WO2015131726A1

WO2015131726A1 - Method and apparatus for controlling clock signal output, and function board

Info

Publication number: WO2015131726A1
Application number: PCT/CN2015/071758
Authority: WO
Inventors: 璩国伟
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-08-22
Filing date: 2015-01-28
Publication date: 2015-09-11
Also published as: CN105353827A

Abstract

A method and apparatus for controlling signal output of a clock output unit, and a function board. The clock output unit is used for providing clock signals to a function extension module inserted into the function board. The method comprises: when the function board is powered on, detecting whether the function board has the function extension module inserted; when detecting that the function extension module exists, executing a first control operation to make the clock output unit output a clock signal to the function extension module, enabling the function extension module to work properly; and when detecting that the function extension module does not exist, executing a second control operation to shut down the clock output unit, thereby avoiding unnecessary power consumption.

Description

Method, device and function board for controlling clock signal output

Technical field

The present invention relates to the field of clock control, and in particular, to a method, device and function board for controlling clock signal output.

Background technique

In order to meet the needs of different customers, Ethernet communication equipment manufacturers are striving to introduce products with diversified functions and modularity to enhance the market competitiveness and adaptability of products. Users can purchase corresponding function expansion modules according to their own needs. Different function expansion modules need to be inserted above the main function board for use.

For the clock processing scheme of the function expansion module, the following common technical means are as follows:

1. The main function board has a multi-output clock generation chip that provides the reference clock required by each module circuit of the device. For the clock requirements of different function expansion modules, it is usually reserved for the corresponding clock pins in the hardware circuit design. The drawback of the actual use is that the clock chip has a clock output regardless of whether the function expansion module is plugged or unplugged.

2. The main function board does not make clock reservation wiring processing for the function expansion module, and the function expansion module has its own clock generation device.

3, in order to improve the reliability of the product, at the cost of the cost, use the combination of the above two hardware circuit design.

As can be seen from the above description, the common technical means have the following problems:

1. When the function expansion module is not inserted, the corresponding clock pin of the multi-output clock chip on the main function board has an output, which not only causes waste of power, but also the high-frequency clock also affects the EMI of the product (electromagnetic interference, Electro -Magnetic Interference) performance.

2. Even if the function expansion module 1 is inserted, the clock pin reserved for the function expansion module 2 in the same slot of the function board is suspended, which also causes waste of power and pin resources, and the clock that is not turned off generates radiation. Affects the EMI performance of the product.

3. Some function expansion modules use local clock generation devices, which can save the main function board The clock wiring should be reserved. The above problems 1 and 2 can be solved by using a local clock, but this scheme not only causes waste of multi-output clock chip resources on the main function board but also increases the cost of the product.

Summary of the invention

Embodiments of the present invention provide a method, apparatus, and function board for controlling clock signal output to avoid unnecessary power consumption of a clock output unit.

In order to solve the above technical problem, an embodiment of the present invention provides a method for controlling a clock signal output for controlling a clock output unit for providing a clock signal to a function expansion module inserted into a function board, the method include:

When the function board is powered on, detecting whether there is an inserted function expansion module on the function board;

When detecting that the function expansion module is present, performing a first control operation, causing the clock output unit to output a clock signal to the function expansion module, so that the function expansion module can work normally;

When it is detected that the function expansion module does not exist, the second control operation is performed to turn off the clock output unit.

Optionally, the performing the first control operation, causing the clock output unit to output a clock signal to the function expansion module, so that the function expansion module can work normally includes:

Determining a module type of the function expansion module;

Determining, according to the module type, a clock signal configuration corresponding to the module type;

The clock output unit is controlled to output the clock signal conforming to the clock signal configuration to the function expansion module, so that the function expansion module can work normally.

Optionally, the clock signal configuration includes an operating frequency, a level type, and/or a level amplitude of the clock signal.

Optionally, if the function expansion module is inserted into the function board after the function board is powered, the controlling the clock output unit outputs the clock conforming to the clock signal configuration to the function expansion module Signals that enable the function expansion module to function properly include:

Performing a reset operation on the function expansion module;

Configuring the clock output unit according to the clock signal configuration, so that the clock output unit outputs the clock signal conforming to the clock signal configuration to the function expansion module;

When the configuration of the clock output unit is completed, it is detected whether the clock output by the clock output unit to the function expansion module is stable, and if it is stable, the reset operation of the function expansion module is stopped.

Optionally, if the function expansion module is inserted into the function board before the function board is powered on, the detecting whether the function expansion module is inserted on the function board comprises:

Determining whether the function expansion module is in place, and if so, determining that the function expansion module exists; if the function expansion module is not in position, determining that the function expansion module does not exist.

The embodiment of the present invention further provides a device for controlling a clock signal output, which is suitable for controlling a clock output unit, wherein the clock output unit is adapted to provide a clock signal to a function expansion module inserted into a function board, and the control device includes:

a detecting module, configured to detect whether there is an inserted function expansion module on the function board when the function board is powered on;

a first control module, configured to perform a first control operation when the function expansion module is detected on the function board, to cause the clock output unit to output a clock signal to the function expansion module, so that the function expansion The module works fine;

The second control module is configured to perform a second control operation to turn off the clock output unit when detecting that the function expansion module does not exist on the function board.

Optionally, the first control module includes:

a first determining unit, configured to determine a module type of the function expansion module;

a second determining unit, configured to determine, according to the module type, a clock signal configuration corresponding to the module type;

And a control unit configured to control the clock output unit to output the clock signal conforming to the clock signal configuration to the function expansion module, so that the function expansion module can work normally.

Optionally, the clock signal configuration includes an operating frequency, a level type, and/or a power of the clock signal. Flat amplitude.

Optionally, the control unit further includes:

a reset subunit, configured to perform a reset operation on a function expansion module inserted into the function board after the function board is powered;

a configuration subunit, configured to configure the clock output unit according to the clock signal configuration, so that the clock output unit outputs the clock signal conforming to the clock signal configuration to the function expansion module;

a detecting subunit, configured to detect whether the clock output by the clock output unit to the function expansion module is stable when the configuration of the clock output unit is completed, and stop resetting the function expansion module if stable operating.

Optionally, the detecting module further includes:

a determining unit, configured to determine whether a function expansion module inserted into the function board before the function board is powered is in place, and if yes, determining that the function expansion module exists; if the function expansion module is not in place, It is determined that the first function expansion module does not exist.

The embodiment of the invention further provides a function board, wherein the function board is provided with a clock output unit and a control device;

The clock output unit is configured to provide a clock signal to a function expansion module inserted into the function board;

The control device is configured to control the clock output unit, and the specific setting is:

Optionally, wherein the control device is further configured to:

Determining a module type of the function expansion module when detecting that the function expansion module exists;

Optionally, wherein the clock signal configuration comprises an operating frequency, a level type and/or a level amplitude of the clock signal.

Optionally, wherein the control device is further configured to:

Performing a reset operation on a function expansion module inserted into the function board after the function board is powered;

The embodiment of the invention further provides a computer program and a carrier thereof, the computer program comprising program instructions, when the program instruction is executed by the clock output control device, the device can implement the method for controlling the output of the clock signal, the carrier There is the computer program.

As can be seen from the above, the embodiments of the present invention have at least the following beneficial effects:

When there is an inserted function expansion module before the function board is powered, it provides a clock signal that can make it work normally. When the function expansion board does not exist before the function board is powered off, the clock is not enabled, thereby avoiding unnecessary Power consumption and electromagnetic interference to other modules;

There is no need to set a local clock generation device on the function expansion module, thereby saving the cost of the function expansion module.

BRIEF abstract

1 is a flow chart showing the steps of a control method according to an embodiment of the present invention;

2 is a block diagram showing a clock signal control circuit and method according to an embodiment of the present invention;

3 is a flowchart showing the operation of a clock signal control circuit and method according to an embodiment of the present invention;

4 is a second working flow chart of a clock signal control circuit and method according to an embodiment of the present invention;

FIG. 5 is a structural block diagram of a control apparatus according to an embodiment of the present invention.

Preferred embodiment of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other. Additionally, although logical sequences are shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

1 is a flow chart showing the steps of a control method according to an embodiment of the present invention. Referring to FIG. 1, an embodiment of the present invention provides a method for controlling clock signal output for controlling a clock output unit, where the clock output unit is used. A clock signal is provided for the function expansion module inserted into the function board, and the control method includes the following steps:

Step 101: When the function board is powered on, detecting whether there is an inserted function expansion module on the function board;

Step 102: When it is detected that the function expansion module is present, perform a first control operation, so that the clock output unit outputs a clock signal to the function expansion module, so that the function expansion module can work normally;

Step 103: When it is detected that the function expansion module does not exist, perform a second control operation to turn off the clock output unit.

The control method is for controlling a clock signal output of a clock output unit.

It can be seen that, in the above manner, when there is an inserted function expansion module before the function board is powered, a clock signal capable of working normally is provided, and the clock output is not enabled when there is no function expansion module inserted before the function board is powered. Units, thereby avoiding unnecessary power consumption and electromagnetic interference to other modules. In addition, there is no need to set a local clock generating device on the function expansion module, thereby saving the cost of the function expansion module.

The function board includes: a main function board of an Ethernet communication device, and the like.

The clock output unit includes: a programmable phase locked loop or the like.

In the embodiment of the present invention, the performing the first control operation, causing the clock output unit to output a clock signal to the function expansion module, so that the function expansion module can work normally may include:

Determining a module type of the function expansion module;

Further, the clock output unit includes at least one clock pin.

The clock signal configuration includes an operating frequency, a level type, and/or a level magnitude of the clock signal.

In the embodiment of the present invention, the function expansion module may be inserted into the function board after the function board is powered, and the clock output unit outputs to the function expansion module to output a configuration that conforms to the clock signal configuration. The clock signal is such that the function expansion module can work normally:

Performing a reset operation on the function expansion module;

In addition, the function expansion module may be inserted into the function board before the function board is powered, and the detecting whether the function expansion module is inserted on the function board includes:

Determining whether the function expansion module is in place, and if so, determining that the function expansion module is detected; otherwise, determining that the function expansion module is not present.

In order to explain the embodiments of the present invention more clearly, an exemplary embodiment of the embodiments of the present invention is provided below.

The exemplary embodiment provides a clock signal control circuit and method, relating to a clock signal configuration, enabling and control circuit and method in an Ethernet communication device, and more particularly, a judgment Whether to insert or remove the function expansion module and the type of the plug-in function expansion module to configure, enable or disable the implementation of the clock signal of the corresponding working frequency and level.

In the exemplary embodiment, the existing clock scheme is optimized to save energy by configuring a programmable phase-locked loop (PLL) for plugging and unplugging different types of function expansion modules, and enabling control circuits and methods for turning on or off the corresponding clocks. Consumption, improve product EMI performance and save product costs.

The exemplary embodiment adopts the following technical solutions:

The main control module configures the programmable PLL according to the plugging and unplugging of different types of function expansion modules, enabling the corresponding clock signal to be turned on or off. The physical structure of the device involved in this implementation method includes: a logic device (FPGA/CPLD) or an embedded controller, a programmable PLL, a switch chip, a function expansion module, the embedded controller includes a processor, a program memory, and Data memory. Take FPGA/CPLE as an example, as shown in Figure 2.

In this scheme, the logic device configures the programmable PLL by determining whether the plug-in function expansion module and the type of the plug-in are enabled and enables the corresponding clock signal to be turned on or off. According to the actual application, the following two scenarios can be divided into: 1. Before the logic device initializes and configures the programmable PLL, the function expansion module is already inserted in the main function unit; 2. After the logic device is initialized and configured to complete the programmable PLL, the interpolation is performed. Install the function expansion module.

The first application scenario is that when the main function board is powered, the function expansion module 1 is detected, and the logic device is instructed to configure the programmable PLL to enable the corresponding clock. The second application scenario is that when the main function board is powered, the function expansion module is not detected, the logic device indicates that the programmable PLL is not configured, the clock of the function expansion module is not enabled, and the switch chip on the main function board is not initialized. Port. When a subsequent user inserts the function expansion module, the logic device instructs the programmable PLL to perform corresponding configuration and enable the clock according to the type of the function expansion module detected; and the switch chip on the main function board initializes the function expansion module to complete the heat. Plug-in does not affect the normal operation of other ports. Or when the user does not need the currently inserted function expansion module, but needs to be replaced with another function expansion module, first turn off the clock, then reset, initialize the configuration of the newly replaced function module, and enable the clock.

Compared with the prior art, the embodiment of the present invention not only realizes that a function expansion module of different clock operating frequencies shares a physical channel of a clock signal, but also can determine whether the type of the hot plug function expansion module and the plug-in function expansion module are provided. The clock signal of the corresponding working frequency greatly reduces the power consumption of the product while reducing the hardware cost.

As shown in FIG. 2, the principle and structure of a clock signal control circuit and method provided by the exemplary embodiment include physical components including: logic device (FPGA or CPLD) or embedded controller 201, programmable PLL 202, a switch chip 203 on the motherboard, and a function expansion module 204.

As shown in FIG. 3 and FIG. 4, the workflow of the clock signal control circuit and method of the present exemplary embodiment is as follows. The logic device FPGA/CPLD is taken as an example:

Step 301. The system is powered on. Figure 3 shows the function expansion module plugged in before the system is powered up. If the function expansion module is inserted after the system is powered on, go to step 401 as shown in FIG.

Step 302. The logic device FPGA/CPLD chip performs a reset operation on the switch chip and the function expansion module on the main function board, and this step does not need to care whether the function expansion module is inserted or not.

Step 303. Determine whether the function expansion module is in place. If the function expansion module is in place, proceed to step 304; if not, go to step 308.

Step 304. Configure the programmable PLL according to the type of the plug-in function expansion module (mainly for the clocks of different frequencies), and the configurable items include the clock frequency, the level type, and the level amplitude.

Step 305. Detect whether the programmable PLL is configured. If the configuration is completed, go to step 306. If no configuration is completed, go to step 304.

Step 306. After detecting that the PLL has been configured, the FPGA/CPLD releases the reset signal of the switch chip and the function expansion module on the main function board.

Step 307. The system completes the initialization operation of the function expansion module.

For the application scenario where the device is powered on when the function expansion module is inserted, as shown in Figure 4:

Step 401. The system operates normally.

Step 402. The FPGA/CPLD detection is to insert or remove the function expansion module. If it is unplugged, then go to step 405.

Step 403. When the insertion function expansion module is detected, the main control switch chip and the newly inserted function expansion module are reset.

Step 404. FPGA/CPLD configures a programmable PLL related register (according to the detected expansion) The type of the module is configured with the clock frequency, level type, and amplitude), and the corresponding clock output is enabled to complete the initialization operation.

Step 405. Step 402 detects that the function expansion module has been pulled out, the FPGA/CPLD configures the relevant register of the programmable PLL, turns off the clock output, and proceeds to step 407.

Step 406. Detect whether the programmable PLL is configured. If the configuration is complete, go to step 408. If no configuration is completed, go back to step 404.

Step 407. Detect whether the programmable PLL is configured. If the configuration is completed, the process proceeds to step 410, otherwise returns to step 405.

Step 408. After detecting that there is a stable clock output, the FPGA/CPLD releases the reset signal of the main control switch chip and the function expansion module.

Step 409. The system completes the initial configuration operation of the hot plug function expansion module.

Step 410. End.

The embodiment is directed to the type of the plug-in function module and whether the clock and the power supply are provided in the position, and the structure is simple and reliable, and the implementation is convenient.

Referring to FIG. 5, an embodiment of the present invention provides a device for controlling a clock signal output, which is suitable for controlling a clock output unit, wherein the clock output unit is adapted to provide a clock signal for a function expansion module inserted into a function board, and the control device includes :

The detecting module 501 is adapted to detect whether there is an inserted function expansion module on the function board when the function board is powered on;

The first control module 502, when detecting the presence of the function expansion module, performs a first control operation, so that the clock output unit outputs a clock signal to the function expansion module, so that the function expansion module can work normally;

The second control module 503 is adapted to perform a second control operation to turn off the clock output unit when detecting that the function expansion module does not exist.

The control device is adapted to control a clock signal output of the clock output unit.

It can be seen that, in the above manner, when there is an inserted function expansion module before the function board is powered, a clock signal capable of working normally is provided, and there is no function of insertion before the function board is powered. The clock is not enabled when the module is extended, thus avoiding unnecessary power consumption and electromagnetic interference to other modules. In addition, there is no need to set a local clock generating device on the function expansion module, thereby saving the cost of the function expansion module.

The first control module 502 can include:

And a control unit, configured to control the clock output unit to output the clock signal conforming to the clock signal configuration to the function expansion module, so that the function expansion module can work normally.

The clock output unit includes at least one clock pin.

In the embodiment of the present invention, the function expansion module may be inserted into the function board after the function board is powered, and the control unit may include:

a reset subunit, adapted to perform a reset operation on the function expansion module;

a configuration subunit, configured to configure the clock output unit according to the clock signal configuration, so that the clock output unit outputs the clock signal that is configured according to the clock signal to the function expansion module;

In addition, the function expansion module may be inserted into the function board before the function board is powered, and the detection module further includes:

The determining unit is adapted to determine whether the function expansion module is in place, and if yes, detecting that the function expansion module exists; otherwise, detecting that the function expansion module does not exist.

The clock output unit is adapted to provide a clock for a function expansion module inserted into the function board signal;

The control device is adapted to control the clock output unit, and is specifically adapted to:

It can be seen that, in the above manner, when there is an inserted function expansion module before the function board is powered, a clock signal capable of working normally is provided, and the clock is not enabled when there is no function expansion module inserted before the function board is powered. This avoids unnecessary power consumption and electromagnetic interference to other modules. In addition, there is no need to set a local clock generating device on the function expansion module, thereby saving the cost of the function expansion module.

One of ordinary skill in the art will appreciate that all or a portion of the steps described above can be accomplished by a program that instructs the associated hardware, such as a read-only memory, a magnetic or optical disk, and the like. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

The invention may, of course, be embodied in a variety of other embodiments without departing from the spirit and scope of the invention. Changes and modifications are intended to fall within the scope of the appended claims.

Industrial applicability

In the embodiment of the present invention, when there is an inserted function expansion module before the function board is powered, a clock signal capable of working normally is provided, and the clock output unit is not enabled when there is no function expansion module inserted before the function board is powered. Unnecessary power consumption and electromagnetic interference to other modules are avoided. In addition, there is no need to set a local clock generating device on the function expansion module, thereby saving the cost of the function expansion module.

Claims

A method of controlling a clock signal output for controlling a clock output unit for providing a clock signal to a function expansion module inserted into a function board, the method comprising:

When the function board is powered on, detecting whether there is an inserted function expansion module on the function board;

When detecting that the function expansion module is present, performing a first control operation, causing the clock output unit to output a clock signal to the function expansion module, so that the function expansion module can work normally;

When it is detected that the function expansion module does not exist, the second control operation is performed to turn off the clock output unit.
The method according to claim 1, wherein said performing a first control operation causes said clock output unit to output a clock signal to said function expansion module, so that said function expansion module can operate normally comprises:

Determining a module type of the function expansion module;

Determining, according to the module type, a clock signal configuration corresponding to the module type;

The clock output unit is controlled to output a clock signal conforming to the clock signal configuration to the function expansion module, so that the function expansion module can work normally.
The method of claim 2 wherein said clock signal configuration comprises an operating frequency, a level type and/or a level amplitude of the clock signal.
The method according to claim 2, wherein if said function expansion module is inserted into said function board after said function board is powered, said controlling said clock output unit outputs to said function expansion module conforms to said method The clock signal configured by the clock signal enables the function expansion module to work normally:

Performing a reset operation on the function expansion module;

Configuring the clock output unit according to the clock signal configuration, so that the clock output unit outputs the clock signal conforming to the clock signal configuration to the function expansion module;

When the configuration of the clock output unit is completed, detecting whether the clock output by the clock output unit to the function expansion module is stable, and if stable, stopping the function expansion module Reset operation.
The method according to claim 1, wherein if the function expansion module is inserted into the function board before the function board is powered, the detecting whether the function expansion module is inserted on the function board further comprises:

Determining whether the function expansion module is in place, and if so, determining that the function expansion module exists; if the function expansion module is not in position, determining that the function expansion module does not exist.
A device for controlling a clock signal output, suitable for controlling a clock output unit, the clock output unit being adapted to provide a clock signal to a function expansion module inserted into a function board, the device comprising:

a detecting module, configured to detect whether there is an inserted function expansion module on the function board when the function board is powered on;

a first control module, configured to perform a first control operation when the function expansion module is detected on the function board, to cause the clock output unit to output a clock signal to the function expansion module, so that the function expansion The module works fine;

The second control module is configured to perform a second control operation to turn off the clock output unit when detecting that the function expansion module does not exist on the function board.
The apparatus of claim 6 wherein said first control module comprises:

a first determining unit, configured to determine a module type of the function expansion module;

a second determining unit, configured to determine, according to the module type, a clock signal configuration corresponding to the module type;

And a control unit configured to control the clock output unit to output the clock signal conforming to the clock signal configuration to the function expansion module, so that the function expansion module can work normally.
The apparatus of claim 7 wherein said clock signal configuration comprises an operating frequency, a level type, and/or a level magnitude of the clock signal.
The apparatus of claim 7, wherein the control unit further comprises:

a reset subunit, configured to perform a reset operation on a function expansion module inserted into the function board after the function board is powered;

a configuration subunit, configured to configure the clock output unit according to the clock signal configuration, so that the clock output unit outputs the clock signal conforming to the clock signal configuration to the function expansion module;

The detecting subunit is configured to detect whether the clock output by the clock output unit to the function expansion module is stable when the configuration of the clock output unit is completed, and stop the reset operation of the function expansion module if stable.
The apparatus of claim 6, wherein the detecting module further comprises:

a determining unit, configured to determine whether a function expansion module inserted into the function board before the function board is powered is in place, and if yes, determining that the function expansion module exists; if the function expansion module is not in place, It is determined that the function expansion module does not exist.
a function board, wherein the function board is provided with a clock output unit and a control device;

The clock output unit is configured to provide a clock signal to a function expansion module inserted into the function board;

The control device is configured to control the clock output unit, and the specific setting is:

When the function board is powered on, detecting whether there is an inserted function expansion module on the function board;

When detecting that the function expansion module is present, performing a first control operation, causing the clock output unit to output a clock signal to the function expansion module, so that the function expansion module can work normally;

When it is detected that the function expansion module does not exist, the second control operation is performed to turn off the clock output unit.
The function board according to claim 11, wherein said control means is further configured to:

Determining a module type of the function expansion module when detecting that the function expansion module exists;

Determining, according to the module type, a clock signal configuration corresponding to the module type;

The clock output unit is controlled to output the clock signal conforming to the clock signal configuration to the function expansion module, so that the function expansion module can work normally.
The function board of claim 12, wherein the clock signal configuration comprises an operating frequency, a level type, and/or a level magnitude of the clock signal.
The function board according to claim 12, wherein said control means is further configured to:

Performing a reset operation on a function expansion module inserted into the function board after the function board is powered;

Configuring the clock output unit according to the clock signal configuration, so that the clock output unit outputs the clock signal conforming to the clock signal configuration to the function expansion module;

When the configuration of the clock output unit is completed, it is detected whether the clock output by the clock output unit to the function expansion module is stable, and if it is stable, the reset operation of the function expansion module is stopped.
A computer program comprising program instructions that, when executed by a clock output control device, cause the device to perform the method of any of claims 1-5.
A carrier carrying the computer program of claim 15.