Digital calibration method and device for built-in high-precision high-speed oscillator of SoC
A technology of a calibration device and a calibration method, which is applied in the electronic field, can solve problems such as slow convergence speed, and achieve the effects of improving half-bit accuracy, facilitating operation, and improving efficiency
Pending Publication Date: 2020-06-02
核芯互联科技(青岛)有限公司
View PDF2 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] To this end, the present invention provides a digital calibration method and device for a SoC built-in low-power high-precision high-speed oscillator, to solve the problem of slow convergence speed caused by algorithms in the frequency calibration of high-speed oscillators in the prior art
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0045] The implementation mode of the present invention is illustrated by specific specific examples below, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this description. Obviously, the described embodiments are a part of the present invention. , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0046] A calibration method for a high-speed oscillator, see figure 1 , the method includes:
[0047] Step S101, obtaining the reference frequency of the off-chip auxiliary calibration device; and the calibrated output frequency of the high-speed oscillator;
[0048] Among them, the reference frequency can be provided by an external auxiliary host computer;
[0049] The output frequency of the h...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to the technical field of electronics, in particular to a digital calibration method and device for a built-in high-precision high-speed oscillator of an SoC. The digital calibration method of a high-speed oscillator comprises an off-chip auxiliary calibration device, an on-chip I / O multiplexing management module, an OSC digital fast frequency calibration module, a calibration result decision device, an on-chip high-speed oscillator and an embedded Flash, wherein a dichotomy progressive rapid correction calibration algorithm supports configurable Trim bit width parameterization of a calibration register so as to meet different SoC chip calibration error requirements; according to the digital calibration process of the on-chip high-speed oscillator, a threshold value can be quickly found through dichotomy recursive judgment, so that the efficiency is improved, and the process is simple. Furthermore, a primary calibration error decision device is additionally arranged, so that the half-bit precision of the calibration system can be further improved. In addition, the off-chip auxiliary calibration device provides a low-speed clock reference and an upper computercalibration operation interface, so that the user operation is facilitated, and the mass production process is accelerated.
Description
technical field [0001] The invention relates to the field of electronic technology, in particular to a digital calibration method and device for a SoC built-in high-precision high-speed oscillator. Background technique [0002] On-chip high-speed oscillators are widely used in timers and pulse sources because of their easy frequency adjustment, small component size, low cost and low energy consumption. It can convert a DC signal into a periodic AC signal without an external excitation signal. However, in practical applications, the on-chip high-speed oscillator will be limited by technology and temperature, and the output frequency may have a large error. However, the traditional on-chip high-speed oscillator only achieves the purpose of shaping the waveform, and essentially does not improve the cycle accuracy of the on-chip high-speed oscillator. The accuracy and speed of the algorithm in the frequency calibration module are directly related to the performance of the cloc...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/099
CPCH03L7/0992
Inventor 陈伟杰
Owner 核芯互联科技(青岛)有限公司