Jump edge detection method and device with glitches capable of being removed

Abstract

The invention belongs to the technical field of integrated circuit signal processing, and provides a jump edge detection method and device with glitches capable of being removed. The method comprises the steps that according to the type and the timing sequence of jump edges, a main controller is provided with a jump edge sequence used for sampling through a sequence configuration register; a sampling clock samples interface data at a preset frequency; the interface data are stored through a displacement register, wherein the interface data enter in from the left end of the displacement register, and the displacement register is moved rightwards by a bit when one bit of interface data enters in; a comparison register sets the comparison bits of the sequence configuration register and the displacement register, whether the given bit data from the left in the displacement register and the corresponding bit data in the jump edge sequence in the sequence configuration register are equal or not is compared, and if yes, it is displayed that the effective jump edge is achieved. The jump edge detection method and device can detect the jump edge and filter out the glitches at the same time.

Description

technical field [0001] The invention belongs to the technical field of integrated circuit signal processing, and in particular relates to an edge detection method and device capable of filtering burrs. Background technique [0002] Jump edge detection is widely used in various transmission protocols, and is used as a signal start flag, completion flag, sleep wake-up signal, etc. Therefore, the detection of the rising edge and the falling edge of the interface signal has become a required function of many electronic devices. With the development of portable and miniaturized electronic equipment, the high-density device layout in the equipment motherboard makes noise one of the main problems in circuit design, and noise and interference can easily cause glitches in chip interface signals. The so-called glitch is a signal jump that is less than the defined minimum time. Sampling the glitch signal will cause a circuit or system error response, resulting in system instability or...

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a jump edge detection method and device capable of filtering out glitches, aiming to solve the problem that the glitch filtering circuit in the prior art is relatively complicated, the width of the filtered glitches is relatively fixed, and the adaptability is insufficient. When it is necessary to perform edge detection, the edge detection circuit and the glitch filtering circuit must be set at the same time, which is a problem of high cost.

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