JPS60163290A - Power saving device - Google Patents

Abstract

PURPOSE:To attain effective power saving corresponding to user's using status by selecting a power saving signal from plural control signals. CONSTITUTION:A magnetic recording/reproducing device 2 is connected to a controller 1 on the host side and control circuits 3-5 are turned on and off by a control signals from the controller 1 and also turned on and off similarly by a power saving signal. A signal 12 is a control signal or a signal 13 obtained by processing the control signal and any one of the signals can be selected optionally by a switch 14. A dry selecting signal, a drive selecting signal, a motor ON signal, an in-use signal, or the like is used as the signal 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a magnetic recording/reproducing device, and particularly to a power saving method suitable for system design aimed at efficient power saving.

[Background of the invention]

As shown in FIG. 1, the magnetic recording/reproducing device 2 is controlled by a controller 1 on the host side through a plurality of control signals. The magnetic recording/reproducing device 2 includes a plurality of power consumption units 6 to 8 therein, and control circuits 3 to 5 for turning them on and off, respectively. The power consumption units 6 to 8 are connected to control circuits 3 to 5 by control signals output from the controller 1.
Turn on and off through. Here, a power save signal line 10 is provided for the purpose of reducing the power consumption of the magnetic recording/reproducing device 2, and one of the control signals is used as this power save signal to save power. was.

With this method, the power save signal lO is fixed, even though there are various operating methods for the user who operates the controller l.
This has the disadvantage that it is not possible to perform the most efficient power saving in accordance with the operating situation of the user.

FIG. 2 shows a conventional example in which a power save signal 11 is used as a signal obtained by a processing circuit 9 that processes a control signal output from a controller 1, but it has the same drawbacks as described above.

[Purpose of the invention]

An object of the present invention is to improve the above-mentioned conventional technology and provide a power saving method for achieving the most effective power saving according to the user's usage situation.

[Summary of the invention]

The present invention makes it possible to arbitrarily select any one of the control signals output from the controller on the host side, the signals obtained by processing the signals, and the signals obtained by processing the first signal thereof, and use it as the power save signal. This solves the drawbacks of the prior art.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 shows an embodiment of the present invention in which only one magnetic recording/reproducing device 2 is connected to the controller 1 on the host side. Control circuits 3 to 5 are turned on and off by control signals from controller 1, and similar operations are performed by power save signal 12. The power save signal 12 is configured such that either the control signal or a signal 13 obtained by processing the control signal can be arbitrarily selected by a switch 14.

Specifically, the control signal selected as the power save signal is commonly called the drive select signal (hereinafter referred to as D
S signal), motor-on signal (hereinafter referred to as MON signal), in-use signal, etc. can be considered.

The magnetic recording/reproducing device has one host-side controller l.
In many cases, multiple devices are connected to the controller, and a daisy-chain method is widely used in which each signal output from controller 1 is connected to all the magnetic recording and reproducing devices to be controlled. ing. FIG. 4 shows an embodiment of the present invention in which two magnetic recording and reproducing devices 15 and 26 are connected in a daisy chain manner. Signal 37-40
is US signal I) 80. osl, IJS2゜0
It is 83. Further, the signal 41 is a M ON signal.

Magnetic recording/reproducing device 15: 1) SO signal 37 is true
In this case, the switch 22 is connected to enable operation. Furthermore, a switch 33 is connected so that the magnetic recording/reproducing device 26Ii, 1) becomes operable when the 81 signal 38 is true. Also, in this example, MON1g No. 41 is 1rue (in case of D, two magnetic recording and reproducing devices 1
5.26 drive motors 20 and 31 are connected so that they are turned on at the same time. Furthermore, in both of the two magnetic recording and reproducing devices 115.26, the power save signal 25.36 is transmitted to each magnetic recording and reproducing device 11 by the switch 23.34.
Vso1g No. 37 and D, which is the direct number that selects 5.26
Connected to SI signal 38. This is an example of 1) connecting the Slit signal and the power save signal according to the present invention.

By making such a connection, the DSO signal 37 becomes t
1) If the 81 signal 38 is false, the internal power consumption section 19 of the magnetic recording/reproducing device 15 to be used
~21, power save signal 24 is true (7) 7'
They are either on or off depending on the level of control signals 41 and 42 that turn them on and off, respectively. In the other magnetic recording/reproducing device 26, since the power save signal 35 is fa156, all internal power consumption parts are turned off regardless of the level of the control signals 41 and 42. Therefore, the magnetic recording/reproducing device that is not used can be made into a "4-power" Daifuku.

FIG. 5 shows that the power save signals of the two magnetic recording and reproducing devices are both activated by switches 23 and 34 to ION1g No. 41.
An example is shown below. In the case where two magnetic recording and reproducing devices are switched to the top for image use, in the embodiment shown in Figure A4, the drive motor 20,
Since the motor 31 is stopped, it takes time to start the motor before it can be switched and used, and quick switching is not possible.

Therefore, by adopting the embodiment as shown in FIG. 5, the magnetic recording/reproducing device 715, 26 is substantially inactive,
That is, in the case where the MUN signal 41 is fa156 and the drive motors 20 and 31 are not turned on, all the other parts 19 to 21 and 30 to 32 are turned off, resulting in a large increase in power. It will be possible to measure it.

FIG. 6 shows an effective embodiment of the present invention in a case where one magnetic recording/reproducing device 26 is used frequently and the other magnetic recording/reproducing device 26 is used less frequently. The power save signal 24 of one magnetic recording/reproducing device 15 is output by the switch 23 as in the embodiment shown in FIG.
The power save signal 36 of the other magnetic recording/reproducing device 26 is connected to the 9DSl signal 38 by the switch 34 as in the embodiment shown in FIG. 5 described above. Therefore, by setting the MON signal 38 to true, the drive motor 20 is operating, so the magnetic recording/reproducing device 15 can be quickly put into use according to the DSO signal 37. The power saving state occurs only when the drive motor 20 is turned off by the MON signal 41, and when the magnetic recording/reproducing device 15 is not substantially used. The other less frequently used magnetic recording/reproducing device 26 is configured as follows: 1) 81 signal 38 becomes true and 71 further power save signal 36 becomes true;
The drive motor 31 is turned on and is put into use. Therefore, unless this magnetic recording/reproducing device 26 is selected by the 081 signal 38, it is always in a power saving state, and efficient power saving can be performed.

In these embodiments, the MON signal is used as the control signal 41, but other common names such as an in-use signal or a head load signal may also be used.

〔Effect of the invention〕

According to the present invention, since another control signal can be easily selected and used as the power save signal, the most efficient power saving can be achieved in accordance with the usage conditions of the user of the magnetic recording/reproducing device. There is.

[Brief explanation of the drawing]

Figures 1 and 2 show a conventional example of the power save system, Figure 3 shows an embodiment of the present invention in which one magnetic recording/reproducing device is used, and Figures 4 to 6 show a plurality of magnetic recording/reproducing devices. FIG. 2 is a block diagram showing an embodiment of the present invention in the case of FIG. 1... Controller, 2, 15.26... Magnetic recording and reproducing device 4 A3-5.16-19.27-29... Control circuit, 6-8, 19, 21, 30.32... Power consumption section, 9... Signal processing circuit, 10, 11, 12゜25
．． 36...power save signal, 13...processed signal,
14.22,23,33.34...Switch, 20°31...Drive motor. Agent Patent Attorney Akio Takahashi Riichi ---------1 +++ ++ ---J No. 3
Figure 4

Claims (1)

[Claims] 1.a In a magnetic recording/reproducing device comprising several power consumption units, respective control circuits for controlling them, and a power save signal for operating the control circuits to simultaneously turn off the plurality of power consumption units. , one signal among control signals for externally controlling the magnetic recording/reproducing device, or one signal among processed signals obtained by processing the external control signal may be arbitrarily selected and used as the power save signal. A power-saving method for magnetic recording and reproducing devices that enables