JP2577531Y2 - Memory backup device - Google Patents

Description

[Detailed description of the invention] [Technical field of invention]   The invention protects the contents of the memory section in the device when replacing the battery
And a memory backup device. (Prior art)   Fig. 12 shows an example of a conventional memory backup device.
You. In the figure, a main circuit 1 including a CPU and the like,
Reading and writing of data based on the instruction of path 1
Is normally performed, for example, when the 1.5V battery 3
It is driven by the voltage supplied from it. On the other hand, RAM2
When the backup capacitor 4 is connected in parallel
In addition, a die for preventing backflow is provided between the capacitor 4 and the battery 3.
Aether 5 is connected. The capacitor 4 is normally
The battery 3 remains charged, but the battery 3 needs to be replaced.
At times, by supplying a discharge voltage to RAM2, RA
To prevent the contents of M2 from being erased for a certain period of time
It has become. [Problems of the prior art]   In the conventional backup device described above, the backup
All data to be stored is stored in RAM2 and
To access RAM2 to read / write data.
And However, the amount of data to be protected is
If the memory capacity of RAM2 is large,
At the time of access, a desired address is
It takes time to read and write by specifying the
Not only does the circuit become more complex, it also consumes more power
Had the disadvantage of   Therefore, a memory is provided in the main circuit 1 separately from the RAM 2.
Keep in mind that frequently used data is stored in this memory.
It is conceivable to read and write by storing
However, in this case, the memory in the main circuit 1 is used when the battery is replaced.
Will not be backed up, so if data is lost
There was a drawback. [Purpose of the invention]   The present invention has been made in view of the above circumstances, and has a battery exchange.
Memory that is backed up when
Data in the memory to be backed up
Data for data that is not backed up
In a device that performs the functions of
Data in memory that cannot be backed up has disappeared
Also, a memory bag that can execute specified functions after battery replacement
It is intended to provide an up device. [Key points of the invention]   In order to achieve the above object, the present invention
Backup voltage is supplied from the auxiliary power supply when
A first memory to be stored and stored in the first memory
Data related to existing data and unrelated data
Voltage supply is cut off when battery power is removed
In a device provided with a second memory,
The specified member is moved from the specified position to make it replaceable.
After the battery has been replaced and the battery has been replaced,
Detecting means for detecting the return to the position is provided.
That a given member has been moved from a given position by means
Is detected, the number stored in the second memory is
Only the data related to the data in the first memory is stored in the first memo.
To the first memory after replacing the battery power.
To return the data in the second memory to the second memory
The point that was done is the main point. [Example]   Hereinafter, embodiments of the present invention will be described with reference to the drawings.
explain.   FIG. 1 shows a data bank to which an embodiment of the present invention is applied.
1 is an overall circuit diagram of an electronic wristwatch with functions. First, Figure 1
The configuration and operation of the present embodiment will be schematically described using
You.   In FIG. 1, a replaceable 3V power supply
Pond (eg lithium battery) 11, reduces this battery voltage by half
Step-down circuit (for example, Voldi Harbor)
Voltage and receive a lower voltage (here -1.25V
The constant voltage circuit 13 that outputs
A voltage detection circuit 14 and the like for detection are provided. Battery 11
The ground side is grounded, and this ground level V₀(= 0)
And the negative voltage level (ie,
Battery voltage) to V_Two(= -3V). In addition, the constant voltage circuit 13
Constant output voltage level of V₁(= -1.2V).   Voltage V above₁Thereby, the main circuit unit 15 is driven. This
Main circuit portion 15 includes a ROM, a small-capacity RAM, and the like inside.
A clock circuit that counts and displays the time.
Other features include an alarm function and a step watch function.
Indicates various data stored in the memory unit 16 (for example,
Function to read and display phone number data, etc.)
It also has. The main circuit 15 has a small capacitor C₀But
Connected in parallel, the moment of power supply due to vibration or other
If there is any fluctuation or interruption,₀Discharge of
The operation of the main circuit section 15 can be compensated by voltage.
You. Note that the specific circuit configuration and operation of the main circuit section 15 are described below.
Details will be described later with reference to FIG.   The memory unit 16 has a large capacity for storing various data.
FIG. 2 shows a schematic configuration of the RAM. Shown in the figure
Memory section 16 stores items such as names and characters.
An item data storage area Xa capable of storing data for six characters,
Stores 12 characters of corresponding numeric data such as telephone numbers
For example, 50 records composed of possible numerical data storage areas Xb
Xista X₀, X₁, X_Two…) And when replacing batteries
Data transferred from the main circuit unit 15 (for example,
Register for temporarily storing the number of used X
Y (Y₀, Y₁, Y_Two…). Returning to Fig. 1, note
The rear section 16 is used as an auxiliary power supply for backup when replacing the battery.
Capacitor C₁Are connected in parallel.
Is the capacitor C of the auxiliary power supply₁Memory section 16 with the discharge voltage of
Can be compensated for.   The voltage control unit 17 includes a voltage Vx supplied to the memory unit 16.
Control the capacitor C₁Along with the contents of memory 16
This is a control circuit for protection. That is, the voltage control unit 17
Is a switch S described later₁Open / close and output from main circuit 15
Voltage V according to the signal a, AC, etc.₁, V_TwoSwitch to each other
This is supplied to the memory unit 16 as the voltage Vx. Also,
Chip enable signal CE that enables the memory section 16 to operate_Two
And when reading and writing data to the memory unit 16
Read / write signal R applied to_TwoAnd control each
The signals are given to the memory unit 16 as the signals CET and RT. Voltage controller 17
FIGS. 5 and 6 show the specific configuration and operation of FIG.
It will be described later based on   FIG. 1 shows a switch which is turned on when the battery is replaced.
S₁, Each part was initialized (for example, the memory part 16 was cleared)
Operation of the main circuit section 15 after battery replacement
AC switch S_Two, And the main circuit section 15
Operation data input or control command
Operation switch group S_ThreeIt is shown. Of these, in particular
Switch S₁And S_TwoThe specific configuration of
This will be described below. Here, FIG. 10 shows the application of this embodiment.
FIG. 11 (a) is an enlarged sectional view of the electronic wrist watch,
(B) is the switch S in FIG.₁Main part expansion about
It is sectional drawing.   First, in FIG. 10, the watch
A total glass 22 is attached, and a clock module inside
23 is accommodated, and a back cover 24 is attached to the lower part. Time
The total module 23 is located between the upper housing 25 and the lower
And an LSI (not shown) having the circuits shown in FIG.
And a circuit board 27 on which the
A liquid crystal display panel is mounted above the plate 27 through an interconnector 28a.
A structure arranged to supply a display drive signal to the
It is good. The above upper and lower housings 25 and 26 are thin
Mutually via the circuit board 27 by the ground plate 29 made of a metal plate
While being fixed, via the retaining ring 30 separate from the back cover 24
And is mounted in the watch case 21. FIG. 10 shows
Although not shown, the lower housing of the watch module 23
The battery 11 shown in FIG.
Is connected to the main plate 29. That is, the ground plane
29 voltage levels are V₀(Ground level).   Now, the switch S shown in FIG.₁Figure 10
Is provided in the lower right corner of the watch module 23 as shown in FIG.
11 As shown in Fig. (A) and (b),
On and off according to the opening and closing of the holding ring 30
It is configured. That is, first, as shown in FIG.
A stepped through hole 26a is formed in the lower housing 26.
The coil spring 31 having conductivity is arranged therein.
ing. The free end 31a of the coil spring 31 has a fixed end 3
It is formed in a spiral shape larger than 1b, and the free end 31a is
The fixed end 31b is disposed on the large diameter side of the through hole 26a, and the fixed end 31b is
And the fixed end 31b is connected to the circuit board.
Electrode terminal of plate 27 (input terminal to voltage control unit 17 in FIG. 1)
It is connected to the. Also, at the free end 31a of the coil spring 31
Is made of a thin conductive metal plate,
Terminal plate 32 is attached, and this terminal plate 32
Up and down the large diameter side of the through hole 26a while receiving the urging force of the spring 31
It is possible to move to. At the periphery of the terminal plate 32,
The contact portion 32a is bent so as to project slightly downward from
The contact portion 32a when the terminal plate 32 moves downward.
Are brought into contact with the main plate 29. Furthermore, the terminal board 32
Above the contact portion 32a on the side opposite to the contact portion 32a.
To the lower housing 26
Hook outward so that it is located above the step 26b
A folded position regulating portion 32b is formed, and the main plate 2
9 is removed, the position regulating part 32 is locked to the step 26b.
As a result, the terminal plate 32 and the coil spring 31 fly outside.
It can be prevented from being put out. Also on the main plate 29
When a circular hole 29a is formed corresponding to the coil spring 31,
Both are inserted into the hole 29a on the inner surface of the holding ring 30
The pressing portion 30a is provided so as to protrude at a possible position.   Switch S having the above configuration₁The battery 11 is in the lower housing
Normal state with the holding ring 30 mounted inside the ring 26
In this state, as shown in FIG.
30a protrudes inside through the hole 29a of the base plate 29, and the terminal plate 32 is
Since it is pressed against the coil spring 31, the contact portion of the terminal plate 32
32a (terminal S in FIG. 1)₁The ground plate 29 (corresponding to b)
S₁a), and is turned off. one
If you remove the retaining ring 30 for battery replacement,
As shown in FIG. 11 (b), the terminal plate is
32 is urged downward, so that the contact portion 32a contacts the main plate 29.
Then, it is turned on.   Another switch S_TwoIs also shown in Figure 10.
As shown in FIG. That is, below
A through hole 26c is formed in a part of the housing 26,
The main circuit part shown in FIG.
When an electrode terminal 27a, which is an input terminal to 15, is provided,
Then, a small-diameter hole 2 is provided at a position corresponding to the through hole 26c of the base plate 29.
9b is formed. Furthermore, the above of the holding ring 30
A hole 30b is also formed at a position corresponding to the through hole 26c.
AC switch S configured in this way_TwoIs the electrode 27a (first
Terminal S in the figure_Twob) and ground plate 29 (terminal S in FIG. 1)_Twoa to phase
Is turned on by conducting the current with a jig (not shown).
State, otherwise it is off.   Next, the specific circuit configuration and operation of the main circuit section 15 will be described.
A description will be given based on FIG.   ROM41 is a microprogram that controls each function.
This is a fixed memory with built-in memory and data.
Signal A, various data D, program designation to
Signal I for performing the following and the next address
Is output. ROM system
The control unit 42 receives the next address signal N from ROMI,
The output of the path 45, the output of the instruction decoder 44,
ROM 41 is controlled based on the output of pressure detection circuit 14 (Fig. 1)
I do. The RAM 43 has a smaller capacity than the memory unit 16 shown in FIG.
Read / read based on the address signal A of the ROM 41.
A memory for storing data that is frequently accessed for writing.
Mori. The RAM 43 stores a table as shown in FIG. 4, for example.
Display register D for storing display data, storing time data
Time register T to store alarm time data.
Alarm time register A, stores stopwatch data
Stopwatch register S and other various registers
N, i, P₀, P₁And various flags M and F₀, F₁, F_TwoComposed of etc.
Have been. Where register P₀Is stored in the memory unit 16
The number of data (ie, the register shown in FIG. 2)
Register number)₁Is the current
The address of the currently specified data is stored.   The instruction decoder 44 is a ROM 41
Decodes the control signal I and controls each block.
This is a block that sends a rule signal. Arithmetic circuit (ALU) 45 is R
OM41, RAM43, data sent from the memory unit 16, etc.
Performs an arithmetic and logic operation, and stores the operation result in the memory unit 16 and RAM4.
3. Send to ROM control unit 42, etc.   The oscillator 46 generates a clock signal having a fixed period, and
The signal is output to the scaling generator 47 and the frequency dividing circuit 48. Thailand
Generator 47 converts the clock signal to a predetermined frequency.
, And blocks and the voltage detection circuit 14 are time-series
Control timing signal is output. In particular, RAM4
Chip enable signal CE for 3₁And read / write
Signal R₁Is output to the voltage controller 17 and the memory 16
Enable signal CE for_TwoAnd read / write
Signal R_TwoAnd a signal a for voltage switching described later is output.
You. The frequency divider 48 divides the clock signal from the oscillator 46
Time counter that is used for timekeeping
Creating a signal. The key input unit 49 is as shown in FIG.
Switch S₁~ S_ThreeAnd based on these key operations
And various functions are executed. Note that these many keys
And especially AC switch S_Two(See Figure 10) is operated
The signal AC is output, and the signal AC
Is started, or each part is initialized.
The signal AC is also sent to the voltage control unit 17.   The liquid crystal display device 50 includes the liquid crystal display panel 28 shown in FIG.
Is included in the display register D of the RAM 43.
Data (eg normal time data, stopwatch
Data or telephone number data sent from the memory unit 16.
Are displayed according to the control of the display control unit 51. concrete
A detailed display example will be described later with reference to FIG.   Next, the specific configuration and operation of the voltage control unit 17 will be described.
A description will be given based on FIGS. 5 and 6. In FIG.
In addition to the voltage control unit 17 enclosed by the dashed line,
Memory section 16 and its backup capacitor
C₁, And the same switch as shown in FIGS. 1 and 11.
Switch S₁It is shown. FIG. 6 shows each of the components in FIG.
The signal and voltage waveforms of the unit are shown.   First, during normal times (other than when replacing the battery),
(A) Switch S as shown₁Is in the off state. this
Case, one input of the NOR (NOR) circuit 61a in the latch circuit 61
Force is low level (= V₀). Also, another rack
The output of the switch circuit 62 is normally low level (= V₁> V_Two)
This V₁Is surely low level V by the level shifter 63_TwoTo
The other input of the NOR circuit 61a
Also low level (= V_Two). Therefore, the NOR circuit 61a
The output becomes high level, and the NOR circuit 61b
The output (signal c) becomes low level. The above level
The shifter 63, and the level shifters 64, 68, 69, 71 described later,
Both are composed of, for example, CMOS inverters and input
If the signal is high level (= 0V), it is high level
Is output, while the input signal is low level (= V₁Also
Or Vx), which is definitely lower
(= V_Two) Is a circuit for level-shifting and outputting.   If the signal c has a low level, the inverter circuit
When the output (signal d) of the path 61c goes high,
The output (signal e) of the bell shifter 64 is low level (= V_Two)
Become. Therefore, the transistor 65 is on, and
Transistor 66 is off (at this point, the transistor
(The register 67 is also in the off state.)
The output voltage of the constant voltage circuit 13 shown in FIG.
V is the force voltage₁Is selected and output. Also in this case,
The same as one input signal c of the NOR circuit 61d in the latch circuit 61.
And the other input is the main circuit
Chip enable signal CE from 15_Two(= V₀Or V₁)
Is obtained through the level shifter 68 (= V₀Or
V_Two). Therefore, from the NOR circuit 61d, the chip rice
Cable signal CE_TwoThe inverted signal of
To the control section 16 as the actual chip enable signal CET.
available. When this chip enable signal is given
Only in this case, the memory unit 16 can operate. In addition, the main circuit 15
Read / write signal R from_TwoThrough the level shifter 69
Obtained signal (= V₀Or V_Two) For the memory unit 16
It is provided as an actual read / write signal RT. This resource
When the read / write signal RT is high, the main circuit 15
Address signal A (A₀To A₁₁) Based on data output
Signal O (O₀Or O_Three) Can be read, while low
Level, the data input signal is
Issue I₀Or I_Four) Can be written.   Next, the time of battery replacement will be described with reference to FIG.
Bell. First, when removing the battery,
The back cover 24 is opened, and the holding ring 30 inside
Is removed. Then, as shown in FIG. 11 (b),
Switch S₁Is turned on (FIG. 6 (a)). S
Switch S₁Is turned on, the main circuit 15 stores it in the RAM 43.
Data that cannot be erased,
That is, the register P shown in FIG.₀(Written in memory section 16)
Number of stored data) and register P₁Content (me
Out of the data stored in memory 16
The addresses of data stored in the memory unit 16 are shown in FIG.
Register Y shown in₀, Y₁And so on.   Note that switch S₁Turns on, the NOR circuit 61a
Is high level (= V₀) And the output is
It switches to low level, but until the above transfer is completed
The signal b is still at the low level and the NOR circuit 61e
Since the output remains at the high level, the output of the NOR circuit 61b is output.
The force (signal c) also remains at the low level. That is,
The voltage Vx supplied to the memory unit 16 is V₁Was selected
Remains.   When the above data transfer is completed, the main circuit unit 15
The input signal to the latch circuit 62 (that is, the input signal to the memory section 16)
Force signal I_Two) At a high level for transmission and signal a
This is given to the latch circuit 62 as a trigger. This allows the latch
Circuit 62 is signal I_TwoAnd the output goes high,
Signal b is switched to a high level as shown in FIG.
Be replaced. Then, the output of the NOR circuit 61e becomes low level.
Therefore, both inputs of the NOR circuit 61b are low level.
And the output (signal c) is shown in FIG. 6 (c).
It switches to high level as shown.   When the signal c goes high, the main circuit 15
Chip enable signal CE from_TwoRegardless of Noah times
The output of the path 61d (actual chip enable signal CET) is the sixth
As shown in FIG. 4D, the memory section is at a low level.
16 operations become impossible. In this case, the inverter
The signal d which is the output of the circuit 61c is as shown in FIG.
Low level and the output of level shifter 64
Signal e goes high as shown in FIG. 6 (f).
Therefore, the transistor 65 is turned off and the transistor 66 is turned off.
Turn on. As a result, the voltage Vx supplied to the memory unit 16
Is the battery voltage V_TwoIs selected. At this time, Vx
Is a capacitor C as shown in FIG.₁Charging song
V along the line₁To V_TwoTo change. At this time, the capacitor
C₁The diode 70 is connected between the
As a result, the backflow of the battery is prevented,
Is prevented. Note that signal c has a low level (= Vx).
Really low level (= V_TwoLevel shift to switch to)
It is sent to the main circuit section 15 via the data 71.   From the above, when replacing the battery, remove the battery 11
Prior to opening switch ring 30, switch S₁Is thrown
And then the battery voltage V_TwoIs supplied to the memory unit 16
And the battery voltage V_TwoBy the capacitor C₁Is charged. What
Before removing the battery 11, remove the AC switch S shown in FIG._TwoTo
If it is turned on, the transistor 66 will be turned on.
Even if it did not change, parallel connection to this
Can turn on another transistor 67
Therefore, the memory unit 16 and the capacitor C₁Battery voltage V_TwoTo
It can be supplied reliably.   Thereafter, the battery 11 is moved from the lower housing 26 shown in FIG.
If removed, the voltage V₁, V_TwoIs any as shown in FIG.
Also becomes zero. In the meantime, it is shown in FIG.
U, capacitor C₁Is supplied to the memory unit 16
You. At this time, capacitor C₁The voltage that is initially charged
Is the voltage V₁Voltage V at least twice as high as_TwoIs
Therefore, the time during which the memory section 16 can be compensated by the discharge voltage is extremely short.
Become longer. When the battery 11 is removed, the
Pressure V₁Since there is no output, each part of the main circuit 15 stops operating.
Thus, the oscillator 46 shown in FIG. 3 also stops oscillating.   If a new battery is installed in the lower housing 26,
Battery voltage V_TwoIs the memory unit 16 and capacitor C₁Supplied to
The electric Vx is supplied to the capacitor C as shown in FIG.₁of
V along the charge curve_TwoTo rise. At this point,
The operation of each section of the road section 15 is still stopped. There
Then, as shown in FIG. 6 (g), the AC switch S_TwoOn
Then, the oscillator 46 shown in FIG. 3 starts oscillating,
(For example, the processing of FIG. 7 described later) starts
I do.   After that, cover the new battery and install the retaining ring 30
And switch S₁Is turned off as shown in Fig. 11 (a).
Switch. Switch S₁Is off, constant rise
After a lapse of time, the main circuit unit 15 inputs the input signal
That is, the input signal I to the memory unit 16_Two) Is set to low level
At the same time, the signal a is given to the latch circuit 62 as a trigger.
available. As a result, the output of the latch circuit 62 becomes low level.
(= V₁), The output of the level shifter 63 (signal
b) also ensures that the low level (=
V_Two). Then, the two inputs of the NOR circuit 61a are not needed
Since both are at low level, the output is switched to high level.
Accordingly, the output (signal c) of the NOR circuit 61b is also set to the sixth
The state is switched to the low level as shown in FIG.   When the signal c goes low, the inverter
As shown in FIG. 6 (e), the output (signal d) of the circuit 61c is
High level and the output of level shifter 64 (signal
e) becomes low level as shown in FIG. 6 (f). Yo
Therefore, the transistor 65 is turned on, and the transistor 66 is turned on.
Turns off (transistor 67 is off unless signal AC is applied)
The voltage Vx supplied to the memory unit 16
6 As shown in FIG._TwoTo V₁Switch to. Also,
The output (signal CET) of the circuit 61d is
Enable signal CE_TwoAn inverted level of
Chip enable signal CE_TwoIs low, the signal C
ET becomes high level as shown in FIG.
The re-section 16 becomes operable.   After that, before removing the battery,
The data transferred to register Y (see FIG. 2) of unit 16
Is returned to the original register of the RAM 43. And it
After an error check, etc. on these data,
Normal operation is started. Details of the above error check
Will be described later with reference to FIG. In addition, at normal time
AC switch S_TwoIs turned on, the memory section 16 and
And all data stored in RAM43 are cleared
In addition, initialization of each unit is performed.   Next, the overall processing operation of the main circuit unit 15 shown in FIG.
The operation will be described with reference to FIG. In FIG. 7,
Flag F used₀, F₁, F_TwoIs the one shown in Fig. 4.
Is the same as F₀Is set to "1" when the battery voltage drops
Flag, F₁Is the switch S when replacing the battery.₁Is turned off
"1" when the restraining ring 30 is opened)
Flag, F_TwoIs switch S_ThreeThe key is no function
This is a flag that is set to "1" when it is pressed. These flags
Is AC switch S_TwoAre turned on, all "0"
become.   First step T₁In, for example, clock function, alarm
Function, stopwatch function, data bank function, etc.
Performs normal timekeeping processing and key processing for various functions.
However, flag F_TwoIs 1, the above key processing is performed.
Absent. Then step T_TwoAnd the battery voltage (V_Two) Is the specified level
To determine if it is lower than
Step T if available_ThreeAnd here, for example,
To notify the battery voltage drop,₀Enter 1 in
It is. The determination of the battery voltage is based on the voltage detection shown in FIG.
This is performed based on the output of the output circuit 14.   Then step T_FourAt switch S₁Is on
If there is (ie, the holding ring 30 shown in FIG. 10)
The switch S₁Is on
Then step T_FiveIn F₁Check if = 0. Switch
Chi S₁Is on and F₁If = 0, replace the battery
Since it is in the state immediately after the holding ring 30 is opened,
Step T₆With flag F_TwoIs 1 (ie, the key is
See if it is no function)_Two
If T = 1, step T₇In F_TwoBy putting 1 in
Make the key no function. F_Two= 1
If so, step T as described above₁Is not performed.
Then step T₆Go to RAM 43
Transfer data to step 6, and after that, step T₉In ba
The signal a is sent to the voltage control unit 17 as a
FIG. 5 and FIG. 6 (b)). With this signal a, note
Supply voltage Vx to the rear section 16 is V₁To V_Two(Fig. 6
(See (g)), Capacitor C₁Can be backed up by
become.   On the other hand, step T_FourAt switch S₁Is off
State, step T_TenWith flag F₁= 0
I see. Switch S₁Is off and F₁If = 0,
Immediately after the battery replacement is completed and the holding ring 30 is closed
State T₁₁In the memory section 1 described above
Data transfer from 6 to RAM43 (switch T₈Data transferred by
Data restoration process). Then, step T₁₂To
Proceeds to the above-mentioned transferred data and the data in the memory section 16.
Error detection for the data. For this processing,
It will be described later with reference to FIG. If any errors are found,
Step T_FifteenTo clear all data and
By performing initialization (initialization)
Processing.   In addition, step T_TenIn F₁= 0,
Battery replacement is complete (or battery replacement has not
Not) that normal processing is continuing
Step T₁₃With flag F₁After entering 1 in step T
₁₄With AC switch S_TwoSee if there is any operation. AC switch S_TwoBut
When operated, step T_FifteenClear all data with
And performs various initializations.   Next, step T₁₂Figure 8 shows the error detection process
It will be described using FIG.   First step U₁In the above step T₁₁Transferred by
The data of the number of lines is a predetermined number (that is, as shown in FIG.
Is the maximum number that can be stored in the register X of the memory unit 16
To see if it is within the range
If it is not within the range, it is regarded as "error". Number data is prescribed
If the number is within the range, step U_TwoAnd register n
Put 1 in.   So next, step U_ThreeAnd the content of n is the above number data
To see if it is less than or equal to
Step U_FourAnd enter 1 in the register i. And su
Tep U_FiveIs the n-th data stored in the memory unit 16.
Of the item data included in the data
Bet "A" to "Z" and "-" (hyphen)
If it is not in this range, an error
I do. If the i-th character is in the above range,
U₆Adds 1 to the register i. And step U₇And i
Is less than or equal to 6 which is the maximum number of characters of item data
Look, if i is still less than 6, step U_FiveGo back. You
That is, unless there is an error, all characters in the item data
Step U above_FiveCheck.   Step U above₇If i> 6, step U₈
And enter 1 in i. And step U₉And n
Of the numerical data included in the eye data
One of "0" to "9" and "~" (hyphen)
If it is not in this range, it is determined as “error”. Up
If the i-th digit is in the above range, step U_Tenso
Add 1 to i. And step U₁₁And the content of i is
Check if the maximum number of characters of numeric data is 12 or less,
If i is still less than 12, step U₉Return to That is,
Unless there is an error, all numbers in the numeric data
Step U₉Check.   Step U above₁₁If i> 12, step U
₁₂After adding 1 to n with step U_ThreeTo return to n
To see if it is less than n is less than the number data
If there is, the above step is repeated for the n-th data.
U_Four~ U₁₂Error check by performing
I do. In this way, all data equal to the number data
When the error check is completed for
U_ThreeWhen n exceeds the number of data, the error detection process ends.
I do.   However, the processing shown in FIG. 7 and FIG.
AC switch S after entering_TwoWill not start unless you turn on
ing. AC switch S_TwoIf you turn on the
Lug F₀, F₁, F_TwoAnd registers n, i, etc. are filled with 0.   Although not shown in FIG. 7, the last table of the flow is shown.
This processing is performed in the RAM 43 in FIG.
The display control unit 51 controls the display register D (see FIG.
This is a process for displaying on the crystal device 50. Fig. 9 shows a display example.
Shown in A ninth example is shown. FIG. 3A shows a normal
This is an example of time display. In this example, the current time is "1986
Monday, December 29, 10:58:50 pm "
I have. FIG. 2B shows an example of a data bank display.
In the display area on the side, items for 6 characters consisting of names, characters, etc.
The data (contents of register Xa in Fig. 2) is displayed
In the lower display area, the telephone corresponding to the above item data is displayed.
Numerical data of 12 characters consisting of numbers etc.
Register Xb) is displayed. In the example of the figure, "CASI
O indicates that the phone number is "0425-55-7211"
ing. Also, the normal time as shown in FIG.
When a low battery voltage is detected during display (that is,
Step T_ThreeIn F₀Is set to 1), for example, ninth
“Bat.” Is displayed as shown in FIG.
The user can know that the battery voltage has dropped.
Open the back cover 24 to replace the battery, and then open the holding ring 30.
(Ie switch S₁Is on)
Indicates that “OPEN” is displayed, for example, as shown in FIG.
As a result, no facsimile
Is notified. After replacing the battery,
Immediately after closing the ring 30 and the back cover 24,₁₂(U₁
~ U₁₂) Performs error detection.
During the trip, for example, "CHECK" is displayed as shown in Fig. 9 (e).
Is shown.   As described above, in the present embodiment, when replacing the battery,
Switch S prior to removal of₁Is introduced
To protect the RAM 43 from being erased to the memory unit 16
Data, for example, the number of data,
Data address, etc., protects when replacing batteries
You can do it.   The above embodiment is an electronic wristwatch with a data bank function.
The present invention is applied to such electronic time.
Not only the total meter, but also various
Various electronic devices having a memory unit, for example, small electronic calculations
Machine, electronic organizer, electronic scheduler, electronic camera, warp
It can be applied to b. [Effect of the invention]   As described above, according to the present invention, when replacing the battery,
To make the battery ready for replacement, attach the specified members
Not backed up when moving from the second position
Of the data stored in memory, it is backed up
Data related to data stored in the first memory
Only in the first memory to be backed up
Backup the data transferred after battery replacement.
To the second memory so that both batteries can be
Function for the data stored in the other memory
Not only can you perform, but also transfer the required data
Battery can be reliably prevented without
Moreover, the amount of memory to be backed up is small.
It is a thing.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall circuit diagram of an electronic wristwatch with a data bank function to which an embodiment of the present invention is applied, FIG. 2 is a schematic configuration diagram of a memory unit 16 in FIG. 4 is a detailed circuit diagram of the main circuit unit 15 in FIG. 1, FIG. 4 is a schematic configuration diagram of the RAM 43 in FIG. 3, and FIG. 5 is a diagram showing the voltage control unit 17 and its vicinity in FIG. FIG. 6 is a timing chart for explaining the main operation of the voltage control unit 17, FIG. 7 is a flowchart showing the overall processing operation by the main circuit unit 15, and FIG. the processing of step T ₁₂ (error detection process) to the flow chart shown in detail, FIG. 9 (a) ~ (e) is a diagram showing a display example by the liquid crystal display device in FIG. 3, FIG. 10 of the present invention FIG. 11 (a) and (b) are enlarged cross-sectional views of the electronic wristwatch to which one embodiment is applied. FIG. 12 is an enlarged sectional view of a main part in an off state and an on state of FIG. ₁ , and FIG. 12 is a circuit diagram showing an example of a conventional battery backup circuit. 11 ... battery, 12 ... step-down circuit, 13 ... constant voltage circuit, 14 ... voltage detection circuit, 15 ... main circuit unit, 16 ... memory, 17 ... voltage control unit, C ₁ ... capacitor for backup, S ₁ ... switch ,
S ₂ … AC switch

   ────────────────────────────────────────────────── ─── Continuation of front page       (56) References JP-A-58-199494 (JP, A)                 JP-A-58-105499 (JP, A)                 62-105525 (JP, U)                 62-29733 (JP, U)                 Actual opening sho 59-74451 (JP, U)                 Shokai Sho-59-92974 (JP, U)                 Japanese Patent Publication No. 60-1660 (JP, B2)

Claims (1)

(57) [Rules for requesting registration of utility model] A battery power supply, an auxiliary power supply, and a power supply that is operated at an output voltage of the battery power when the battery power is mounted, and is supplied with a backup voltage from the auxiliary power supply when the battery power is removed. 1 memory, and data related to data not related to the data stored in the first memory are stored, and are operated at the output voltage of the battery power supply and supply voltage when the battery power supply is removed. And a second memory that is operated with the output voltage of the battery power supply and performs a predetermined function on data stored in the first memory and data stored in the second memory. Executing means for performing, a predetermined member has been moved from a predetermined position to make the battery power supply replaceable, and the predetermined member has been returned to the predetermined position after battery replacement. Detecting means for outputting, when the detecting means detects that the predetermined member has been moved from the predetermined position, the data relating to the data of the first memory among the data of the second memory Transfer means for transferring only data to be transferred to the first memory; and when the detection means detects that the predetermined member has been returned to a predetermined position, the transfer means transfers the first member to the first memory. And a return transfer unit for returning data in the second memory to the second memory.