JPS583009A - Electric power supply controller of data processor - Google Patents

Abstract

PURPOSE:To realize low electric power, by interrupting a random processing request, receiving it, and as a result, turning on an electric power supply, immediately executing a requested processing, and turning off the electric power supply when a device becomes an idle state due to the end of the processing. CONSTITUTION:A random processing request from a user is interrupted and received, by which an electric power supply is turned on, a requested processing is executed immediately, and when the processing ends and a device becomes an idle state, the electric power supply is turned off. For instance, when a processing request from a user is generated, an interrupting signal from an external device is received by an interruption receiving part 6, an interruption receiving signal is sent to a central processor CPU1, also an electric power supply turn-on signal is sent to an electric power supply control part PC4, the electric power supply of the CPU1 and an input/output control part I/O 3 is turned on, and a program corresponding to an interruption channel is executed. Subsequently, when execution of a program whose processing has been requested ends, an electric power supply tun-off signal is sent out from the CPU1, and the electric power supply is turned off by the electric power supply control part 4.

Description

[Detailed description of the invention] The present invention is a combination device that reduces power consumption.

The present invention relates to power control devices in control circuits, sequencers, etc.

-ff, combination, -evening, etc., always 10011
There is no additional processing load, and in normal real-time processing (immediate processing), the average load is about 5 to 30%. There is a power strobe method that takes advantage of the fact that the processing load is dangerous at 1001 and cuts off the power during unnecessary times during the remaining idle time (meeting time) to reduce power consumption.

Conventionally, as this type of power saving method, a method has been used in which power is reduced by using an interval timer signal to reduce power consumption during idle time. However, in this case, the power supply tON10FF
Since the time to do this was fixed by the timer's external signal cycle, there was a big time constraint on the software that all processing had to be completed within that cycle.
Furthermore, it is not possible to handle an asynchronous processing format in which processing times are not the same, such that processing requests are generated randomly. In other words, this method requires a certain sequence of operations! It is applicable only to regular processing such as following IAI/c, and cannot be applied to complex immediate processing such as performing processing according to the priority level when a processing request is generated.

Figure xi shows a time chart in which processes A and B are sequentially processed every 20 m5. First, the power is turned on with Qms, and then the initial setting process starts, then process B, and so on in the correct order every time! All processing is completed in approximately 9 ms, and the power is then turned off. 2Qms from now
In this example, the power is turned on again later and the next cycle starts.

FIG. 2 is a block diagram of a conventional power supply control device. The shaded areas are the parts that are always ON without U N10 F F control of the power supply, 1 is the central processing unit (CPU), 2 is the memory unit (MEM), and 3Fi inputs.
fi force control ff1 (Ilo), 4 is power supply side mmtyc)
, 5 is an interval timer (TIM), the power supply in this embodiment is 0N10FF, and the interval timer 5 controls
This is done in Another method is to turn on the power using a timer and turn off the power using a 10 command or the like.

In these methods, the CPUI can only be used periodically when the stain source is turned on by a timer, and furthermore, it is necessary to decide in advance the processing order after the power is turned on. Furthermore, since there is a limit to the amount of processing within one cycle, the processing time for the software is severely restricted, and the total processing time for each cycle cannot exceed one cycle. That is, the conventional method could only target fixed processing that is extremely limited within one cycle. Therefore, when processing requests occur randomly, it is not possible to effectively save power in applications such as real-time multitasking where processing requests are managed in order of priority or time of occurrence, and the amount of processing varies in size. .

The purpose of the present invention is to eliminate these drawbacks, accept random processing requests from the user by interrupt, and thereby immediately perform the processing required when the power is turned on, so that there is nothing to process after that. An object of the present invention is to provide a power supply control device for a data processing device that reduces power consumption by turning off the power when the device is in an idle state.

According to the present invention, it is possible to configure a data processing device that can immediately respond to random processing requests generated externally and process them in a priority order according to their priority. While responding immediately to processing requests, it is possible to reduce wasted power during idle time, resulting in lower power consumption.

FIG. 3 is a block diagram of an embodiment of the present invention, in which the IFi central processing unit s, the 2fi memory unit, the 3Ifi people control unit,
4Fi power supply control unit, 6 is an interrupt reception unit (INT),
In this embodiment, when the CPU is idle, the CPU is stopped and the power is turned off.
When it becomes FF, the power supply of l103 etc. is also turned off. However, for the memory section 2, a memory element or circuit that does not lose its information even when the power is turned off and has low power consumption is used. The power control unit 4 and the interrupt reception unit 6 other than this are always powered on, but c-
By using a YOS element or the like, the power consumption can be extremely reduced.

In this power OFF state, if a processing request occurs and there is an emergency, a signal is sent to the interrupt reception unit 6 as an interrupt signal from an external device. As a result, the interrupt reception N6 sends an interrupt reception signal to the CPU 1 and also sends a power ON signal to the power supply control unit 4. Power ON sent to this power supply control unit 4
In response to the signal, the power control unit 4 turns on the power to the CPUI and l103. By turning on the power, the CPU 1 restores its internal state to the state before the power was turned off, even when restarted. When this is completed, the control program (O8) identifies the interrupt signal and executes the program corresponding to that interrupt channel. The operation of this O8 is basically the same as the conventional operation, and almost all the same components as the conventional O8 can be used.

In addition, even when a large number of interrupt signals are generated, once the power control ISA detects an ON signal from the interrupt reception unit 6, the power supply control ISA continues to control the CPU until it detects an OFF signal from the CPU 1.
It is equipped with an R/8 flip-flop that keeps the PUI power ON, so this is 0FF1! C until you receive the amount
The PU power is not turned off at YtOFF.

Figure 4 is a time chart when processes A and B issue processing requests randomly as an example of multiple interrupt processing.
10 shows the relationship between F F and immediate priority processing by the OS. It can be seen that when a processing request is issued, control is passed to the OS while the power is turned on, and thereafter the OS controls the system. When all the programs that have been processed have finished and there is nothing left to process, o
s issues a stop command, the CPUI executes this and issues a power OFF signal to the power control s4, and the stain source control unit 4 turns off the power and returns to the initial state. In this case, the priority of process B is higher than the priority of the processing unit.

At this time, it must be noted that the information in the CPU 1 will be lost if the power is turned off. If there is information that is necessary after restarting, such as status information in the CPU, even if the power is turned off before executing the stop command, that information will be extinguished and saved in the memory, and a processing request will be generated after that. , these information can be restored when the power is turned on.

In addition, in 08, it is necessary to add functions such as saving and restoring these functions and initial settings when restarting, but it is better to use firmware than to execute these parts with machine instructions. Desirable from the point of view of reduction.

As mentioned above, power reduction using the conventional 0N10FF power supply is only possible in a fixed sequence, so it cannot be applied to things where processing requests occur randomly or things that require immediate processing, and it cannot be applied to things where processing requests occur randomly or things that require immediate processing. The flexibility of creating and changing is small, and according to the present invention, it is possible to instantly respond to processing requests, even if they are random.
Real-time multiprocessing can be easily achieved with low power consumption.

For example, the processing amount is 1 ms once every 100 m1,
If the power supply is about 64 m5 at a time, the duty at 08 of the power supply is 15%, so the power consumption is 10'OW during continuous operation.
The average power consumption for this device is 1.5W, making it possible to significantly reduce power consumption. This reduction in power consumption reduces the amount of heat generated by the p-power source, so the radiator, middle cooler, etc. can be made into components, making it possible to reduce the size and weight of the device.

The scope of application of this invention is combinations mounted on portable equipment, vehicles, aircraft, rockets, artificial satellites, etc.

- controllers, control devices, sequencers, etc.

[Brief explanation of drawings]

FIG. 1 is a time chart of a conventional fixed processing sequence, FIG. 2 is a professional diagram of a data processing apparatus having a conventional processing sequence, and FIG. 3 is a four-dimensional diagram of an embodiment of the present invention. The four factors are as follows in Figure 0, which is a time chart when a random processing request occurs in the present invention: 1...Central processing unit, 2...Memory unit,
3... Input/output control unit, 4... Power control unit, 5... Interval timer, 6...
・This is an interrupt reception circuit.

Claims (1)

[Claims] An interrupt that detects a stop command in step 4 when all processing is completed and there is no longer a processing target, detects an interrupt signal input when a processing target occurs, and forms a signal to control the processing. a reception circuit; and a power supply control circuit that turns off power to circuits other than the interrupt reception circuit according to the stop command, turns on power to all circuits according to the control output of the interrupt reception circuit, and starts processing. and a power control device for data processing.