Power consumption control system for electronic digital data processing devices

• US 4,293,927 A
• Filed: 12/12/1979
• Issued: 10/06/1981
• Est. Priority Date: 12/12/1979
• Status: Expired due to Term

• Current Assignee: Casio Computer Company Limited
• Original Assignee: Casio Computer Company Limited
• Inventors: Hoshii, Toshifumi
• Primary Examiner(s): Boudreau, Leo H.
• Application Number:
  US06/102,768
• Time in Patent Office: 664 Days
• Field of Search: 235/455, 235/472, 250/205, 250/568, 340/146.3 F, 340/146.3 R, 340/365 R, 365/226-229, 307/203, 307/269, 364/200 MS File, 364/900 MS File, 364/736
• US Class Current: 713/322
• CPC Class Codes: G06F 1/3228 Monitoring task completion, e.g. by use of idle timers, stop commands or wait commands

Abstract

A power consumption control system for electronic digital data processing devices is provided with a counter circuit to update a time count operation and to count a given time every time any one of the keys in the key input section is depressed. When none of the keys in the key input section is depressed before the counter circuit finishes the count of the given time, the oscillation operation of the oscillator circuit which supplies the clock pulse to the data processing device is stopped.

Claims

1. A power consumption system for electronic digital data processing devices comprising:

an oscillating circuit for producing a basis clock driving signal;

a key input section having a plurality of key switches;

counting means coupled to said key input section for updating and initiating a count operation every time any one of the key switches is operated; and

control means coupled to said oscillating circuit to cause said oscillating circuit to stop oscillating and to thereby stop producing said basic clock driving signal when none of said key switches is operated before said count means completes counting for a given period of time after initiation of said count operation.

4. The power consumption system of claim 1, wherein:

said electronic device is an electronic calculator, said electronic calculator comprising at least said oscillating circuit;

said key input section;

operation processing means including a plurality of memories for storing a plurality of data, a calculation circuit for executing various calculations and a control circuit for controlling the calculations carried out by said calculation circuit; and

a display section for displaying a result of calculation; and

said calculation processing means comprises a C-MOS logical circuit.

5. The power consumption system of claim 4, wherein said counting means is associated with said memories and said calculation circuit, and discloses a count after the processing of input data corresponding to the operation of a key switch is completed and then counts up to a predetermined value.

6. The power consumption circuit of claim 4 or claim 5, wherein said operation processing means includes means for sampling keys of said key input section simultaneously with the count operation of said counting means.

2. A power consumption control system for electronic digital data processing devices having an oscillating circuit for producing a basic clock driving signal comprising:

a key input section having a plurality of key switches;

counting means coupled to said key input section for updating and initiating a count operation every time any one of the key switches is operated;

automatic power off means to automatically cause said oscillating circuit of the electronic device to stop oscillating and to thereby stop producing said basic clock driving signal when none of said key switches is operated before said counting means counts for a given period of time after initiation of said count operation, thereby putting the electronic device in a power off state;

detecting means for detecting the first operation of a key switch after the electronic device is put into the automatic power off state; and

control means coupled to said detecting means for releasing only the automatic power off state without processing the data keyed in by said first operation of a key switch in accordance with the detected signal produced from said detecting means, and for rendering the electronic device ready for a subsequent data entering or subsequent operation.

7. The power consumption circuit of claim 2, wherein:

said electronic device is an electronic calculator, said electronic calculator comprising at least said oscillating circuit;

said key input section;

operation processing means including a plurality of memories for storing a plurality of data, a calculation circuit for executing various calculations and a control circuit for controlling the calculations carried out by said calculation circuit; and

a display section for displaying a result of calculation; and

said calculation processing means comprises a C-MOS logical circuit.

8. The power consumption system of claim 7, wherein said counting means is associated with said memories and said calculation circuit, and discloses a count after the processing of input data corresponding to the operation of a key switch is completed and then counts up to a predetermined value.

9. The power consumption circuit of claim 7 or claim 8, wherein said operation processing means includes means for sampling keys of said key input section simultaneously with the count operation of said counting means.

3. A power consumption control system for electronic digital data processing devices having an oscillating circuit for producing a basic clock driving signal comprising:

a key input section having a plurality of key switches which are operated by depression of respective keys;

counting means coupled to said key input section for updating and initiating a count operation every time any one of the key switches is operated;

automatic power off means to automatically cause said oscillating circuit of the electronic device to stop oscillating and to thereby stop producing said basic clock driving signal when none of said key switches is operated befofe said counting means counts for a given period of time after initiation of said count operation, thereby putting the electronic device in a power off state;

releasing means coupled to said key input section for releasing the automatic power off state responsive to the first operation of a key switch after the electronic device is put into the automatic power off state;

time count means for counting the key depression time of said key switch first operated after the electronic device is put into the automatic power off state; and

control means coupled to said time count means for effecting the input process designated by said first operated key switch when the depression time of said key first depressed is a given time or more, said control means not effecting said designated input process when said key depression time is less than a given time, and rendering the electronic device ready for subsequent data entering or operations when said key depression time is less than a given time.