JP2001156888A - Portable information unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable information unit by which specification setting, etc., selected by a user is not erased even when a battery is changed. SOLUTION: A first storage circuit 31 for storing one's own number or the request specifications of a service company, etc., and a second storage circuit 34 for storing information to be changed in the case of usage, etc., are constituted of an electrically re-writable non-volatile memory and only the second storage circuit 34 is provided with a re-writable power source circuit 35 and a control signal for protecting the storage of the first circuit 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for configuring a storage circuit of a portable information device.

[0002]

2. Description of the Related Art In recent years, remarkable progress has been made in integrated circuit technology and high-density packaging technology, and these have led to the miniaturization and high functionality of portable information equipment along with the progress of digital signal technology. Even in wireless selective calling receivers and the like, which are rapidly expanding their markets as portable information devices, the required specifications have become extremely sophisticated as information receiving terminals, not as conventional simple individual calling receivers. In addition, with the expansion of the market, the number of users has been diverse, and the types of required specifications have been increasing. But at the factories and service departments that manufacture,
Since the cost must be reduced by producing a large number of identical products, the call numbers unique to each device and the information for switching some of the specifications are stored in electrically rewritable nonvolatile memory. I have. Further, a RAM backed up by a capacitor or the like is used to allow a user to change a part of the specification and to store the setting even when replacing the battery.

[0003]

However, in a conventional portable information device, there is a great risk that a part of the specification selected by the user and the contents of the RAM storing the information may be lost when the battery is replaced. There was a problem. In view of the above, an object of the present invention is to provide a portable information device in which specifications selected by a user do not disappear when a battery is replaced.

[0004]

SUMMARY OF THE INVENTION A portable information device of the present invention compares a preset own number with a received information number, and when they match, receives the information following the information number. In the information device, the first storage means for storing its own number and the like and the second storage means for storing information changed at the time of use are constituted by electrically rewritable nonvolatile memories. And

[0005]

The details of the present invention are described below by way of examples.

FIG. 1 is a block diagram showing the configuration of a conventional radio selective calling receiver. The signal input from the antenna 10 is converted into a digital signal by the radio receiving circuit 11 and error-corrected by the decoding circuit 12.
Memory for storing individual call addresses (hereafter ID
When the address in the address 13 and the calling address in the received signal are compared in the decoding circuit 12 and a match is detected, an address match signal is output to the control circuit 16. The control circuit 16 starts receiving a message according to this signal, processes the message signal from the decoding circuit 12 and stores it in the storage circuit 19. At this time, the control circuit 16 controls the speaker 14, the LED 15, and the vibrator 18 to notify the user of the reception of the message. Specification storage circuit 17
Stores information for switching the specification of the radio selective calling receiver according to the service of each service company, and the control circuit 16 controls functions based on this information. ID
The M13 and the specification storage circuit 17 are composed of an electrically rewritable EEPROM, and the contents are written by a manufacturer or a service company.

FIG. 2 is a block diagram showing the configuration of a radio selective calling receiver according to one embodiment of the present invention. The signal input from the antenna 10 is converted into a digital signal by the radio receiving circuit 11 and error-corrected by the decoding circuit 12. When the address in the ID M13 and the calling address in the received signal are compared in the decoding circuit 12 and a match is detected, an address match signal is output to the control circuit 16. The control circuit 16 starts receiving a message according to this signal, processes the message signal from the decoding circuit 12 and stores it in the storage circuit 19. At this time, the control circuit 16
Controls the speaker 14, the LED 15, and the vibrator 18 according to the contents stored in the specification storage circuit 17 and the notification method storage circuit 21 instructed by the user in advance, and notifies the user of the reception of the message. The notification method storage circuit 21 is constituted by an electrically rewritable EEPROM.

FIG. 3 is a diagram showing a configuration of a digital signal processing section of a radio selective calling receiver according to an embodiment of the present invention. The decoding circuit 12, the control circuit 16, and the storage circuit 19 are provided in a CPU 30 having a built-in gate array. CPU3
0 has a timekeeping function, and can store the reception time and control the alarm time. The CPU 30 has an oscillation circuit corresponding to both 32,768 Hz for receiving a signal of 512 bits / second and a crystal of 76,800 Hz for receiving a signal of 1,200 bits / second, and uses a clock necessary for a timing circuit from each frequency. Can be divided. ID / M1 in the EEPROM 31
3 and a part of the specification (a part that cannot be changed by the user). The melody IC 32 is in charge of outputting a melody at the time of receiving a message, and operates according to an instruction from the CPU 30. FIG. 6 shows a flowchart of the melody IC control. If there is no data in the determination 61 as to whether or not the scale data of the melody is designated, the music is designated 62, and if there is, the data is set 63. A start signal is output 64 to the melody IC 32, the user stops 65, and the sounding time ends 66.
The melody IC outputs a melody signal until CPU 3
0 sounds a melody from the speaker 14 with the signal. When the termination condition is satisfied, the control circuit 16 returns to the melody ST.
The control of OP67 is performed. The LCD 33 is a display device for notifying a user of a message stored in the storage circuit 19 and an operation state of the radio selective calling receiver, and a driver circuit is built in the CPU 30. The circuit described above is constituted by an IC that operates at a voltage of 0.9 V or more in order to operate with one battery. Specification storage circuit 34 is EEP
A ROM is used, and part of the function of the notification method storage circuit 21 is shared. The remaining information is stored in the CPU 30. The power supply circuit 35 boosts the high voltage for rewriting information in the specification storage circuit 34 from the battery voltage under the control of the CPU 30. The power supply circuit 35 is used only when rewriting the data stored in the specification storage circuit 34. Normally, the function is stopped and the current consumed is very small. Specification storage circuit 34
The information stored in the melody includes a melody tune and a ringing time that are notified when the information is received. When the battery voltage falls below a certain value by the voltage detection circuit in the CPU 30,
The user is notified of the state by control of a program in the CPU 30, and necessary information among the information stored in the CPU 30 is periodically copied to the specification storage circuit 34. With this function, if the date, month, Sunday, etc. of the clock information are stored in the EEPROM, it is convenient when replacing the battery. The contents of the storage circuit 19 are backed up by a capacitor or the like even when the battery is replaced, and the memory remains when the battery is replaced for a short time. After the return, the contents of the storage circuit 19 can be checked using the checksum information. The EEPROM rewriting circuit 36 is an EEPROM
31 is an interface circuit for changing the contents of the specification storage circuit 34 and an external device. When a plurality of IDs / Ms 13 are provided, the basic IDs / Ms may be stored in the EEPROM 31 and a changeable ID / M may be stored in the specification storage circuit 34.

FIG. 4 is a diagram showing the configuration of a digital signal processing section of a radio selective calling receiver according to one embodiment of the present invention. The EEPROM 31 shown in FIG. 3 and the EEPROM of the specification storage circuit 34 are constituted by the same EEPROM 40. The storage area corresponding to the EEPROM 31 in the EEPROM 40 is a circuit that can be changed only from an external device through the rewriting circuit 36. This is to eliminate the danger of the CPU running away due to external influences such as static electricity and destroying the memory corresponding to the EEPROM 31.
The storage content of the storage area of the specification storage circuit 34 can be changed by supplying a voltage from the power supply circuit 35.

FIG. 5 is a diagram showing a configuration of a digital signal processing section of a radio selective calling receiver according to one embodiment of the present invention. The control signal 51 is a signal that enables the EEPROM 40 to be rewritten. When the control signal 51 is connected to an external device through the EEPROM rewriting circuit 36, writing is permitted.
The control signal 52 is a control signal for a storage area corresponding to the specification storage circuit 34, and can be controlled from the CPU 30. By using the control signal 51 and the control signal 52 as a common signal line, it is also possible to inspect a difference in voltage between the two. For example, when data is written through the EEPROM rewriting circuit 36, a voltage of 12 V or more is supplied, so that all the information in the EEPROM 40 can be rewritten by this voltage. When power is supplied by internal boosting, writing to an area corresponding to the specification storage circuit 34 becomes possible at a voltage of 3 V or more (writing cannot be performed with a battery voltage). According to this method, the number of control signals is one, and compatibility with the conventional EEPROM can be easily obtained.

[0011]

According to the present invention, it is possible to provide a portable information device in which specifications and the like selected by the user do not disappear even when the battery is replaced. This makes it possible to supply portable information equipment that meets the specifications required by the user at low cost and in a timely manner, and it is not necessary to set the specifications every time the battery is replaced. Also, when the EEPROM is unified to one,
Since basic stored information such as DM can be completely protected,
The effect is very large.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a conventional radio selective calling receiver.

FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of a digital signal processing unit according to one embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of a digital signal processing unit according to one embodiment of the present invention.

FIG. 5 is a diagram showing a configuration of a digital signal processing unit according to one embodiment of the present invention.

FIG. 6 is a flowchart of a melody control unit according to an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 10 antenna 11 wireless receiving circuit 12 decoding circuit 13 ID / M 14 speaker 15 LED 16 control circuit 18 vibrator 19 storage circuit 30 CPU 31 EEPROM 32 melody IC 33 LCD 34 specification recording circuit 35 power supply circuit 36 EEPROM rewriting circuit

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[Procedure amendment]

[Submission Date] October 25, 2000 (2000.10.
25)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

[0004]

SUMMARY OF THE INVENTION A portable information device according to the present invention compares a self-set number with a received information number and detects coincidence between the two. Equipped with rewritable nonvolatile memory,
The non-volatile memory includes a first storage area for storing the own number, and a second storage area for storing a specification specified by a user.
Wherein the second storage area is configured to be rewritable under the control of the portable information device. In the portable information device, the nonvolatile memory is rewritten. A power supply circuit for generating a voltage for the second storage area, the power supply circuit being controlled to operate only when the second storage area is rewritten.

Claims (5)

[Claims] 1. A portable information device which compares a preset own number with a received information number and, when they match, receives information following the information number, stores its own number and the like. A portable information device characterized in that the first storage means and the second storage means for storing information changed during use and the like are constituted by electrically rewritable nonvolatile memories. 2. The portable information device according to claim 1, further comprising storage protection means for protecting information in the first storage means. 3. The first storage means and the second storage means having the same I
3. The portable information device according to claim 2, wherein the portable information device is constituted by C. 4. The portable information device according to claim 2, further comprising storage protection means for detecting an externally supplied voltage. 5. The portable information device according to claim 3, wherein the storage means is constituted by an IC having a plurality of storage areas and having a terminal for rewriting control for each storage area.