JPS6012193Y2 - Small electronic device with currency conversion rate display function - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a small electronic device that is capable of displaying currency conversion rates.

In recent years, the time difference between the current time of the reference city and the current time of the reference city is stored in advance, and when a city is specified, the time difference read out from the current time of the reference city is added to the current time of the reference city to calculate the current time of the specified city. A world clock has been developed that displays this information.

By the way, when you specify a city and display the current time in this specified city, for example, when you go shopping overseas, you may also want to know the exchange rate of the currency of the country to which this specified city belongs to the yen. .

However, conventional world clocks do not have a function to display the exchange rate, so when you want to know the exchange rate immediately when shopping or the like, you have to rely on your memory, which is not only inaccurate but also inconvenient.

This idea was devised in consideration of the above-mentioned circumstances, and its purpose is to preset the exchange rate along with the time difference, and to specify the city (country) name or time difference, the exchange rate of the currency of the designated city will be calculated. An object of the present invention is to provide a small electronic device having a function of displaying a currency conversion rate and displaying the current time of the city.

An embodiment of this invention will be described below with reference to the drawings.

FIG. 1 is a circuit configuration diagram when applied to a small electronic calculator having a clock function.

In FIG. 1, a ROM (read only memory) 1 stores microprograms that control various operations of this computer, which will be described later, and also stores various contents by being addressed by address data output from a ROM address section 2. microinstructions U1L, C0DE, lN5
Output XNA in parallel.

Microinstructions U1L specify the row address and column address of RAM (Random Access Memory) 3, and writing and reading data to and from the specified digits of the registers specified by these microinstructions U and L are performed in RAM.
3, it becomes executable.

The microinstruction C0DE is numerical data output to the arithmetic circuit 4.

The microinstruction INS is output to the instruction decoder 5, and is also decoded by the instruction decoder 5 and stored in the RAM 3 and R, which will be described later.
Various control signals such as read/write signals for AM6 are generated.

Microinstruction NA specifies the next address where the next microinstruction to be output from ROM1 is stored.
It is output to the ROM address section 2.

The ROM 3 is composed of an X register for calculations, a Y register, a time register T for storing clock data, an address register AD used as an address counter of the RAM 6, and other registers (as shown).

These registers are specified by the microinstruction U mentioned above.
XL, and data writing and reading are controlled by the read/write signal.

The data in the X register and the Y register are read out from the RAM 3 and sent to an arithmetic circuit 4, where the arithmetic circuit 4 performs a predetermined arithmetic operation.

The operation result data is then sent again to the X register, Y register, or other register in the RAM 3 and stored therein.

Note that the X register and Y register also serve as display registers, and the data in the X register and Y register is stored in RAM3.
When the data is outputted from the display unit 7, it is sent to the display unit 7 and displayed.

The time register T is periodically (for example, 1
This is a register for storing time measurement data from a time measurement operation executed once every second), and the time measurement data is sent to the display section 7 and displayed.

The address register AD is provided for addressing the RAM 6 provided for storing time differences and rates together with predetermined city numbers, and is used as an address counter.

Therefore, the data in the address counter AD is read out from the RAM 3 and sent to the arithmetic circuit 4 when the time difference and rate are set in the RAM 6 by key operations described later in the key manual section 8, and is further read out from the RAM 3 and sent to the arithmetic circuit 4. By simultaneously sending the command -%C0DE to the arithmetic circuit 4, the arithmetic circuit 4 executes a +1 operation on the address register AD, and the result of the arithmetic operation is again sent to the address register and stored therein.

The arithmetic circuit 4 executes a timekeeping operation on the timekeeping register T, which will be described later.

Further, the data and carry signals obtained when executing the judgment operation are sent to the ROM address section 2, and the microinstruction N
A is OR-added, output from the ROM address section 2 as the address data, and given to the ROM 1.

RAM 5 has a number of registers for storing the city number of the designated city, as well as the time difference and rate.

The address of the RAM 6 is designated by the contents of the address register oil when a predetermined key of the key manual section 8 is operated.

Also, read out the time difference and rate stored in RAM6,
The write operation is controlled by the read/write signal output from the instruction decoder 5.

In this case, to write the time difference and rate to the RAM 6, after entering the set mode, first specify a predetermined city number from the key input section 8, then enter the time difference and rate, and these time difference and rate will be written to the X register once. loaded, then RA
This is done by sending it to M5.

On the other hand, in this embodiment, the time difference and rate are read out from the RAM 6 by specifying a desired city number from the key input unit 8 after setting the normal mode.

The read time difference is sent to the arithmetic circuit 4, and is added to the contents of the time register T, which is also sent to the arithmetic circuit 4 at the same time, to calculate the current time in the designated city.
The data is sent to the register and displayed on the display section 7.

On the other hand, the read rate is the rate key (1m) described later.
It is sent to the Y register at the time of operation, and then displayed on the display section 7.

The key manual section 8 includes a mode switch 9, a city number designation key (value 1) 10, a time key (1□□□) 11 for inputting time and time data such as time and time difference, and a rate key (l (2) Set key (1) 13 for setting time difference, rate, etc. Number keys 14 from 0 to 9, an addition key, a subtraction key (both shown in the figure), etc.

The mode switch 9 is constituted by a slide switch, and is located at the set mode position (
SET) and a normal mode position (NOV) that specifies the normal mode.

Further, the city number designation key 10 is a key operated in combination with the numeric key 14 to input a city number.

In this example, the city number 'CIJS'C2J%'''C3 for each city of London, Paris, and New York.
Yo is given to each.

When you press the number key 14 and the city number designation key 10 (1), Ero or (2), Oka or (8), or Hi0zen, you can input the city number respectively. ing.

Furthermore, the time differences between London, Paris, and New York with respect to the reference city, Tokyo, are -9 hours, -8 hours, and -14 hours, respectively, and these time differences are calculated by setting the number key 14 and time key 11, respectively, to or (8), Edo men or (1),
It is possible to input each time difference when operating with 田, 匡 Prison 矧.

Furthermore, if the exchange rate of the currencies circulating in London, Paris, and New York to Tokyo, such as the pound, franc, and dollar, to yen is, for example, 38ψ1.45 yen, 220F,
The above rates for each city can be entered by a combination of the numeric key 14 and rate key 12. For example, in the case of London,
(8), (8), Kei, and Takumi M1 key operations.

The set key 13 is a key used in the set mode. For example, after inputting the city number, time difference, and rate using the above-mentioned key operations for London, operate the set key 13 at the end to input the X register. The time difference and rate data once input are stored in the address register D.
This is written in the area of RAM 6 indicated by the contents of .

Further, when the time key 11 is operated in the set mode, the time difference can be entered, and when operated in the normal mode, the current time of a designated city can be displayed on the display section 7.

On the other hand, the oscillator 15 generates a reference frequency signal (32,768KH
2) is constantly generated and this reference frequency signal is sent to the frequency dividing circuit 16.
send to

The frequency dividing circuit 16 is constituted by a frequency dividing counter for frequency dividing the input reference frequency signal to a signal IP/S having a period of 1 second, for example.

Then, the IP/S signal taken out from this frequency dividing circuit 16 is sent to the ROM address section 2, so that the ROM1
Then, a microinstruction is output that instructs the clock register T in the RAM 3 to perform a +1 clock operation.

That is, when the IP/S signal with a cycle of 1 second is output from the frequency dividing circuit 16, the ROM 1 outputs the microinstruction C0DE with data 11 to the arithmetic circuit 44, and the RAM 3
The contents of the time register T are outputted to the arithmetic circuit 4.

Then, in this arithmetic circuit 4, the time data obtained by adding '+IJL' to the contents of the time register T is written into the time register T again.

Next, the operating method and operation of the set mode and normal mode of the above embodiment will be explained with reference to FIGS. 2 to 6.

First, the case of entering the set mode will be explained with reference to FIGS. 2 to 4.

In this case, first set the mode switch 9 to the mode position (
SET).

And to set the London city number 'C1, time difference of 9 hours, rate of 38 協 against the pound, see Figure 2 (
As shown in 1), number key 14, city number designation key 1
0, time key 11, rate key 12, set key 13
, and a minus sign key (not shown), respectively.

When the key (1) is operated, the process shown in FIG. 4a is first executed.

In this case, the microinstruction [JX:[,,C0DE] with the contents necessary to execute the process shown in FIG. 4a above.

In order to output INS and NA from the ROM 1, address data with predetermined contents is output from the ROM address section 2 and given to the ROM 1.

As a result, the contents of RAM3 address register AD r□
J is read out and address rOJ is given to the RAM 6, and data "CIJ" representing the city number of London is written to the area of address 10, as shown in FIG.

When the above operation is completed, the calculation circuit 4 executes an operation to increment the contents of the address register AD by 1, and the data of the resulting contents r''IJ is transferred to the address register D.
is transferred and stored.

Furthermore, minus sign key, q, m flame, (3), ■, times,
When the time difference and rate are inputted by sequentially operating the ward Σ, the process shown in FIG. 4, that is, the process of once writing the time difference -9 hours and the rate 380 yen in the X register is executed.

Next, when the II key 13 is operated, the process shown in FIG. 4C is executed, and as a result, the time difference and rate written in the
It is transferred and stored in the area of address r''IJ of RAM 6 given by , and the contents of the address register oil are incremented by 1 to become r2.,I.

In this way, as shown in FIG. 3, the data rCIJ representing the city number of London, the time difference of -9 hours, and the exchange rate of 38 yen against the pound are written to the addresses r□J and rIJ of RAM 6, respectively. , is set.

The method of setting the city number, time difference, and rate for Paris and New York is the same as that for London.
All you have to do is operate the keys as shown in FIG. 3.

At this time, as shown in FIG.
2 J% r 3 yo each have the city number 1C2 of Paris
y, the time difference of -8 hours, and the yen exchange rate of 45F for the franc] are written.

Also, address r4 of RAM6. ．． The city number rC3J of New York, the time difference -H time, and the yen exchange rate of 220 yen to the dollar are respectively written in r5yo.

Next, a case where the normal mode is set will be explained with reference to FIGS. 5 and 6.

For example, when displaying the current time and rate in Paris, first the mode switch 9 is switched to the normal mode position (NOM).

Then, as shown in Fig. 5 1, operate the numeric key property and press port, enter the city number rC2J, and S □ as shown in Fig. 6
processing is executed.

In this process S1, the address detection operation of RAM6 corresponding to the input city number "C2J" is executed, and when the address r2J is detected and written to the address register AD of RAM3, this address r2J is then The address r3J is given to the RAM 6, and the data in the area of address r3J, ie, the time difference of Paris -8 hours and the rate of 6 yen for the franc, is transferred to and stored in the X register.

Next, the process of S2 shown in FIG. 6 is started, and the time difference of -8 hours is read out from the X register and given to the arithmetic circuit 4.

At the same time, the arithmetic circuit 4 also displays the current time of the reference city, Tokyo, which is stored in the timekeeping register T.
The time data of 5 seconds (see Fig. 5, 1) is transferred and given, and the arithmetic circuit 4 adds the time difference -8 hours to the above time of 1:3 x 1 to obtain the current time of 4:03 in Paris. 1 hoe is calculated.

Further, this current time of 4:03:03 is transferred to the Y register, and then displayed on the display section 7.

Next, in order to display the rate against the franc, the RATE key 12 is operated as shown in FIG. 52, and the process of S3 in FIG. 6 is executed.

In this process S3, only the rate 16 yen in the X register is transferred to the display section 7 and displayed.

Next, if you want to know the current time in Paris again, press T
When the IME key 11 is operated, the above process S2 is executed again as shown in FIG. 6, and a time difference of -8 hours is added to the current time in Tokyo, 1:31 minutes 2 The time 4:31:2 is calculated and displayed on the display section 7.

The operation method and operation when displaying the current time and rate in other cities, London and New York, can be performed in the same manner as in the case of London described above.

In the above embodiment, when reading out and displaying the preset rates of each city, first the city number indicating the city name is input, but instead of inputting the city number, for example, the time difference of that city is input and the time difference is Detect the corresponding city,
It is also possible to further detect and display the rate of the detected city.

Furthermore, although the above embodiment is applied to a small electronic calculator having a timekeeping function, it can of course be applied to, for example, a digital electronic watch, a travel watch, etc.

In short, various applications and transformations are possible without departing from the gist of the present invention.

As explained in detail above, according to the present invention, it is possible to display different times in other countries or cities other than the home country or reference city, as well as the corresponding currency conversion rate, so that when traveling abroad, etc. You can easily know the local time and the local currency exchange rate, which is very convenient especially when shopping.

[Brief explanation of drawings]

Fig. 1 is a circuit configuration diagram showing an embodiment of this invention, Fig. 2 is a diagram showing the key operation procedure in the set mode, and Fig. 3 is a diagram showing the key operation procedure in the set mode.
The figure is a storage state diagram of the RAM 5 in Figure 1, Figure 4 is a flowchart showing the contents of each process in the set mode, Figure 5 is a diagram showing the key operation procedure in the normal mode, and Figure 6 is the normal mode. It is a flowchart which shows the content of each process in mode. 1... ROM, 2...-ROM address section, 3... Song RAM, 4... Arithmetic circuit, 5...
...Instruction decoder, 6...
RAM, 7...Display section, 8...Key manual section, 9...Mode switch, 10...
・City number specification key, 11...Time key,
12... Rate key 13... Set key, 14... Set key 15... Oscillator, 16... Frequency divider circuit.

Claims (1)

[Scope of utility model registration request] A small electronic device that has a world clock function that measures and displays the time of the home country or reference city and another time of one or more other countries or cities that have a time difference from the home country or reference city by external input. a storage means for storing currency conversion rates of one or more countries or cities other than the city;
Means for selecting one of the above countries or cities by external operation, and displaying the corresponding time and currency conversion rate stored in the storage means according to the country or city selected by the selection means. A small electronic device having a currency conversion rate display function.