Digital logic circuit module with reset and burr removing function

Abstract

The invention provides a digital logic circuit module with a reset and burr removing function. The digital logic circuit module comprises an input end rst_in, a negative edge burr removing unit, a positive edge burr removing unit, a testing mode selection unit, a stable reset generating output unit and an output end rst_out, wherein the positive edge burr removing unit comprises a second D triggerset and an AND gate, and when a middle reset signal por_with_pos_glitch is sent to the input end D of the first D trigger in the second D trigger set, under control of an input synchronous clock signal clk_in, output signals of the M D triggers in series connection are directly sent to the AND gate to conduct 'AND' operation to filter out positive edge burrs and negative edge burrs of a reset control signal PAD_RESETN. Besides, the digital logic circuit module supports a DFT test, and a testing mode control signal test_mode makes output rst_out of the digital logic circuit module equal to input rst_in to ensure that reset R of the digital logic circuit module is totally controllable.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to the logic design of chip hardware, in particular to a digital logic circuit module with reset and deburring functions. Background technique [0002] Digital logic circuit modules are divided into two categories according to their structural characteristics: combinational logic circuits (referred to as combinational circuits) and sequential logic circuits (referred to as sequential circuits). The sequential logic circuit is a logic circuit with a memory function, and the memory element generally adopts a D type flip-flop (DFF for short). [0003] D flip-flops are widely used and can be used as digital signal registers, shift registers, frequency division, and waveform generators. D flip-flop is an information storage device with memory function and two stable states (0 or 1). It is the most basic logic unit that constitutes a variety of sequential circuits, and it is ...

AI Technical Summary

Problems solved by technology

[0009] However, the current reset deglitch circuit in the industry is implemented by using a conventional D flip-flop with a reset circuit, but during the asynchronous reset operation of the chip, the clock / reset functions in the conventional D flip-flop with a reset circuit may be mutually dead. In addition, it is difficult for the above-mentioned reset deburring circuit to remove positive and negative edge burrs at the same time, and the length of the burr that can be processed is also limited.

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