Design and Research on an Efficient Self Calibration of Chip Internal Clock

Clock is one of the most important signals in a chip. However, due to changes in materials, packaging, process, temperature, and other manufacturing processes, there may be deviations in the internal clock frequency of the chip after the completion of chip manufacturing, which can affect the functionality and performance of the chip. This article proposes a design method for a self calibration module of the internal clock of a chip. This method uses digital circuit design and software programming to achieve self calibration of the internal clock frequency of the chip, which stabilizes the internal clock frequency of the chip within the preset range, reduces errors, and can maintain high-precision clocks in situations such as chip process deterioration and environmental temperature changes, This self calibration module design method can be widely applied in various chip designs, improving the performance and stability of chips. In this paper, a CLKTRIM module was designed through digital circuits to accurately collect the internal clock of the chip. By writing a self calibration software program and cooperating with the analog clock module inside the chip, the internal clock of the chip was calibrated, achieving the effect of accurate and stable internal clock. This design method has been applied to practical chip applications, and has significant effects on the use of chip internal clocks.