JPH0531185B2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to data storage devices.

[Prior art and its problems] In recent years, data storage devices called so-called data banks have been put into practical use, in which data such as telephone numbers are stored in a memory in advance, and the data is arbitrarily read from this memory and displayed. There is. This type of data storage device has a system that allows you to keep secret data that you do not want others to know among the stored data so that it cannot be read out unless you enter a password such as a PIN number. There is something I did. However, in such cases, once input as secret data, it cannot be de-secreted and changed to so-called normal data other than secret data; conversely, once input as normal data, What you enter cannot be changed to secret data. Therefore, if you entered the data as secret data, but later you no longer need to make it secret and want to change it to normal data, you can clear the data that was entered as secret data, and it will be the same as clearing it. There was a problem in that it was necessary to re-enter the data as normal data, which was very troublesome when the data was long.

[Object of the Invention] This invention was made based on the above-mentioned circumstances, and its purpose is to extremely easily delete stored data as secret data without clearing or re-entering the data. In addition to making it possible to change it as normal data,
An object of the present invention is to provide a data storage device in which it can be easily confirmed that data has been changed to normal data.

[Summary of the Invention] In order to achieve the above-mentioned object, the present invention is directed to a data storage device capable of storing secret data in addition to normal data. The secret data is sequentially displayed on the display device along with a secret mark that clearly indicates that it is secret data, and the secret data displayed on the display device is changed as normal data, and the secret mark display is erased to display the data as normal data. The main point is to clearly indicate that the changes have been made.

[Example] The present invention will be specifically described below based on an example shown in the drawings. FIG. 2 is an external view of an electronic wristwatch with a data bank function to which the present invention is applied.

A keyboard 1 and a display device 2 are provided on the front face of this wristwatch. On the keyboard 1, in addition to various keys that function as alpha keys and numeric keys, there are also a page change key P that changes the content displayed on the display device 2 one page at a time in alphabetical order, and a secret data ON/OFF key.
A key SS and further cursor keys SC and SC are provided. Further, push button switches S ₁ , S ₂ and S ₃ are provided on both sides of the watch case 3. Here, switch S ₃ is a mode switch for switching between data bank mode and clock mode, switch S ₂ is a mode switch for switching between write mode and read mode of data bank mode, and switch S ₁ is a mode switch for switching between data bank mode and read mode. It functions as a mode switch for switching between a normal mode in which normal data is read out and a secret mode in which secret data is read out.

FIG. 3 shows the configuration of the display device 2. As shown in FIG. This display device 2 is composed of a liquid crystal display device,
The lower display area is provided with a main digital display section 2A consisting of an 8-digit day-shaped display.
Also, in the above display area, there is a sub-digital display section 2B consisting of a 4-digit day-shaped display from the right side of the figure.
, 5-digit matrix display section 2C, and AM
In addition to the display section and PM display body, a secret mode mark 2D is provided.

FIG. 1 shows the overall block circuit diagram of this electronic wristwatch, which operates under a microprogram control system with 8-bit parallel processing.

For example, which is constantly output from the oscillation circuit 11
The reference clock signal of 32.768KHz is frequency-divided to 512Hz by the first frequency divider circuit 12, and then the frequency is divided by the second frequency divider circuit 1.
given to 4. This second frequency dividing circuit 14 is 1/16
A carry signal a is outputted every second and given to the operation decoder 16, thereby causing a time measurement process to be executed once every 1/16 second. Also, the first
A 512 Hz signal from the frequency dividing circuit 12 is given to the timing generator 13. The timing generator 13 outputs timing signals to various circuits, and includes an operation decoder 16,
Input section 22, ROM (read-on memory) 21,
It is given to the address section 20. When the operation decoder 16 receives the carry signal a from the second frequency dividing circuit 14 or the key signal b from the input section 22, the operation decoder 16 outputs a HALT release signal c and supplies it to the timing generator 13. As will be described later, the input unit 22 has a configuration including various switches, and the switch signal output to the operation switch is
A carry presence signal b is applied to the multiplexer 17 and is outputted by operating any switch, and is sent to the operation decoder 1.
6, and thereby the switch processing program corresponding to the operation switch in the ROM 21 is addressed and the switch processing is executed.

The ROM 21 stores a microprogram that controls all operations of this electronic wristwatch, and outputs microinstructions ADDR, DO, NA, and OP in parallel.
The microinstruction ADDR is input to RAM (random access memory) 15 as address data,
It is also input to the display section 23. Also, the microinstruction DO is multiplexer 1 as a numerical code.
7 is input. The data from the input section 22, the contents of the second frequency dividing circuit 14, and the output data of the RAM 15 are also input to the multiplexer 17, which switches and outputs the operand and operand at various processing timings, and outputs the operand to the operation section 19. , temporary register 1
given to 8. In this case, the data held in the temporary register 18 is transferred to the multiplexer 1
It is provided to the arithmetic unit 19 in synchronization with the output data of 7. Further, the microinstruction NA is input to the address section 20 as next address data for reading out various microinstructions necessary for the next process, and the output of the address section 20 is given to the ROM 21. Furthermore, the microinstruction OP is data input to the operation decoder 16.

The calculation unit 19 executes switch processing, bulletin board processing, etc., and the calculation result data is sent to the address unit 2.
0 and input to RAM15. Here, the address section 20 exchanges the address of the ROM 21 by executing a match operation in the arithmetic section 19. Further, the data read into the RAM 15 is read out at each processing timing, and is input to the multiplexer 17 as well as to the display section 23.

Operation decoder 16 is a microinstruction
It decodes OP and outputs various control signals, and input section 22, address section 20, multiplexer 17,
It is given to the calculation unit 19, temporary register 18, etc. In this case, the signal d input to the input section 22 is a signal output after the switch input signal from the operation decoder 16 is taken in.
The contents of the operation decoder 16 are reset.

Figure 4 shows the main parts of RAM15.
5 contains timing data, system control data, and more.
It has a storage area that the user can freely write in according to key operations. That is, as shown in FIG. 4, the RAM 15 has a T
register, D register that stores the date, password storage section Z that stores a preset 4-digit password, data memory DM that stores a large amount of data for the data bank (normal data storage area DM _N and secret data storage area
DM _S ), this data memory A memory that stores the total number of normal data stored in DM.
N _N , a memory N _S for storing the total number of secret data stored in the data memory DM;
A normal display page pointer P _N for storing the number of display pages of normal data, a secret data display page pointer P _S for storing the number of display pages for secret data, and a flag specifying the normal mode and the secret mode are stored. a flag register F _S that stores a flag that enables password input, a counter C that counts the number of input digits of a password, an address register I that specifies the row address _of the data memory DM, and a numeric register X. , and a storage register Y are provided.

Note that the data memory DM is assigned a row address starting from "1", and the areas DM _N ,
The first digit _MP of each row of the _DMS stores a flag indicating whether the data written on that page is secret data or normal data.

In this embodiment, the secret data storage area _DMS and the normal data storage area _DMN store phone numbers required by the user, and phone numbers that the user does not want others to know are stored as secret. Data storage area _DMS , other telephone numbers are written in normal data storage area _DMN . The data written in both storage areas consists of a name (four alphanumeric characters) and a telephone number (area code, area code, number) on one page, and is edited and stored in alphabetical order of the name.

Next, the operation of this embodiment will be explained with reference to FIGS. 5 to 9. Here, FIGS. 5 to 8 are flowcharts for explaining the operation, and FIG. 9 is a diagram of display states that change with switch operation.

First, an overview of the overall operation will be explained with reference to the general flow shown in FIG. In step S1, the system enters a standby state HALT until a clock timing or key input occurs. Then, when the 16Hz clock clock is output from the frequency divider circuit 14, the step
Proceeds to S2, and after the timing process is executed, the step
Return to S1. Further, when a key presence signal is input from the key input section 22, a corresponding key processing program is designated, key processing is executed (step S3), and then the process returns to step S1.

FIGS. 6a and 6b are flowcharts showing specific details of the key processing (step S3) shown in FIG. First, in step S4, the key code corresponding to the operation key is set in the number register X. After that, the set key code is determined and processing is performed according to the key code.If switch _S3 is operated to switch from watch mode to data bank mode, the process will be executed in step S5. This is detected, and since the mode is now the clock mode, this is determined in step S6, and the mode is switched to the data bank mode (step S7). Next, the page in the normal data storage area DM _N that was last read last time is the normal display page pointer P _N
The address is specified by , and the data of this page is displayed (step S8). In other words, the switch
When you operate _S3 to switch to data bank mode, the normal mode of data bank mode is automatically set. If the page change key P is operated here, steps S45 to S45 in FIG. 6b, which will be described later,
Through the process of S47, the data stored in each page of the normal data area _DMN in alphabetical order is sequentially displayed on the display device 2 in that order for each operation. A in FIG. 9 shows the change in display at this time. By the above operations, all pages in the normal data storage area _DNM can be searched, including pages that are displayed blank.

Next, a case will be described in which the normal data read operation as described above is shifted to the secret data read operation. In this case, operate switch _S1 . This operation of switch _S1 is detected in step S29, that is, from step S4 to step S5.
Proceed to step S5, and if NO is determined in step S5, proceed to step
Proceed to S14. In step S14, it is determined whether the mode is data bank mode or not, and the step S14 described above is executed.
Since the data bank mode is set in S7, the process advances to step S15, where it is determined whether or not the F _P flag is 1, that is, whether or not the password can be input.Since the password input is not possible yet, the process advances to step S29.
Then, it is determined whether or not switch _S1 was operated. Then, in the next step S30, it is determined whether or not it is in the read mode, and the next step is started.
In S31, it is determined whether the contents of the flag register F _S are "0". Here flag register F ₃
indicates that it is in secret mode when it is "1", and indicates normal mode when it is "0". Since it is still in normal mode when switch _S1 is operated, the next step is not possible.
Proceeding to S32, the flag register F _P is set to "1". As mentioned above, the flag register F _P is set with a flag indicating the state in which password input is possible.When it is "1", it is in the state in which password input is possible.
When it is "0", input prohibition is displayed. After setting this flag, the display section 2 displays a password input enabled state (step S33). b-1 in Figure 9 shows this display, including a display commanding password input (No.?) and an input digit (4
A cursor display (-) indicating the digit) is displayed, and the cursor display of the digit to be input from now on blinks. Next, you will need to use the numeric keypad to enter your password. When the password is manipulated, it is detected in step S16, and the manipulated code is transferred from register X to register Y (step S17). Next, the value of counter C is “4”
It is determined whether the value has been reached (step S18).
In the first operation, the value of the counter C becomes "1" in step S25, which will be described later, and therefore the process advances to step S19. Now add 1 to the value of counter C
The increment process is executed, and the value of the counter C becomes "2". After that, the input number, that is, the first digit of the password, will be displayed at the display location, and
Furthermore, the cursor for the second digit, which is the next input digit, blinks (step S20). Thereafter, the same process is repeated when the second and third digits are input, and when the fourth and final digit is input, that input code is input into register Y (step S17).
After that, since the counter C has already reached "4", the process advances from step S18 to step S21, and the fourth digit number is displayed. Then, the contents are compared between the register Y, where the entered 4-digit number is set, and the password storage section Z, where the password has been set in advance, and it is determined whether the passwords match (step S22). When they match, the flag register F _S is set to “1”.
is set (step S23). That is, when the process reaches step S23, the normal mode is automatically switched to the secret mode.

At this point, there is no need to enter any more passwords, so a flag register indicating this possibility is used.
F _P is set to “0” (step S24), and furthermore,
The value of counter C is returned to “1” (step
S25). The message that the passwords match (OK in b-2 in Figure 9) continues for 2 seconds, and then
Among the data in the secret data storage area _DMS , the data stored in the page designated by the secret data display page pointer _PS is displayed (steps S26, S27). Here, when the page change key P is operated, the data of each page in the secret data storage area _DMS is changed to the ninth page in the same way as when reading the normal data storage area DM.
The steps are read out sequentially as shown in Figure c.
S45, S46, S47). Also, here again Switch S ₁
When operated, the process goes from step S29 to step S30 to step S31, and since the value of the flag register F _S is "1", the process proceeds from step S31 to step S34, and the value of the flag register F _S is set to "0". to return to normal mode. Next, a process of displaying normal data on the display device 2 is performed (step S35).

By the above operations, the data stored in the data bank can be freely read out whether it is normal or secret.

Next, a case will be described in which new data is written to a page in which no data is stored yet. In this case, in the data bank mode and in the read mode, operate the page change key P to search for a page that has not yet been written, and turn the display device blank, for example, as shown by B and B in Figure 1. Display it, then operate Switch S ₂ .

When switch _S2 is operated, the data bank mode is detected in step S14, and then step S36 is entered via steps S15 and S29.
It is detected that switch _S2 has been operated. Upon this detection, the process advances to the next step S37, where conversion between the write mode and the read mode is performed.Since the read mode is currently in effect, the process moves to the write mode. Therefore, step S38 leads to step S41. After detecting that the display device 2 is blank, it is determined whether the display device 2 is currently in the secret mode or the normal mode (step S42). Next, when in secret mode, the memory N _S that stores all the secret data is incremented by 1 (step S43), and when in normal mode, the total number of normal data is stored. An increment process is performed to increment the memory N _N by 1 (step S44). After that, a write operation begins, but if there is an operation to operate the cursor key SC in order to specify the position to display letters and numbers with the cursor before inputting them, this is detected in step S53. After confirming that the cursor is in the write mode (step S54), the cursor is moved to the indicated position (step S55). In this way, when you write the first character of the data to be written using the numeric keypad or alphanumeric key, the character will be displayed at the cursor position after confirming that it is in write mode (step S56). At the same time, it is stored in a predetermined digit of a predetermined page in the data storage area DM (step S57). The above operation is repeated for each character to write one piece of data.

After the above write operation is completed, to return to the read mode again, operate switch _S2 again. After this operation is detected in step S36, the mode is switched to readout mode (step S37), and the next step is started.
Proceed to S38. In this step S38, it is determined whether the mode is read mode or write mode, but since the mode has now been changed to read mode in step S37, the process advances to step S39 and editing processing is executed. This process is a process of adding newly written data and arranging the data in the data memory in alphabetical order, and this process will be described in detail later. After this editing process, the first page data in the current mode (secret or normal) is displayed (step
S40).

Next, the case of transferring already stored data to another data storage area, that is, the case of changing normal data to secret data, and changing secret data to normal data, will be described. The page change key P is operated to display the symmetrical data to be transferred on the display section 2. In this case, when the data to be transferred is secret data, the secret mode mark 2D is displayed as (ⓓ), and when it is normal data, this mark disappears. Next, operate switch _S2 to switch from read mode to write mode. That is, the operation of switch _S2 is detected in step S36, a process of switching to the write mode is performed in step S38, and furthermore, it is confirmed in step S41 that the display device 2 is not in a blank display. d-1 in Figure 9 is the CARIO which was the secret data.
This shows the display state when changing the data to normal data.

Next, operate the secret ON/OFF switch SS. This operation is detected in step S48, and after confirming that the program is in write mode (step
S49) Data to be transferred is written (i.e. supported by display page pointer P _N or P _S )
The flag M _P in the first digit of the page is inverted (steps S50, S51, S52). In other words, when converting secret data to normal data,
Change the value of M _P from “1” to “0” and vice versa,
To make normal data secret data, change the value of M _P from "0" to "1". Note that when normal data is changed to secret data by operating the secret ON/OFF switch SS, the secret mode mark 2D is displayed, and in the opposite case, this mark that was displayed until then disappears. d-2 in Figure 9 shows the state in which this mark has disappeared, and only the mark disappears from the state in Figure 9 d-1 where the mark was displayed, indicating that the secret data has been changed to normal data. is immediately obvious. After completing the above operations, press the switch again to return to read mode.
When _S2 is operated, this is detected in step S36 and switching to read mode is performed (step S37), and after confirming that the read mode is set (step S38), the next editing process (step S38) is performed. The process will proceed to step S39). The details of this editing process will be described later, but by this process, the data to be transferred is transferred to the destination data storage area and arranged in alphabetical order.

In addition, when returning from data bank mode to clock mode, operate switch _S3 . This will be detected in step S5 and the process will proceed to step S6. In this step, it is determined whether the device is in the clock mode or the data bank mode, but since it is still in the data bank mode, the process advances to step S9. Here, it is determined whether the mode is read mode or write mode, and in the case of write mode, it is invalidated. That is, in this embodiment, it is impossible to return directly from the write mode to the clock mode. In the read mode, in step S10, the flag register F _P indicating a password input enabled state is cleared, and in step S11, the flag register F _S indicating the secret mode is cleared. That is, these registers are initialized. Thereafter, a process of switching to the clock mode is performed (step S12), and the process proceeds to a clock display process of step S13.

Next, the page change process in step S47 mentioned above will be explained in detail with reference to FIG. First, it is determined whether the secret mode is the normal mode (step S60). If you are currently in incognito mode, the incognito display page pointer
A comparison is made between the number of pages set in _PS and the contents of the memory _MS that stores the total number of secret data (step S61). If the number of displayed pages is less than the total number of data, that is, the data being displayed is not the last data stored in the secret data area _DMS , the secret display page pointer _P An increment process of adding 1 is performed (step S62). As a result of this processing, it is determined whether the value of the secret display page pointer _PS has become larger than the total number of secret data (step S63). If it is not greater than the total number of secret data, the data of the page indicated by the secret display page pointer P _S is displayed on the display device 2 (step 64), and if it is greater than the total number of secret data, the data of the page indicated by the secret display page pointer P _S is displayed. Since the page designated by is a page that has not yet been written, the display device 2 displays a blank display (step S65). Furthermore, if it is determined in step S61 that the value of the secret display page pointer P _S is greater than the total number of secret data, the process proceeds to step S66.
In step S64, the secret display page pointer P _S is set to "1" and the data of the first page is displayed. In this way, the steps
It is determined in S61 that the value of the secret display page pointer P _S is greater than the total number of secret data when the page change key P is operated once again after the blank display in step 65 is made. For this reason, if you repeatedly press the page change key P, the data will be displayed in the order of arrangement, and after the last arranged data is displayed, it will be blank only once, and then it will be arranged again at the beginning. The current data will be displayed. That is, the display is performed cyclically.

If it is determined in step S60 that the mode is in normal mode, the process advances to step S67, where the same processing as in the case of secret mode is performed, and the display returns to normal data (step S70) or blank display (step S71). reach.

Next, the editing process at step S39 will be described in detail with reference to FIG. First, processing is performed to set a desired address "1" in address register I (step S81). Then, in the normal data storage area D _N , the flag M _P (this is referred to as M _NI ) in the first digit of the page whose row address is indicated by the value of the address register I is "1".
It is determined whether the current state is the same (step S82).
Note that this flag indicates that the data on that page is secret. Now, since the contents of the address register I are "1", the flag M _N1 of the page where the first normal data is stored is checked, and if it is not "1",
That is, if it is not specified that this normal data should be transferred to the secret data storage area, the process advances to step S87, and the address register I is incremented by +1. Now, since the address register I was 1, it becomes 2 by this process. Next, it is determined whether the value of the address register I after the increment process has become larger than the total number of normal data (step S88). If it has not become larger, return to step S82. Then, it is checked whether the flag M _N2 of the page with the row address "2" is set to "1", and if it is not set to "1", the process advances to step S87. Below is the flag register
The same process is repeated as long as _MNI does not become "1". If the flag register _MNI has become "1" after repeating the process several times, the process advances from step S82 to step S83, and the data of this page is stored in the secret data storage area _DMS.
The data is transferred to address N _S +1, that is, the next page at the end where the secret data is lined up. Next, as a result of this transfer, the number of data in the normal data storage area decreases by "1" and the number of data in the secret data storage area increases by "1", so those processes are stored in the memories N _N and N _S. is carried out (steps S84, S85). And the steps
In S86, processing is performed to fill the normal data storage area with data in order to fill in the pages that became blank as a result of the transfer, and then the step
The process advances to S87, and the above-mentioned processing is performed. After the above processing is repeated, if it is determined in step S88 that the value of the address register I has become larger than the total number of normal data, the process advances to step S89. The processing up to now is the processing for transferring data in the normal data storage area to the secret data storage area, but steps S89 to
The process of S96 is the opposite, and is a process for transferring data in the secret data storage area to the normal data storage area, and is the process of steps S81 to S81.
Processing similar to that of S88 is performed.

FIG. 9e shows the state after the data in the secret data storage area has been transferred to the normal data storage area. That is, this corresponds to the state after the process of step S91 in FIG. Therefore, the CARIO data to be transferred is no longer in the secret data storage area _DMS , and even if the page change key P is operated, it cannot be displayed as long as the CARIO is in secret mode. Can not. Furthermore, due to the process of filling up the memory pages in step S94, no blank display remains when CARIO data is received.

Following the above step S96, processing for rearranging the data in the normal data storage area in alphabetical order (step S97) and processing for rearranging the data in the secret data storage area in alphabetical order (step S98) are performed. FIG. 9f shows the display state when the display state of the secret mode shown in FIG. _9e is changed to the normal mode by operating the switch S1. By operating the page change key P, the CARIO data transferred from the secret data storage area to the normal data storage area can be read out between the ABE and SATO data, so that the data is transferred and then rearranged in alphabetical order. You can further confirm that the

In this way, in this embodiment, by operating the secret ON/OFF key SS in the data bank write mode, the display device 2
In order to transfer the data displayed in , to another data storage area, for example, put it in the secret data storage area, and mistakenly put the data that should be secret data in the normal data storage area.
When the data is set to normal data, it can be modified very easily. Furthermore, after the above transfer, the stored data is arranged in alphabetical order, which makes retrieval of the stored data extremely easy. Moreover, only data that can be read can be specified as data to be transferred, so it is possible to prevent someone who does not know the password from changing the secret data to normal data and reading it without entering the password. , the confidentiality function is not compromised. Furthermore, when changing from secret data to normal data, the secret mode mark is erased, so that it can be immediately recognized that the change has been made. Furthermore, when changing from normal data to secret data without fear of compromising the confidentiality function, the operation can be easily performed without requiring the input of a password.

Note that the present invention is not limited to the above-mentioned embodiments, but can be modified and applied in various ways without departing from the scope of the present invention.

[Effects of the Invention] As explained in detail above, this invention makes it possible to store secret data as normal data without clearing or re-entering it. If you store it as
Alternatively, if you have entered secret data but later wish to change it to normal data, it is not only effective in making it extremely easy to change it, but also allows you to change it from secret to normal by entering a password. Since this is made possible for the first time, a person who does not know the password is prevented from changing the secret data to normal data and reading it without entering the password, and the confidentiality function is not compromised.

Furthermore, since the change from secret data to normal data is made by displaying and erasing a mark, it is possible to know with certainty that the change has been made.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a block circuit diagram of this embodiment, FIG. 2 is a plan view of its external appearance, and FIG. 3 is a configuration diagram of the display device shown in FIG. 2. , Fig. 4 is a main configuration diagram of the RAM shown in Fig. 1, Fig. 5 is a general flowchart showing an overview of the overall operation, and Figs. 6 a and b are details of the key processing shown in Fig. 5. FIG. 7 is a flowchart showing the specific contents of the page change process shown in FIG. 6b, and FIG.
FIG. 6b is a flowchart showing the specific contents of the editing process, and FIG. 9 is a diagram showing the display state that changes with switch operation. 1...Keyboard, 2...Display device, 15...
RAM, 16...Operation decoder, 21
...ROM, 22...Input section.

Claims (1)

[Claims] 1. A data storage means for storing a plurality of normal data and a plurality of secret data, and a reading device for sequentially reading out only the plurality of normal data among the plurality of normal data and the plurality of secret data stored in the data storage means. a switch means, a display device for sequentially switching and displaying the plurality of normal data read out by the reading switch means, a password data storage means for storing password data, and a password data storage means for storing password data; Display control means for switching and displaying the plurality of secret data stored in the data storage means on the display means together with a secret mark indicating that the data is secret data when the same data as password data is input. and when the secret data is being displayed together with the secret mark by the display control means, the displayed secret data is read out by the readout switch means and is switched and displayed on the display device. A data storage device comprising: data changing means for changing to normal data; and erasing means for erasing the display of the secret mark by the change by the data changing means.