CN104409097B - A kind of utilization power detecting realizes the Low-power-consumptiocontrol control method of non-volatile asynchronous loogical circuit - Google Patents

A kind of utilization power detecting realizes the Low-power-consumptiocontrol control method of non-volatile asynchronous loogical circuit Download PDF

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CN104409097B
CN104409097B CN201410529867.6A CN201410529867A CN104409097B CN 104409097 B CN104409097 B CN 104409097B CN 201410529867 A CN201410529867 A CN 201410529867A CN 104409097 B CN104409097 B CN 104409097B
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vdd
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module
computing module
volatile
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CN104409097A (en
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赵恒�
成元庆
郭玮
赵巍胜
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Beihang University
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Beihang University
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Abstract

A kind of utilization power detecting realizes the Low-power-consumptiocontrol control method of non-volatile asynchronous loogical circuit, and this method has three big steps:Step one:Obtain Vdd monitoring signals;Need design one to monitor in real time in circuit and handle the module of Vdd fluctuations, the effect of the module is that the pressure drop that logic computing unit is switched to caused Vdd is recorded, and to amplitude and frequency sensitive, corresponding response can be made to the change of Vdd fluctuating ranges and frequency, control the decision-making of computing module closing/startup to provide foundation to change using Vdd;Step 2:Using the Vdd monitoring signals obtained in step one, the working condition whether computing module takes corresponding operation to carry out adaptive circuit is determined;Step 3:Feedback to Vdd is operated by computing module, Mobile state adjustment is entered to voltage threshold, to obtain optimal voltage threshold value.The quiescent dissipation of circuit is greatly reduced by feeding back closing/startup to control computing unit in real time in the present invention.

Description

A kind of utilization power detecting realizes the low power consumption control of non-volatile asynchronous loogical circuit Method
Technical field
Asynchronous logic electricity of the present invention based on non-volatile device (such as MTJ, memristor or phase transition storage) Road, the characteristic of different responses is carried out using asynchronous circuit, using the means of feedback control, it is proposed that one to different task circuit The Low-power-consumptiocontrol control method that non-volatile asynchronous loogical circuit is realized using power detecting is planted, it is a kind of non-volatile using device Property characteristic dynamically reduce the control method of power consumption in adjustment asynchronous circuit working cell.Belong to non-volatile low consumption circuit design Field.
Background technology
With the high speed development of integrated circuit, transistor integrated level increases sharply, and circuit complexity constantly increases, and synchronously sets Limitation and defect of the meter technology in design, manufacture and application are increasingly highlighted.Asynchronous circuit design method is used as new design Method and the supplement to synchronous design method, the study hotspot as system-on-chip designs.Compared with synchronization system, asynchronous system Because dynamic power consumption can be greatly reduced in no synchronised clock, and there is stronger robustness to the process deviation of integrated circuit, This is significant for the integrated circuit based on deep-submicron processing technology.
Semiconductor device such as MTJ, memristor and phase transition storage etc. are except low energy consumption, also with non-easy The good characteristic such as mistake and radioresistance.Their applications in integrated circuits cause design non-volatile logic circuit turns into can Energy.
Compared with traditional synchronous circuit, there is the advantage of following several respects using the asynchronous circuit of non-volatile logic:
1. asynchronous circuit uses modularized design, perform calculating task and triggered independent of clock signal, pass through each intermodule Communication transmit completion signal.Compared with synchronous circuit signal time discretization, the signal time of asynchronous circuit is continuous, signal Can at any time effectively, once signal can effectively be sent out immediately, without waiting the specific edging trigger of clock signal as synchronous circuit. The speed ability of asynchronous design is better than Synchronization Design in theory.
2. low-power consumption.The propulsion that is acted in asynchronous circuit and transmit not against timeticks, but by computing module it Between handshake interaction carry out.Whether handshake is sent out is determined by the whether effective of data, the mode of this data-driven So that circuit will not be operated unnecessarily, dynamic power consumption is significantly reduced.
3. it is non-volatile.Due to employing the device of the spin properties based on electronics in circuit, data are in computing module Storage the extra energy need not be expended to maintain, quiescent dissipation on the one hand can be greatly reduced, on the other hand can realize and be The quick startup of system.
Compared with ripe synchronous design method, asynchronous design methodologies also have the problem of some are specific.In asynchronous circuit In, because signal effective time is not discretized, the working condition at the circuit that required careful consideration during design each moment, to how The metastable state occurred in process circuit will take in.In order to realize the design object of low consumption circuit, computing module pass is provided The boundary condition for closing/starting turns into the particular problem faced in design.In order to solve this problem, the present invention utilizes power supply Voltage Vdd real-time monitoring signals, using the method for negative feedback control, to provide the optimal voltage of computing module closing/startup Threshold value, it is to avoid cause the metastable state of circuit, while realizing the design object of low-power consumption.
The content of the invention
1st, goal of the invention:It is an object of the invention to provide one kind non-volatile asynchronous loogical circuit is realized using power detecting Low-power-consumptiocontrol control method, it be use a kind of new non-volatile asynchronous circuit, based on Vdd voltage monitoring, pass through feedback To control closing/startup of computing unit in real time, the quiescent dissipation of circuit is greatly reduced.
2nd, technical scheme:In integrated circuit, supply voltage Vdd can produce fluctuation with the different of the working condition of circuit, When circuit is in underload working condition, the amplitude and frequency of this fluctuation can all reduce, on the contrary then the amplitude and frequency that fluctuate Rate can increase.Due in asynchronous circuit, circuit, can be independent of clock, and again because employing with non-by data-driven The device of volatibility, maintains data without power supply.So being turned off in computing unit idle, opened again when task arrives It is dynamic, it can very significantly reduce the quiescent dissipation of circuit.But when circuit is in high load capacity working condition, if continually closing Close/start computing unit, the metastable state of circuit is caused, bigger energy consumption can be caused on the contrary.
Vdd-tracking is a kind of real-time observation circuit supply voltage Vdd technology, by the technology, can obtain change The Vdd signals of change, this signal can as decision circuitry working condition important evidence.
A critical condition can be found, when Vdd frequency and amplitude are more than the critical condition, it is believed that circuit is in height Load operating conditions, if closing idle computing unit, are likely to result in circuit metastable state.And be somebody's turn to do when Vdd frequency and amplitude are less than During critical condition, close idle condition computing unit and cause the metastable probability of circuit to greatly reduce, then the critical condition The foundation that can be closed as computing module of judgement.Therefore, the key of problem is:Provide the side of asynchronous computing unit closing Boundary's condition, it is to avoid cause continually switch oscillating, boundary condition is provided in the form of voltage threshold.
In actual applications, because the task that circuit is performed changes, the live load of circuit also changes therewith, therefore The voltage threshold provided by Vdd signals can change because of the difference of circuit load:Voltage threshold is provided by Vdd signals, and electric Pressure threshold value determines the operation that computing module is taken, and the working condition of computing module can influence Vdd fluctuation in turn.So logical Introducing feedback control is crossed, optimal voltage threshold can be found, the target of circuit static power consumption optimum is realized.
In summary, a kind of utilization power detecting of the invention realizes the low power consumption control side of non-volatile asynchronous loogical circuit Method, this method is comprised the following steps that:
Step one:Obtain Vdd monitoring signals.As shown in Figure 1, design one is needed to monitor and locate in real time in circuit The module of Vdd fluctuations is managed, the effect of the module is that the pressure drop that logic computing unit is switched to caused Vdd is recorded, and To amplitude and frequency sensitive, corresponding response can be made to the change of Vdd fluctuating ranges and frequency, for using Vdd change come The decision-making of computing module closing/startup is controlled to provide foundation.
Step 2:As shown in Figure 1, using the Vdd monitoring signals obtained in step one, determine whether computing module is taken Corresponding operation carrys out the working condition of adaptive circuit.When Vdd fluctuation range is in threshold value, circuit working state is considered as Low load condition, now idle computing module will enter closed mode, and when needing to start the module, cooperate with unit (module of data interaction will be carried out with the module) is responsible for sending activation signal, starts the computing module closed and enters work Pattern.As shown in Figure 1, each computing unit enters before closed mode, it is necessary to store data in non-volatile device. When computing unit is activated again, data are read from non-volatile device, thus can start immediately without again from Data are loaded in external memory storage.
Step 3:As shown in Figure 2, the feedback to Vdd is operated by computing module, Mobile state tune is entered to voltage threshold It is whole, to obtain optimal voltage threshold value.The fluctuation strong correlation of adjustment and Vdd frequencies to threshold value, when frequency fluctuation change is big, threshold value It should turn down to avoid the switch repeatedly of computing module.Conversely, then threshold value is tuned up, it is to avoid frequently computing module mode of operation is cut Change.
3rd, advantage and effect:The characteristics of asynchronous loogical circuit that the present invention is constituted according to non-volatile device, supervised using Vdd Survey signal and feedback control carried out to circuit counting unit, realize the idle module of underload system completely close, heavy loaded system it is empty Not busy module selective is closed, and non-volatile computing module can keep the data before module closing.In guarantee circuit function and not Reduce on the basis of the stability of a system, considerably reduce the quiescent dissipation of circuit.
Brief description of the drawings
Fig. 1 is control principle, wherein each logic module voltage change of power supply signal detection circuit monitoring, and determining which A little circuit modules enter resting state.
Fig. 2 is feedback control flow figure.
Fig. 3 is step block diagram of the present invention
Embodiment:
See Fig. 3, a kind of utilization power detecting of the invention realizes the Low-power-consumptiocontrol control method of non-volatile asynchronous loogical circuit, This method is comprised the following steps that:
Step one:Obtain Vdd monitoring signals.As shown in Figure 1, design one is needed to monitor and locate in real time in circuit The module of Vdd fluctuations is managed, the effect of the module is that the pressure drop that logic computing unit is switched to caused Vdd is recorded, and To amplitude and frequency sensitive, corresponding response can be made to the change of Vdd fluctuating ranges and frequency, for using Vdd change come The decision-making of computing module closing/startup is controlled to provide foundation.
Step 2:As shown in Figure 1, using the Vdd monitoring signals obtained in step one, determine whether computing module is taken Corresponding operation carrys out the working condition of adaptive circuit.When Vdd fluctuation range is in threshold value, circuit working state is considered as Low load condition, now idle computing module will enter closed mode, and when needing to start the module, cooperate with unit (module of data interaction will be carried out with the module) is responsible for sending activation signal, starts the computing module closed and enters work Pattern.As shown in Figure 1, each computing unit enters before closed mode, it is necessary to store data in non-volatile device. When computing unit is activated again, data are read from non-volatile device, thus can start immediately without again from Data are loaded in external memory storage.
Step 3:As shown in Figure 2, the feedback to Vdd is operated by computing module, Mobile state tune is entered to voltage threshold It is whole, to obtain optimal voltage threshold value.The fluctuation strong correlation of adjustment and Vdd frequencies to threshold value, when frequency fluctuation change is big, threshold value It should turn down to avoid the switch repeatedly of computing module.Conversely, then threshold value is tuned up, it is to avoid frequently computing module mode of operation is cut Change.

Claims (1)

1. a kind of utilization power detecting realizes the Low-power-consumptiocontrol control method of non-volatile asynchronous loogical circuit, it is characterised in that:Should Method is comprised the following steps that:
Step one:Obtain Vdd monitoring signals;Need design one to monitor in real time in circuit and handle the module of Vdd fluctuations, the mould The effect of block is that the pressure drop that logic computing unit is switched to caused Vdd is recorded, and to amplitude and frequency sensitive, can Corresponding response is made in change to Vdd fluctuating ranges and frequency, and computing module closing/startup is controlled to change using Vdd Decision-making provide foundation;
Step 2:Using the Vdd monitoring signals obtained in step one, determine whether computing module takes corresponding operation to adapt to The working condition of circuit;When Vdd fluctuation range is in threshold value, circuit working state is considered as low load condition, now Idle computing module will enter closed mode, and when needing to start the module, data interaction will be carried out with the module Module be responsible for send activation signal, start close computing module enter mode of operation;Each calculating of the computing module Unit enters before closed mode, it is necessary to store data in non-volatile device;When computing unit is activated again, number Read, thus start immediately without loading data from external memory storage again according to from non-volatile device;
Step 3:Feedback to Vdd is operated by computing module, Mobile state adjustment is entered to voltage threshold, to obtain optimal voltage Threshold value;The fluctuation strong correlation of adjustment and Vdd frequencies to threshold value, when frequency fluctuation change is big, threshold value should be turned down to avoid calculating The switch repeatedly of module;Conversely, then threshold value is tuned up, it is to avoid frequently computing module mode of operation switches;
The non-volatile device is MTJ, memristor or phase transition storage.
CN201410529867.6A 2014-10-10 2014-10-10 A kind of utilization power detecting realizes the Low-power-consumptiocontrol control method of non-volatile asynchronous loogical circuit Active CN104409097B (en)

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US10621119B2 (en) 2016-03-03 2020-04-14 Samsung Electronics Co., Ltd. Asynchronous communication protocol compatible with synchronous DDR protocol
US10629288B2 (en) 2018-06-25 2020-04-21 Micron Technology, Inc. Adjustable voltage drop detection threshold in a memory device

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CN101910975A (en) * 2008-01-07 2010-12-08 苹果公司 The forced idle of data handling system
CN102298440A (en) * 2010-06-23 2011-12-28 英特尔公司 Memory power management via dynamic memory operation states
CN103426453A (en) * 2012-05-25 2013-12-04 华为技术有限公司 Dynamic voltage frequency scaling method and system

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CN101910975A (en) * 2008-01-07 2010-12-08 苹果公司 The forced idle of data handling system
CN102298440A (en) * 2010-06-23 2011-12-28 英特尔公司 Memory power management via dynamic memory operation states
CN103426453A (en) * 2012-05-25 2013-12-04 华为技术有限公司 Dynamic voltage frequency scaling method and system

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