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Method and system of programmable controller and clock frequency control

A programming controller and clock frequency technology, which is applied in the field of communication, can solve the problems that the clock frequency cannot be met, the external clock source cannot be used flexibly and conveniently, and the chip cannot meet the clock demand.

Active Publication Date: 2012-05-09
RUIJIE NETWORKS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, many clock demand chips in the whole machine need to input corresponding clock signals from an external clock source to start the chip work. Generally, the external clock source is directly fixed in the whole machine. When starting the clock demand chip to work, due to the fixed hardware The external clock source can only provide a single clock frequency. Therefore, the clock frequency received by the clock demand chip from the external clock source signal is also a fixed value. When the clock demand chip wants to increase the clock frequency to improve its own functions and performance, this Such a design cannot meet the clock requirements of the chip for the clock frequency
And in actual use, a single external clock source cannot be used flexibly and conveniently, and cannot meet the clock requirements of the chip for different clock frequencies.

Method used

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  • Method and system of programmable controller and clock frequency control
  • Method and system of programmable controller and clock frequency control
  • Method and system of programmable controller and clock frequency control

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0038] Example 1: The execution process of the programmable controller, such as figure 2 As shown, the following steps may be included:

[0039] S101, the clock adjustment module 101 receives the judgment instruction sent by the CPU or the clock demand chip, the judgment instruction carries the clock frequency of the clock signal required by the clock demand chip;

[0040] S102, the clock adjustment module 101 obtains the external clock source signal from the external clock source signal detection module 103, and judges whether the clock frequency of the received external clock source signal is the clock frequency of the clock signal required by the clock demand chip, if yes, execute Step S103, if not, execute step S105;

[0041] S103, the clock adjustment module 101 sends an opening instruction to the switch module;

[0042] S104, after the switch module 104 is turned on, the clock adjustment module 101 sends the received external clock source signal to the clock demand ch...

example 2

[0049] Example 2: The execution flow of the programmable controller, such as image 3 As shown, the following steps may be included:

[0050] S201. The clock adjustment module 101 receives an adjustment command sent by the CPU or the clock demand chip, and the adjustment command carries frequency adjustment mode information for adjusting the external clock source signal to the clock signal required by the clock demand chip;

[0051] S202. The clock adjustment module 101 sends a frequency conversion instruction to the instruction identification sub-module 1021 in the clock frequency conversion module 102 according to the frequency adjustment mode information carried in the adjustment instruction;

[0052] Specifically, when the adjustment mode represented by the frequency adjustment mode information is to perform up-frequency adjustment, an up-frequency instruction is sent, and when the adjustment mode represented by the frequency adjustment mode information is to perform down-...

example 3

[0093] Example 3: The processing flow of the clock frequency control system, such as Figure 8 As shown, the following steps may be included:

[0094] S601. The CPU sends an opening command to the channel switch;

[0095] S602. After the channel switch opens the channel, the external clock source sends an external clock source signal to the clock demand chip;

[0096] S603, the clock demand chip judges whether the clock frequency of the received external clock source signal is the clock frequency of the clock signal required by itself, if yes, execute step S604; if not, execute step S605;

[0097] S604. The clock demand chip sends a successful response to the CPU;

[0098] S605. The clock demand chip sends a judgment command or an adjustment command to the programmable controller. The judgment command carries the clock frequency of the clock signal required by the clock demand chip, and the adjustment command carries the signal of adjusting the external clock source to the c...

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Abstract

The invention discloses a method and system of a programmable controller and clock frequency control. When a clock frequency of an external clock source signal is different from a clock frequency of a clock signal required by a clock requirement chip, the programmable controller performs frequency conversion to the external clock source signal so as to obtain a processed clock signal and transmit the processed clock signal to the clock requirement chip, then the clock frequency of the processed clock signal is the same as the clock frequency of the clock signal required by the clock requirement chip, therefore a required clock signal which meets the clock frequency requirement of the clock requirement chip is provided to the clock requirement chip when the external clock source signal has a single clock frequency and the clock frequency is different from the clock frequency of the clokc signal required by the clock requirement chip.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a programmable controller, a clock frequency control method and a system. Background technique [0002] At present, many clock demand chips in the whole machine need to input corresponding clock signals from an external clock source to start the chip work. Generally, the external clock source is directly fixed in the whole machine. When starting the clock demand chip to work, due to the fixed hardware The external clock source can only provide a single clock frequency. Therefore, the clock frequency received by the clock demand chip from the external clock source signal is also a fixed value. When the clock demand chip wants to increase the clock frequency to improve its own functions and performance, this Such a design cannot meet the clock requirement of the chip for the clock frequency. And in actual use, a single external clock source cannot be used flexibly and conven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/05
Inventor 杨勇
Owner RUIJIE NETWORKS CO LTD
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