System for initially generating stabilized in-chip clock

Abstract

The invention discloses a system for generating on chip clock of a stabilizer fin through initialization, which comprises a chip provided with a clock automatic locking - integrated circuit configuration IP, a crystal oscillation clock source, a nonvolatile memory and a light-emitting diode, wherein the clock automatic locking - integrated circuit configuration IP comprises a phase discriminator,a charge pump, an analog-to-digital converter, a register, a digital-to-analog converter, a current / voltage controlled oscillator and a frequency locking detection circuit; the crystal oscillation clock source is connected with the input at one end of the phase discriminator; the phase discriminator, the charge pump, the analog-to-digital converter and the register are connected in turn; the register is also connected with the digital-to-analog converter and the nonvolatile memory; and the output of the digital-to-analog converter is connected with the input of the current / voltage controlled oscillator, and the output of the current / voltage controlled oscillator is connected with the input on the other end of the phase discriminator, so as to form a circuit; and both output of the crystaloscillation clock source and the output of the current / voltage controlled oscillator are connected with the frequency locking detection circuit. The system can greatly simplify the correction and regulation flow and reduce the cost.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a system for initializing and generating a stable internal clock. Background technique [0002] A stable and accurate clock is very important to the work of the circuit system. The traditional technology generally uses an external active / passive crystal oscillator to realize it, which requires adding additional devices, which increases the cost and area of ​​the circuit system. The traditional technology also adopts the hardware / software trimming of the on-chip oscillator to achieve a more accurate clock, but expensive test instruments and complicated testing steps are required, and the hardware trimming also increases the process cost. Contents of the invention [0003] The purpose of the present invention is to provide a system for initializing and generating a stable on-chip clock. The error generated in the manufacturing process of the on-chip clock is corrected through t...

AI Technical Summary

Problems solved by technology

The traditional technology also uses hardware / software trimming of the on-chip oscillator to achieve a more accurate clock, but expensive test instruments and complicated test steps are required. In addition, hardware trimming also increases the process cost.

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