Dissertation > Excellent graduate degree dissertation topics show

Research and Design of Real Time Clock Chip with Calibration

Author: LiGenZuo
Tutor: ZouXueCheng
School: Huazhong University of Science and Technology
Course: Microelectronics and Solid State Electronics
Keywords: Real-time clock Calibration Crystal Oscillator Multiple clock domains Interface Design
CLC: TN402
Type: Master's thesis
Year: 2007
Downloads: 253
Quote: 3
Read: Download Dissertation

Abstract


Real-time clock chip is currently the most widely used consumer electronics products, required for the system to provide accurate time reference , the current use of high precision real-time clock crystal oscillator as the clock source. However, due to the crystal frequency changes with temperature change , and the crystal at room temperature, the frequency of the packaging, and other reasons may generate a fixed frequency deviation , resulting in a reduction in real-time clock timing accuracy . At room temperature (25 ℃), real-time clock accuracy of about ± 20 ppm. In this paper, the crystal oscillator drift characteristics , temperature compensated crystal oscillator reference microprocessor principle , according to the real-time clock circuit characteristics, the design of a frequency divider chain based calibration algorithm . The algorithm can be set via a calibrated digital calibration registers divided clock frequency , without changing the crystal oscillator can be adjusted in case the divided clock frequency , the calibration accuracy of ± 0.25 ppm, calibration range ± 32 ppm, indirectly clock calibration. When the real-time clock and temperature sensor and MCU to work together , according to the temperature and the factory settings look-up table for self-calibration. Based on the analysis of the calibration algorithm , based on a top-down (TOP-DOWN) design method to achieve a real-time clock in the design and verification. In this paper the analysis of multi-clock domain synchronization , based on the timing for the I2C interface and an internal two clock domains , the design of EDA tools can meet the requirements, without increasing the power consumption of multi- clock domain data transfer program , in an integrated and automatic placement and routing later through a variety of authentication methods prove its functionality and timing can meet the requirements . The program is suitable frequency difference between the larger clock domain synchronization , avoiding the use of clock switching methods led to increased power consumption , on the other chip design reference value . In this paper, Verilog HDL realize real-time clock front-end design , the use of Synopsys EDA tools for back-end design and verification. Through the full-chip simulation and power analysis after the show that the design method to meet the real-time clock accuracy and low power requirements.

Related Dissertations

  1. Quantitative Analysis of Pyrolysis Component of Typical Low Volatile Coal of Chinese,TQ530.2
  2. The Research of 3D Human Motion Capture Based on Reference Points,TP391.41
  3. Camera Calibration and Position and Pose Detecting on Vision Measurement System of PCB,TP391.41
  4. Key Control Technique of Wafer Handling Robot,TP242.2
  5. Study of the Bank’s ATM Interface Design,TP11
  6. The Identification of Fault Type in Transmission Lines Based on Neural Network,TP183
  7. Sound source directional mobile robot Methods,TP242
  8. Calibration and Application of Inertial Measurement Unit Based on MEMS Gyro,V241.5
  9. Automatic Calibration System Voltage Monitor,TM933.2
  10. Temperature Compensation and Auto-calibration of High-Precision Electronic Balance,TP274
  11. Design and Implement of Application Interface to XX System,TP311.52
  12. The Corporate Affairs Calendar instant management system,TP311.52
  13. Design and realization of high-speed of the wind tunnel balance calibration software,TP311.52
  14. Research on the Vision Control and Trajectory Planning of Fruit Picking Robot,TP242.6
  15. Design and implementation of the multi-channel pressure sensor auto-calibration system,TP212
  16. The Design and Implementation of a Game Interface Interaction on Mobile Phone,TP311.52
  17. The Research and Implement on Camera Calibration Technology Based on Trifocal Tensor,TP391.41
  18. Research and Implementation of the 3D Reconstruction Based on Surface Structured Light Method,TP391.41
  19. Single Camera Calibration Method Based on Dual-mirror Imaging,TP391.41
  20. Study on Instrument Calibrator for Diesel Engines and Its Integrated Information Management System,TK426
  21. Research and Design of a Real-Time Clock Chip with Programming,TN402

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Microelectronics, integrated circuit (IC) > General issues > Design
© 2012 www.DissertationTopic.Net  Mobile