JPS59154519A - Power source controller - Google Patents

Abstract

PURPOSE:To perform power-on control securely in response to each key input by turning on a power source repeatedly in the rising of the next key input signal when the key input is generated right before the power source is turned off. CONSTITUTION:For example, when key input signals K1 and K2 are inputted successively and a key input signal K3 is inputted with slight delay, key processing is perfored on the basis of the signals K1 and K2. When the signal K2 falls, a falling capacitor 14 is discharged abruptly to stop the output of a signal KEY' from a Schmitt trigger buffer 16 immediately. Then, even when the signal K3 is inputted, it takes a specific time for the level at a point A to reach V1, and a processing circuit 18 outputs an off signal in the falling of the signal KEY' before that, resetting an FF17. Then, the level at the point A attains to V1 to output the signal KEY', the FF17 is set again to turn on a transistor 20, and the circuit 18 is powered on, thereby performing key processing based upon the signal K3.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention has a key of 1! This invention relates to a power supply control device for electronic equipment.

[Technical background of the invention and its problems]

Conventionally, in power-saving electronic devices, such as portable electronic devices and other circuits driven by battery power, the power supply is turned off by the circuit when the key is not in operation, such as when waiting for human power.
L. The key is to power up the special power source to start the operation, thereby reducing power consumption.

Conventionally, the one shown in FIG. 1 has been known as this type of power supply control device. i.e. 1 for each key human signal,
2,...Kn through the OR circuit l to KEY (m
The D-type flip 70 block 2 is set at the rising edge 9 of the KEY signal, and the Q output of the flip-flop 2 energizes the PNP transistor 3, thereby sending the signal to the processing circuit 4. . C power is supplied. The processing circuit 4 is also input with the key input signals Kl-yKn and KEY (q) respectively.
I am resetting the J-ki Fritsuzo 70 Tsubu 2.

In such a device, for example, if the processing circuit 4 is set to output an OFF signal immediately after completing key processing, the key input signal will be 1, as shown in FIG. 2(a).
As long as 2 is inputted after a certain period of time, each key input signal is inputted to K.

When the input button 20 is set to 1, the transistor 3 is turned on, and the processing circuit 4 is supplied with the ccC signal to perform key processing. Then, each time the key processing is completed, the OFF signal resets the flip-flop 2, turns off the transistor 3, and supplies vc'c' to the processing circuit 4.
During this period, the source supply is cut off. However, as shown in FIG. 2(b), if the next key human input signal is input with a value of 2 while the key human input signal Kl is being input, the first key human input signal will rise to 1, that is, the KEY signal will rise. The key processing for that key is performed according to the key input signal, but even if there is a next key input signal, the KEY signal remains in the raised state, so the flip-flop 2 indicates that the key input signal is 1 and the key processing is completed. Even if the key input signal Kz is reset, it will not be set to the next key input signal by inputting 2, and therefore, there is a problem that key processing based on the key input signal Kz will not be performed.

For this reason, as shown in Figure 3, the output of the OFF signal is prohibited only when the KEY newsletter is held, and only after confirming that all key human input signals have disappeared and the KEY signal has fallen. If the OFF signal is output and key processing is performed by the processing circuit 4 each time each key human signal is input manually, key processing can be performed reliably even if the key human input signals partially overlap. However, even if this method is used, there is a certain delay time t in which the OFF signal is output after the Y-fold signal fall confirms p, so this time is shown by the dotted line in Figure 3. Even if there is an input of 3 in the next key human input signal, the power will not be turned on by that key human input, resulting in the inconvenience that the key 3 cannot be processed for this key human input signal.

[Purpose of the invention]

The present invention has been made to solve such problems, and an object of the present invention is to provide a power supply control device that can reliably perform power-on control for each key manually.

[Summary of the invention]

This invention controls one pillar source to turn on when the first key human power signal rises, performs key processing based on each key human power signal, and confirms that the key human power signal disappears after key processing. In the device, turn off the power supply at least after the key power signal disappears, and then immediately before the power is turned off, the next key power signal is turned off. The key lies in the power supply control device that can control the power supply to be turned on again at 9 pm when the machine is powered up.

[Embodiments of the invention]

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

As shown in Figure 4, the valley key human power Buddha @K]', K2
.

. . . Kn is taken out as a KEY signal via the OR circuit 11 and supplied to the delay circuit 12. The delay circuit 1
2 is a CR time constant circuit consisting of a resistor 13 and a capacitor 14.
It is composed of a diode 5 connected in parallel to the second resistor 13, and a Schmitt trigger N+ and F 16 that respond to the IF pressure across the capacitor 14. The output KEY' of the seam trigger buffer 16 is input to the T input terminal of the D-type fritz flop 17 and processed by the processing circuit 18. Input is being made to the input terminal. Each key human input signal KI-Kn is input to input terminals 11 to 11 of the processing circuit J8. Said F IJ, Zoflop 17 ■
) The input terminal f is connected to the vcc terminal. niJki pretend, Nofro/f77's 4111 force g+i Yako resistance 19
It is connected to the base of the PNP transistor 200 via. The emitter of the transistor 20 is (■). , and the collector of the processing circuit 18.
'jIu source input terminal. The processing circuit 18
The falling edge of the KEY ' signal from the delay circuit 12 is 9.
It is confirmed that all key inputs have been completed, and an OFF signal is output from the output terminal O to the reset terminal R of the flip-flop 17 after a certain time delay.

Next, the operation of the non-inventive embodiment constructed as described above will be described based on FIG.

For example, if the key human input signal K 3 is inputted with a slight delay from 2, the KEY signal as shown in the figure is output from the OR circuit 1 and delayed. It is input to the circuit 12. In the delay circuit 12, the capacitor 14 is charged with a fixed time constant by the input of the KEY signal, and rapidly discharged via the diode 15 by the fall of the I(EY signal).

Then, when 1/bell at point A becomes more than V, the KEY' signal is output from the Schmitt trigger buffer 16, and ■2
When it becomes below (v2kuVl), Shuminotorigapa,
The output of the KEY' signal from the sofa 16 is stopped.

That is, the Schubat trigger puffer I6 is V, = V, .
- Operates with a hysteresis pen pressure of V2. and K
The fly is set by the EY' signal, the transistor 20 is turned on, and the VCC to the processing circuit 18 is turned on.
Electric temperature is supplied, and key processing is performed based on the key manual signal. By the way, the number K
2 falls 7:) (Then, the Y-fold signal rises to 1), the content 14 is rapidly discharged, and the output of the KEY' signal from the Schmitt trigger buffer 16 is immediately stopped. , even if 3 is input to the next V-human power signal immediately after that, it takes Br constant time for the L-bell at point A to reach vl.However, before the level at point A reaches Vl. Then, the processing circuit 18 outputs an OFF signal when the KEY ' signal goes up to 9, and then the level at point A becomes V. , the KEY' signal is output, the f controller 17 is set, the transistor 2θ is turned on, and the processing N path 18 is turned on.
is supplied and the key processing based on the key human power 'lrL @ K 3 is executed. Even if the next keystroke is performed, the keystroke will not be invalidated, and the power will be resupplied reliably by the keystroke, and the key operation will be canceled.

Of course, the previous key manpower has ended, and the supply of 'turtles' is due to that? When the next key is pressed after the key is pressed, the power is turned on and the key is processed as before.

〔Effect of the invention〕

As described above, according to the present invention, no matter what timing each key is performed sequentially, 'fiJ, dI]t for each key is
on! ! il1 off iiM real control system fi
It is something that can provide <<.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing conventional example I, Fig. 2(a), (
b) and No. 31 are input/output waveform diagrams of each part in the conventional example,
Fig. 1 is a circuit diagram showing an embodiment of the present invention, and Fig. 5 is an input/output waveform diagram of each part in the embodiment. 11-21 circuit, 12...delay circuit, I7...frigf[+Sozo], J8...processing circuit, 20...PNP type trunk star. -9' Figure 1 (b): Niitsu Yuri: Figure 3 Figure 4

Claims (1)

[Claims] The power is turned on at the rise of the first key human power signal υ, and key processing is performed based on each key human power signal.
In the power control device that controls the power off after confirming that the key manual signal is no longer present after key processing,
A delay circuit is provided to delay the rise of each key human power signal by at least the time at which the power is turned on after the key human power signal disappears, and the next Even if key human power is performed, is it possible to control the dragon's power on again at the rising edge of the key human power signal? tilj control device.