JPH0440509A - Ic memory card - Google Patents

Ic memory card

Info

Publication number
JPH0440509A
JPH0440509A JP2148029A JP14802990A JPH0440509A JP H0440509 A JPH0440509 A JP H0440509A JP 2148029 A JP2148029 A JP 2148029A JP 14802990 A JP14802990 A JP 14802990A JP H0440509 A JPH0440509 A JP H0440509A
Authority
JP
Japan
Prior art keywords
battery
time
volatile memory
exchanging
main battery
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2148029A
Other languages
Japanese (ja)
Inventor
Shuichi Shirato
白土 修一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2148029A priority Critical patent/JPH0440509A/en
Publication of JPH0440509A publication Critical patent/JPH0440509A/en
Pending legal-status Critical Current

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  • Read Only Memory (AREA)
  • Power Sources (AREA)

Abstract

PURPOSE:To eliminate the troublesome operation of a change over switch at the time of exchanging a main battery by using a solar battery as an auxiliary battery for backing up a volatile memory at the time of exchanging the main battery. CONSTITUTION:The solar battery 9 is used as the auxiliary battery for backing up the volatile memory 3 at the time of exchanging the main battery 8. At the time of exchanging the main battery 8, an IC memory card is extracted from an external terminal equipment. But, an environment such as an office to which illumination is given is considered as a place where the secondary battery 8 is exchanged, and the volatile memory 3 comes to a backed up state by the super power of the solar battery 9 at that time. Thus, the troublesome operation of the change over switch at the time of exchanging the main battery becomes unnecessary, and held data is prevented from being extinguished at the time of exchanging the others.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は揮発性メモリを内蔵したICメモリカードに
関し、特にICメモリカードの主電池交換時のメモリパ
ンクアンプに関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an IC memory card with a built-in volatile memory, and particularly to a memory puncture amplifier when replacing the main battery of an IC memory card.

〔従来の技術〕[Conventional technology]

第2図は従来のICメモリカードの回路図である。第2
図において、1は電源端子、2は接地端子、3はデータ
を格納する揮発性メモリ、4.5はダイオード、6.7
は抵抗、8は揮発性メモリ3に格納されたデータを保持
するためのバックアップ用の交換可能な主電池としての
2次電池、10は2次電池の交換時に揮発性メモリ3を
バックアップするための副電池としての1次電池、11
は2次電池8の交換時に揮発性メモリ3を1次電池10
によってバックアップさせるためにオンされる切替えス
イッチ、12は2次電池8の電池電圧を検出するための
電池電圧検出端子である次にこの従来例の動作について
説明する。
FIG. 2 is a circuit diagram of a conventional IC memory card. Second
In the figure, 1 is a power supply terminal, 2 is a ground terminal, 3 is a volatile memory that stores data, 4.5 is a diode, and 6.7
8 is a resistor, 8 is a secondary battery as a backup replaceable main battery for holding data stored in the volatile memory 3, and 10 is a secondary battery for backing up the volatile memory 3 when replacing the secondary battery. Primary battery as a sub battery, 11
When replacing the secondary battery 8, the volatile memory 3 is replaced with the primary battery 10.
12 is a battery voltage detection terminal for detecting the battery voltage of the secondary battery 8. Next, the operation of this conventional example will be explained.

第2図において、揮発性メモリ3に格納されたデータ(
情報)は、2次電池8によって、抵抗6と並列接続され
たダイオード4を介してバックアップされる。今、外部
端末装置によって電池電圧検出端子12を介して2次電
池8の起電力が低下していることが検知された場合、切
替えスイッチ11をオンにすると、1次電池10によっ
て抵抗7とダイオード5を介して揮発性メモリ3をバッ
クアップする。この状態にしておいて2次電池8を交換
する。その後切替えスイッチ11をオフにする。この時
、切替えスイッチ11をオンのままにして使用すると、
1次電池10は消耗してしまい使用できなくなる。
In FIG. 2, data stored in the volatile memory 3 (
information) is backed up by a secondary battery 8 via a resistor 6 and a diode 4 connected in parallel. Now, if the external terminal device detects via the battery voltage detection terminal 12 that the electromotive force of the secondary battery 8 is decreasing, when the changeover switch 11 is turned on, the primary battery 10 will cause the resistor 7 and the diode to 5 to back up the volatile memory 3. In this state, the secondary battery 8 is replaced. After that, the changeover switch 11 is turned off. At this time, if you leave the selector switch 11 on and use it,
The primary battery 10 is exhausted and becomes unusable.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

従来のICメモリカードは、以上のように構成されてい
るので、主電池である2次電池を交換する19、切替え
スイッチをオン/オフしなければならず操作が面倒であ
り、また、新品の2次電池を交換した後、切替えスソチ
をオフにすることを忘れた場合は、副電池である1次電
池は消耗してしまい、次回の交換時に保持データが消滅
するなどの問題点があった。
Conventional IC memory cards are configured as described above, so it is cumbersome to operate as the secondary battery, which is the main battery, must be replaced19 and the changeover switch must be turned on and off. If you forget to turn off the switching switch after replacing the secondary battery, the primary battery, which is the secondary battery, will run out and the retained data will disappear the next time you replace it. .

この発明は上記のような問題点を解決するためになされ
たもので、主電池を交換する際の面倒な切替スイッチの
操作が不要で、主電池の交換時に保持データが消滅する
ようなことをなくするICメモリカードを提供すること
を目的とする。
This invention was made in order to solve the above-mentioned problems, and eliminates the need for the troublesome operation of a changeover switch when replacing the main battery, and prevents the loss of retained data when replacing the main battery. The purpose of this invention is to provide an IC memory card that eliminates the need for storage.

〔課題を解決するだめの手段〕 この発明に係るICメモリカードは、主電池(2次電池
8)の交換時に揮発性メモリ3をバックアップするため
の副電池として太陽電池9を用いたものである。
[Means for Solving the Problem] The IC memory card according to the present invention uses a solar cell 9 as a sub-battery for backing up the volatile memory 3 when replacing the main battery (secondary battery 8). .

〔作用〕[Effect]

太陽電池9は、太陽や蛍光灯などからの光を受けていれ
ば常に揮発性メモリ3をハックアンプする。
The solar cell 9 always hack-amplifies the volatile memory 3 when receiving light from the sun, a fluorescent lamp, or the like.

〔実施例〕〔Example〕

第1図はこの発明の一実施例に係るICメモリカードの
回路図である。第1図において、第2図に示す構成要素
に対応するものには同一の符号を付し、その説明を省略
する。第1図において、9は2次電池8の交換時に揮発
性メモリ3をバックアップするための副電池としての太
陽電池である。
FIG. 1 is a circuit diagram of an IC memory card according to an embodiment of the present invention. In FIG. 1, components corresponding to those shown in FIG. 2 are designated by the same reference numerals, and their explanations will be omitted. In FIG. 1, reference numeral 9 denotes a solar cell as a sub-cell for backing up the volatile memory 3 when the secondary battery 8 is replaced.

次にこの実施例の動作について説明する。揮発性メモリ
3は、2次電池8によって抵抗6と並列接続されたダイ
オード4を介してバンクアンプされ、格納されているデ
ータが保持される。また、太陽電池9に光が当たってい
る場合は、抵抗7とダイオード5を介して揮発性メモリ
3がバックアップされる。今、外部端末装置によって電
池電圧=3− 検出端子12を介して2次電池8の起電力が低下してい
ることが検知された場合、2次電池8を交換するために
ICメモリカードを外部端末装置より引き抜く。ここで
、−数的に2次電池8を交換する場所としては、照明の
施された事務室のような環境が考えられ、その交換時に
は太陽電池9の起電力により揮発性メモリ3はバックア
ップされた状態となる。この状態で2次電池8を交換す
る。
Next, the operation of this embodiment will be explained. The volatile memory 3 is bank-amplified by a secondary battery 8 via a diode 4 connected in parallel with a resistor 6, and stored data is held. Further, when the solar cell 9 is exposed to light, the volatile memory 3 is backed up via the resistor 7 and the diode 5. Now, if the external terminal device detects that the electromotive force of the secondary battery 8 is decreasing via the battery voltage = 3- detection terminal 12, the IC memory card is inserted externally in order to replace the secondary battery 8. Pull it out from the terminal device. Here, - Numerically speaking, the place where the secondary battery 8 is replaced may be an environment such as a well-lit office, and at the time of replacement, the volatile memory 3 is backed up by the electromotive force of the solar cell 9. The state will be as follows. In this state, the secondary battery 8 is replaced.

なお、上記実施例では、主電池として2次電池を用いた
が、それに限らす1次電池を用いてもよい。
In the above embodiments, a secondary battery is used as the main battery, but a primary battery may also be used.

〔発明の効果〕〔Effect of the invention〕

以上のように本発明によれば、主電池の交換時に揮発性
メモリをバンクアンプするための副電池として太陽電池
を用いたので、従来のように主電池を交換する際の面倒
な切替えスイッチの操作が不要となり、主電池の交換作
業が容易となり、また、主電池の交換時に保持データが
消滅するようなことがなくなり、データ保持の信頼性が
高いICメモリカードを提供できるという効果が得られ
る。
As described above, according to the present invention, a solar cell is used as an auxiliary battery for bank-amplifying volatile memory when replacing the main battery, so there is no need for a troublesome changeover switch when replacing the main battery as in the past. This eliminates the need for operations, simplifies the work of replacing the main battery, and eliminates the possibility of data being lost when the main battery is replaced, resulting in the ability to provide an IC memory card with highly reliable data retention. .

【図面の簡単な説明】[Brief explanation of drawings]

第1図はごの発明の一実施例に係るICメモリカードの
回路図、第2図は従来のICメモリカドの回路図である
。 3・・・揮発性メモリ、8・・・2次電、池(主電池)
、9・・・太陽電池(副電池)。
FIG. 1 is a circuit diagram of an IC memory card according to an embodiment of the invention, and FIG. 2 is a circuit diagram of a conventional IC memory card. 3... Volatile memory, 8... Secondary battery, battery (main battery)
, 9...Solar battery (auxiliary battery).

Claims (1)

【特許請求の範囲】[Claims]  揮発性メモリを内蔵し、この揮発性メモリに格納され
たデータを保持するためのバックアップ用の交換可能な
主電池と、この主電池の交換時に上記揮発性メモリをバ
ックアップするための副電池とを備えたICメモリカー
ドにおいて、上記副電池として太陽電池を用いることを
特徴とするICメモリカード。
It has a built-in volatile memory, a replaceable main battery for backup purposes to retain data stored in this volatile memory, and an auxiliary battery to back up the volatile memory when the main battery is replaced. An IC memory card comprising: a solar cell as the sub-cell.
JP2148029A 1990-06-06 1990-06-06 Ic memory card Pending JPH0440509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2148029A JPH0440509A (en) 1990-06-06 1990-06-06 Ic memory card

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2148029A JPH0440509A (en) 1990-06-06 1990-06-06 Ic memory card

Publications (1)

Publication Number Publication Date
JPH0440509A true JPH0440509A (en) 1992-02-10

Family

ID=15443524

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2148029A Pending JPH0440509A (en) 1990-06-06 1990-06-06 Ic memory card

Country Status (1)

Country Link
JP (1) JPH0440509A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5651599A (en) * 1991-02-22 1997-07-29 Seiko Epson Corporation Projection type liquid crystal projector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5651599A (en) * 1991-02-22 1997-07-29 Seiko Epson Corporation Projection type liquid crystal projector
USRE40296E1 (en) 1991-02-22 2008-05-06 Seiko Epson Corporation Projection type liquid crystal projector
USRE42740E1 (en) 1991-02-22 2011-09-27 Seiko Epson Corporation Projector

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