JPS5886619A - Electronic computer - Google Patents

Abstract

PURPOSE:To facilitate operation after a power source is turned off by deciding on whether the power source is turned off by a power-off key or automatic powering-off means, and controlling the operation state of an electronic computer after the power source is turned on. CONSTITUTION:The instruction decoder and MPU controller 115 of a microprocessor unit MPU10 includes a flip-flop (F/F) for power source control internally. The F/F is supplied with a signal BFI as a reset signal with a power-on key. A set signal is outputted by deciding on whether a power-on key is operated or left in a key input waiting state for, e.g. several minutes through the MPU10. Then, driving power source on-off control is performed by the output BFO of the F/F. When the F/F is in a reset state, respective parts are powered on and when in a set state, only parts other than an RAM, display control part, and the F/F are powered off.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to electronic calculation, and more particularly to improvement of an electronic calculator having a self-power saving function, for example.

Conventionally, in order to save power, especially personal computers and programmable desktop needle bars, some devices have a function of automatically turning off the power if no key operations or horizontal bar operations are performed for a long period of time. Although this self-power saving function is effective in cases where the user forgets to turn off the power switch, there are cases where the power is turned off at random without the user's intention. For example, if the automatic power saving function is activated while a computer is running a program, the computer has to run the program from the beginning again, which is troublesome. Therefore, it is conceivable to store the operating state of the calculation immediately before the power is turned off in a memory and back up the stored contents of the memory. However, in this case, after the power is turned on, the operating state of the calculation must be returned to the initial state, and the operating state of the computer immediately before the power is turned off, which is stored in memory, must be reset to the computer. Become.

Therefore, the main object of the present invention is to provide an electronic calculation for obtaining the above-mentioned defect.

To summarize, the present invention provides an electronic calculation system including a self-off means for automatically instructing power off, and a first determination means for determining that the power has been turned off by an off key; and a second determining means for determining whether the power has been turned off by the off means, and the operating state of the electronic two-needle bar machine is determined based on the output of the first determining means or the output of the second determining means when the power is turned on. It is designed to control.

The above objects and other objects and features of the present invention will become apparent from the following detailed description with reference to the drawings.

FIG. 111 is an external view of a Votaple electronic meter*m which is an embodiment of the present invention. In FIG. 1, a computer main body 1 is provided with a display section 2 and a keyboard 3. The display section 2 is composed of, for example, a dot matrix liquid crystal display device, and is capable of displaying not only numbers but also letters and various symbols. The keyboard 3 is provided with a power off key for instructing to turn on a power source (not shown) for driving this portable electronic calculator, and a power off key 5 for instructing to turn off the telephone call. . Further, the keyboard 3 is provided with character keys, a numeric keypad, various function keys, and the like.

2nd!1. is a block diagram of the portable electronic calculation shown in FIG. 1; In the configuration, an MPU (microprocessor unit) 10 outputs a synchronization signal HA and a display 0N10FF stamp message @DISP to the display section 11, and also outputs a back plate signal @HO~7 to the display section 2.
The display control section 11 includes a display memory corresponding to each dot on the display section 2.

By writing a pit pattern corresponding to the display pattern into the display memory, desired characters and symbols are displayed. Key power @5112 is I10 port 1
A key strobe signal is input from 3, and a key return signal is output 4 to MPU 1o. The RAMs 14 and 15 are rewritable memories, and store various data, flags, or user programs arbitrarily set according to usage 1. The ROMs 16 and 17 are read-only memories, and an interpreter for executing the program and a program for controlling the values thereof are installed in advance.
a.

17 is a data bus 18. Address bus19. It is connected to the MPU 10 via a control bus 20.

The connector 21 is a connector for connecting Rin's RAM or ROM (not shown) as an expansion module, and is connected to the address bus 18. Data bus19. It is connected to the control bus 20. Further, the connector 22 is a connector for connecting an input/output device such as a data recorder or a printer or an expansion memory, and the address bus 18. data bus 19
．． It is connected to the control bus 20. Furthermore, the connector 22
is connected to the I10 boat 13. Driven by buzzer 23&t drive 111124. A control signal is applied to this drive circuit 24 from the I10 port 13. Clock generation circuit 25 includes, for example, a crystal oscillator, and outputs clock pulses to I10 port 13. ■10 boat 13 is address bus 18. data bus 1
9. - Connected to the official bus 20, t for MP and Ulo
Do the interface.

Note that the RAMs 14 and 15 and the display memory in the display adjustment section 116- are backed up and their stored contents are retained even when the main body power (not shown) is turned off.

The third cause is MPulO (for example, Sharp Corporation - (F) LH5800, LH5801) (F) Internal -
1! It is a diagram. In the figure, the MPU 10 is a register group "
101 included. This register group 101 includes a program counter P, a stack pointer S, a data register X,
Y, LJ, accumulator A, and status register T. The program counter P is a 16-pit register, which indicates the next 7 addresses of the currently executed instruction in the MPU 10SIl, and is automatically incremented by 1 when an instruction is executed and the next instruction is fetched. The stack pointer S is a 16-pit register that indicates the address of the next usable stack in the J memory bushdown or popup stack. data register x,
y and u are each 16-pit registers and are also used as data pointers. 7 Accumulator A is used to hold calculation results or to transfer data to and from external memory. The status register T stores various states such as carry, borrow, zero, and overarrow based on the calculation results. These register groups 10, 1 are address buffer 10
2 to address buses ADo' to 15. Further, an ALU (arithmetic logic unit $11111) 103 is connected to the register group 101 . This ALU103
A calculation buffer 1o4 is connected to.

In addition, MPU10 is an oscillation circuit 1 as an internal clock.
Including 05. A crystal oscillator or the like is connected to XLO and XLl of this oscillation circuit 105. Further, the output of the oscillation circuit 105 is given to a 1/2 frequency divider circuit 106. This 1/2
The output of the minute W4 circuit 106 is the clock controller 107.
and the 941 circuit 108. The clock controller 107 generates an internal clock.
Stopping is controlled according to the WAIT signal. Further, the frequency dividing circuit 108 outputs the display synchronization signal HA and also provides the timer controller 109 with its output power. Timer controller 109 outputs to timer counter 110 and interrupt controller 111, and outputs output to timer counter 110 and interrupt controller 111.
Performs 10 count and timer interrupt control. The timer counter 110 is a 9-pit polynomial counter and performs sni counting for timer interrupts.

Further, the interrupt controller 111 receives an interrupt request NMI.

Interrupt control is performed by signals output from Ml and the timer controller 109.

Furthermore, the MPU 10 includes an H1 counter 112.

The input signal HIN of the input H counter 112 is normally given the display synchronization signal HA. The output of the H counter 112 is then given to the display controller 113. This display controller 113 receives display power supplies VA, VB, VM, and VDIs, and outputs back plate signals HO to 7. MPLI 10 also includes flip-flops pu, pv, and otsp. The flip-flops pu and pv are general-purpose flip-flops, and the flip-flop DISP has a display of 0N10F9.
- It is a flip-flop for F@-.

Furthermore, the MPU 10 includes input ports INO-7, and can take in signals input from these input ports into the accumulator 8 as 8-pit data. Also, MPU10 is the data bus controller 1
14', and data buses Do to 7 are connected to this data bus controller 114. Zarani, MPU10
includes instruction decoder & MPLJ controller 11.5, and this instruction decoder &M
The PU controller 115 outputs, for example, a memory write signal R/W, memory enable signals MEO, ME1, and the like. In addition, instruction decoder & MPU
The controller 115 has an electric power S! Includes 7 lip flip-flops (hereinafter referred to as F/F) for control. It should be noted that VGG4J is a driving power source (2), and vCC is a backup power source. .

The 411th is the above-mentioned instruction decoder aMPU
3 is a diagram showing F/F included in a controller 115. FIG.

To this F/F 40, a signal @8F1 based on the operation of the on-key 10-4 (see FIG. 1) is given as a reset input signal. Also, F/F40 has 0
The FFI signal is given as a set λ power signal. That is, the F/F 40 is set by the MPU10 itself generating an OFF signal. This OFFmN is output when the MPU 10 determines that the front power off key 5 has been operated, and when it determines that the key has been left unattended, for example, for several minutes. On/off control of the drive power source is performed by the output BFO of the F/F 40. That is, F/F
If 40 is in the reset state, power is supplied to each part, and if it is in the set state, RAM 14 and 150 are displayed.
l1 part 11. Electric l only for F/F40! Supply is cut off.

FIGS. 5 and 6 are flowcharts for explaining the operation of the above-described embodiment. Below, Figures 1 to 61
1, the operation of the above embodiment will be explained.

First, the operation before the power is turned off will be described with reference to FIG. 11115. Before entering the key manual processing, time measurement is first started in step (S in the figure) 1.

This timing operation is used for self-power saving, as will be described later, and is used to check if there was any key human power in step 2. 1. If you have the key power, clear the τ meter IIIll in step 3, and step 4
At this point, it is determined whether or not the key activation is caused by the power off key 5. If the key is not pressed manually using the power off key, other keys are determined and the cough guard operation is executed. On the other hand, if the key input is from the power off key 5, in step 5, for example, the code r50~
5FJ is written into a predetermined area (hereinafter referred to as a determination area) of the RAM 14 or 15. Continuing, in step 6, the operation status l of MPLI 10! (Stored contents of the register group 101, etc.) are specially saved to the RAM 14 or 15&:.

Then, in step 7, F/F 40 is set.

By setting this F/F 40, the power supply is stopped.

On the other hand, if there is no key manpower in step 2, then in step 8 the clock time is kept constant and then the hexadecimal code rAO-AFJ is stored in the RAM 14 or 1.
5. Enter the ``kI'' discrimination area.

Thereafter, the operations in steps 6 and 7 are performed.

As mentioned above, when power off is commanded by the 1w5ii off key 5, codes r50 to 5FJ indicating this are issued.
is written into the discrimination area of RAM 14 or 15. On the other hand, when automatic power saving commands the power off, the hood "AO~^F" indicating this is displayed in RAM14 or &1.
It is written in the discrimination area at t15. Then, the operating state of the MPU 10 of the power off key is saved to the RAM 14 or 15.

In addition, in the operation shown in Figure 5, the power is automatically turned off to save power when there is no key power at a certain time. It may also be configured to turn off and automatically save power.

13- Next, when the power on key 4 is operated, the F/F 40 is reset and power is supplied to the MPU 10. depending on,
Starts execution from the start address of the program. That is, in step 61 of FIG. 6, it is determined whether the status of the peripheral devices and the storage status of the memory are the same as before the power was turned off.

That is, it is determined whether there is a newly connected memory or surrounding TIII device, or whether there is a removed memory φ surrounding @-, etc. If the state after the power is turned on is different from the state before the power is turned off, in step 61 the display s2 shows, for example, rNEWO? :Display CHECKJ. This allows the user to know that the state after the power is turned on is the same as the state before the power is turned off, and that it is necessary to make initial settings. This initial setting is, for example, FN
JrEJ rWJ rOJ rENTERJ
This is done by key operation. Note that when the battery is replaced, etc., it is not guaranteed that the stored contents of the RAM 14 or 15 will be the same as before the power was turned off, so initial settings must be made. Therefore, even if you replace the battery, step 61
will be displayed.

On the other hand, if it is determined in step 61 that the state after power-on is the same as the state before power-off, step 6
At step 3, the code stored in the discrimination area of the RAM 14 or 15 is read out.

Then, in step 64, it is determined whether the successive codes are [50-5FJ.

If the read code is [50 to 5FJ, it is determined that the power was turned off by operating the power off key 5 (therefore, the program execution mode rR is entered in step 65).
Determine whether the mode is LINJ mode 2. If the mode is other than the program execution mode, the operating state of the portable electronic calculator is initialized in step 66, and the next key input is awaited. Meanwhile, step 65
If it is determined that the program execution mode is in step 67, the operation of step 67 is performed.
> is programmed.

FIG. 7 is a diagram showing an example of a user program including the automatic start command. That is, in the user program shown in FIG. 7, automatic start commands (ARUN) are programmed in the order of the program. In step 67 described above, it is determined whether this ARUN is programmed at the beginning of the program that was being executed immediately before the power was turned off. If it is not programmed, initialization is performed in step 66 and the next key is pressed. Possess human power. On the other hand, if ARUN is programmed in the user program, initial settings are performed in step 68, and then the user program is executed from the beginning. As a result, execution of a program can be started by simply turning on the power, and key operations required in the past for executing a program can be omitted.

On the other hand, if it is determined in step 64 that the code read from the discrimination area of RAM 14 or 15 is not [50-5FJ, then in step 69 the code is [^0
~Determine whether or not you are an AFJ. If the read code is not rAo-AFJ, a display prompting for initialization is made in step 62. On the other hand, if the read code is [AO~AFJ, it is determined that the power was turned off by self-power saving, and in step 70 M
Power off the operating state of PU10 1! Return to the active layer before E. This state I! The resulting work is stored in the RAM 14 or 15 in step 6 of the 5th all.
This is done by transferring and setting the operating state of the PU 10 to the MPU 104. However, for example, if you
If some character is displayed on the display section 2 before turning off, the same display is performed in step 7.
1, it is determined whether the program execution mode is selected. If it is not in the program execution mode, it specifies the next key input, while if it is in the program execution mode, it continues to execute the program. Note that the execution of the program at this time is the same as the execution of program 17 in step 68II, and if the program has been executed halfway before the power is turned off, the program will be executed from the part where it was interrupted when the power was turned off. Continue.

As described above, according to the present invention, it is determined whether the power is turned off using the power off key or the automatic off means, and the operating state of the electronic calculator after the power is turned on is controlled. After the power is turned on, it is possible to make the electronic gauge/mechanism perform the desired operation without requiring complicated operations like in the past.

[Brief explanation of the drawing]

The first factor is an external view of a portable electronic calculator which is an embodiment of the present invention. FIG. 2 is a block diagram of the portable electronic calculator of FIG. Figure 3 shows the MPU in Figure 2.
10 is an internal configuration diagram. Figure 184 is the third! ! l instructions 1 coder &
7 is a diagram showing seven lip-flops for power III control included in the MPU controller 115. FIG. 511th and 6th
11 is an 18th flowchart for explaining the operation of an embodiment of the present invention. Figure 7 shows RAM1 in Figure 2.
4 is a diagram illustrating an example of a user program stored in 4 or 15. FIG. In the figure, 1 is the computer main body, 4 is the power on key, 5 is the power off key, 10 is the MPU, 14 and 15 are the RAM
140&t11ml@shows the official flip-flop. Patent applicant Sharp Corporation 19-

Claims (4)

[Claims] (1) a power source, a group of keys having at least an off key for commanding turning off the power source, and a command from the group of keys to turn off the power source when there is no key power for a predetermined period of time or when a predetermined operation is not performed; an electronic calculator comprising: an automatic off means for determining whether the 111i has been turned off by the off key; a second discriminating means for discriminating the operating state of the electronic calculation based on the output of the first discriminating means or the output of the second discriminating means when the pre-power distribution ■ is turned on; comprising control means;
Electronic calculation-0 (2) The electronic calculation according to claim 1, wherein the operating state--one means includes means for initializing the operating state of the electronic calculator in response to the output of the first determining means. 6 (3) The operating state I1m means responds to the output of the second determining means and causes the operating state of the nine electronic gauge rods to return to the state immediately before the power was turned off. An electronic calculator according to claim 1 or 2 of the single chain claimed in the patent, comprising one means. (4) The operating state--one means includes a storage means for storing the output of the first discrimination means and the output of the second discrimination means, and causes the storage contents of the storage means to be retained when the power source is turned off. An electronic calculator according to any one of claims 1 to 311, comprising means for.