基于片上系统的时钟复位设计

发布时间：2018-07-08 21:02

本文选题：片上系统 + 时钟设计　；参考：《半导体光电》2017年02期

【摘要】：从方法优化和电路设计入手,提出了基于片上系统(SOC)的复位方法和时钟复位电路。设计了片外按键复位电路、片内上电电路、晶振控制电路、片内RC低频时钟电路、槽脉冲产生电路、分频延时电路、时钟切换电路及异步复位同步释放电路等电路模块。以上电路模块构成了片上系统的时钟复位电路,形成了特定的电路时钟复位系统。该时钟复位系统将片外按键复位与片内上电复位结合起来,形成多重复位设计,相比单纯按键复位更智能,相比单纯上电复位则更可靠。另外,该时钟复位系统还采用了片内RC振荡时钟电路等一系列电路,借助片内RC时钟实现对芯片的延时复位,进而在保证复位期间寄存器得到正确初始化的同时,还使得芯片能够始终处在稳定的晶振时钟下正常工作。相比传统的时钟复位电路,该时钟复位系统既便捷,又保证了系统初始化和系统工作的可靠性。
[Abstract]:Starting with method optimization and circuit design, a reset method and clock reset circuit based on on-chip system (SOC) are proposed. The key reset circuit, on-chip circuit, crystal oscillator control circuit, in-chip RC low-frequency clock circuit, slot pulse generation circuit, frequency division delay circuit, clock switching circuit and asynchronous reset synchronous release circuit are designed. The above circuit modules constitute the clock reset circuit of the on-chip system and form a specific circuit clock reset system. The clock reset system combines the out-of-chip keystroke reset with the on-chip reset to form a multiple reset design, which is more intelligent than the simple keystroke reset and more reliable than the power-on reset. In addition, a series of circuits, such as in-chip RC oscillation clock circuit, are used in the clock reset system, which realizes the delayed reset of the chip with the help of the in-chip RC clock, thus ensuring the correct initialization of the registers during the reset period. It also enables the chip to always work under a stable crystal clock. Compared with the traditional clock reset circuit, the clock reset system is convenient and reliable in system initialization and operation.
【作者单位】：重庆光电技术研究所;
【分类号】：TN47

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