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Chip clock signal generation circuit and chip system

A clock signal and circuit generation technology, applied in the direction of electrical components, automatic power control, etc., can solve the problems of increased chip cost and large occupied area

Active Publication Date: 2014-02-12
NATIONZ TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a chip clock signal generation circuit, aiming at solving the problem of a large increase in chip cost caused by the large occupied area of ​​the clock adjustment circuit provided by the prior art

Method used

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  • Chip clock signal generation circuit and chip system
  • Chip clock signal generation circuit and chip system
  • Chip clock signal generation circuit and chip system

Examples

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Effect test

example 1

[0049] This example is used to illustrate the chip clock signal generating circuit 100 that provides a high-precision target clock signal for the chip, wherein the theoretical frequency of the basic clock signal CLK0 output by the basic clock signal generating module 101 is 800MHz±30% (here Assuming that the frequency deviation is +24%, the actual frequency of the basic clock signal CLK0 is 992MHz, which belongs to a high-frequency clock signal), the frequency of the target clock signal CLKS required inside the chip is 20MHz, and the frequency parameter storage module 102 is EEPROM, and the frequency parameter Reading and processing module 103 is the CPU inside the chip, and the initial frequency division factor of clock frequency division module 104 is 64, and frequency parameter writing module 105 is EEPROM data downloading circuit (such as Figure 4 shown).

[0050] After the chip clock signal generation circuit 100 is powered on, the basic clock signal generation module 10...

example 2

[0053] This example is used to illustrate the chip clock signal generation circuit 100 that provides high-precision timing digital signals outside the chip, wherein the theoretical frequency of the basic clock signal CLK0 output by the basic clock signal generation module 101 is 32MHz±30% (here Assuming that the frequency deviation is -27.5%, the actual frequency of the basic clock signal CLK0 is 23.2MHz, which belongs to a low-frequency clock signal), the frequency parameter storage module 102 is FLASH, the frequency parameter reading and processing module 103 and the frequency parameter writing module 105 Included in the FLASH controller inside the chip, the baud rate of the external target timing digital signal OCLKS output by the external timing digital signal generation module 107 is 9600bps (such as Figure 5 As shown), since the basic clock signal CLK0 is a low-frequency clock signal, the external clock frequency detection circuit 200 does not need to perform initial fre...

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Abstract

The invention is applied to the field of integrated circuit design, and provides a chip clock signal generation circuit and a chip system. The chip clock signal generation circuit comprising a basic clock signal generation module, a frequency parameter storage module, a frequency parameter reading and processing module and a clock divider module is adopted in a chip and is simple in structure and small in size, it is guaranteed that high precision clock signals are provided for the internal of the chip, meanwhile cost of the chip is reduced, and therefore the problem that the cost of the chip is substantially increased due to the fact that a clock adjusting circuit in the prior art occupies a large area is solved.

Description

technical field [0001] The invention belongs to the field of integrated circuit design, in particular to a chip clock signal generating circuit and a chip system. Background technique [0002] In a semiconductor integrated circuit, each component is controlled based on a clock signal, and the current clock signal can be obtained in two ways, one is generated by a quartz crystal oscillator outside the chip, and the other is a Generated by the clock circuit inside the chip. [0003] The use of a quartz crystal oscillator as a clock signal source can ensure that the generated clock signal is stable and accurate, and is currently the most widely used clock signal source. With the continuous advancement of electronic technology and people's increasing demand for miniaturization and thinning of products, if the clock signal source can be integrated inside the chip, the volume of the product will be greatly reduced. Obviously, the quartz crystal oscillator is because of its The l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/085H03L7/18
Inventor 孙龙张毅
Owner NATIONZ TECH INC