexing circuit for asynchronous interactive interface monitoring

Abstract

The invention discloses a pin multiplexing circuit for asynchronous interactive interface monitoring. Monitoring signals are signals for interaction between an asynchronous clock domain 1 and an asynchronous clock domain 2, and a register configuration module performs register configuration on multiplexing of monitoring pins and function pins; a monitoring pin control module selects N monitoring signals of the asynchronous clock domain 1 and clock domain 2 according to N monitoring enablings output by the register configuration module, and finally outputs one monitoring signal as a monitoringoutput signal; a function pin control module controls and manages the multiplexing of M function pins according to the function pin configuration output by the register configuration module, and finally obtains one function signal; and a pin selection multiplexing module performs pin multiplexing determination on the monitoring output signal output by the monitoring pin control module, as well asa function input signal, a function output signal and a function direction selection signal of the function pin control module according to a monitoring function selection signal output by the register configuration module to complete the final pin multiplexing function.

Description

technical field [0001] The invention relates to pin multiplexing for monitoring asynchronous interactive interfaces in SoC chips, in particular to a pin multiplexing circuit for monitoring asynchronous interactive interfaces. Background technique [0002] With the continuous development of process technology, the complexity of SoC continues to increase, and the integration level of asynchronous modules in the SoC chip also continues to increase. The interaction between asynchronous modules in the SoC also increases with the functional requirements, and it is difficult to troubleshoot problems with the interaction of asynchronous modules, especially for circuits that have been taped out. Since all asynchronous signals are internal signals, they cannot be monitored externally. The problem situation is mostly a specific pattern, which only occurs in a specific situation. Relying on logic simulation may not be able to reproduce the problem or it may take a long time to reproduce...

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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

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