JPS58196671A - Semiconductor storage element - Google Patents

Semiconductor storage element

Info

Publication number
JPS58196671A
JPS58196671A JP57076712A JP7671282A JPS58196671A JP S58196671 A JPS58196671 A JP S58196671A JP 57076712 A JP57076712 A JP 57076712A JP 7671282 A JP7671282 A JP 7671282A JP S58196671 A JPS58196671 A JP S58196671A
Authority
JP
Japan
Prior art keywords
latch
mode
address
timing
speed operation
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
JP57076712A
Other languages
Japanese (ja)
Inventor
Takashi Tabei
田部井 隆
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP57076712A priority Critical patent/JPS58196671A/en
Publication of JPS58196671A publication Critical patent/JPS58196671A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C7/00Arrangements for writing information into, or reading information out from, a digital store
    • G11C7/22Read-write [R-W] timing or clocking circuits; Read-write [R-W] control signal generators or management 

Landscapes

  • Static Random-Access Memory (AREA)
  • Semiconductor Integrated Circuits (AREA)
  • Semiconductor Memories (AREA)

Abstract

PURPOSE:To improve the productivity of semiconductor storage elements, by switching the type of a high-speed operation mode that is supported with setting of a mode control latch, and therefore realizing different high-speed operation modes including a page mode, a nipple mode, etc. by a common chip. CONSTITUTION:A 1-bit mode control latch 6 is provided to switch a page mode and a nipple mode each other. When the nipple mode is set at the latch 6, the fetching is inhibited for address inputs A0-A7 together with the refetching to a data latch 3 after the timing T3 fed from a generator 3, and at the fall of a CAS input. At the same time, an address latch 5b can be counted up. The output of the latch 3 is switched by ON and OFF of the CAS input. While the count-up of the latch 5b is inhibited at and after the timing T3 with the output of the latch 6 when a page mode is set. Then it is possible at the fall of the CAS input to refetch the inputs A0-A7 as well as the refetching to the latch 3.

Description

【発明の詳細な説明】 本発明は半導体記憶素子に関し、特に高速動作モードを
有する半導体記憶素子に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a semiconductor memory device, and more particularly to a semiconductor memory device having a high-speed operation mode.

従来技術 連続したアドレスから情報を連続的して高速に読み出し
、または書き込みするために1ページモードと呼ばれる
高速動作モードを持つ半導体記憶素子が従来からある。
2. Description of the Related Art Conventionally, semiconductor memory elements have been provided which have a high-speed operation mode called a one-page mode in order to continuously read or write information from consecutive addresses at high speed.

また最近、ルビット(ルー4− 81 1tc.) の
連続したアドレスを高速に読み書き可能な、ニブルモー
ドと呼ばれる高速動作モードを持つ半導体記憶素子が開
発された。このニブルモードはページモードより優れた
点があるので、今後、多くの半導 一体記憶素子で標準
的に採用されることが予想される。
Recently, a semiconductor memory element has been developed which has a high-speed operation mode called nibble mode, which allows reading and writing of consecutive addresses of Rubit (Lou 4-81 1tc.) at high speed. Since nibble mode has advantages over page mode, it is expected that it will be adopted as standard in many semiconductor integrated memory devices in the future.

ここで間醜となるのは、ページモードをサポートする半
導体記憶素子を用いた装置類が多数存在するので、ニブ
ルモードの半導体記憶素子だけに一本化することが許さ
れないことである。しかし、ページモードをサポートす
る半導体記憶素子と、ニブルモードをサポートする半導
体記憶素子とを、それぞれ別々のメモリチップとして実
現したのでは、生産性の向上を妨げる要因となる。
The problem here is that since there are many devices using semiconductor memory elements that support page mode, it is not permissible to integrate only nibble mode semiconductor memory elements. However, if a semiconductor memory element that supports page mode and a semiconductor memory element that supports nibble mode are implemented as separate memory chips, this becomes a factor that hinders productivity improvement.

発明の目的 本発明は前記のような問題点に鑑み、ページモード.ニ
ブルモードなどの複数種類の高速動作モードをサポート
する半導体記憶素子を提供することt目的とする。
Purpose of the Invention In view of the above-mentioned problems, the present invention provides a page mode. An object of the present invention is to provide a semiconductor memory element that supports multiple types of high-speed operation modes such as nibble mode.

しかして本発明による半導体記憶素子は、モード制御用
ラッチと、複数種類の高速動作モードのうち該モード制
御用ラッチの設定状!に対応する1つの高速動作モード
を選択する回路とを備え、該モード制御用ラッチの設定
によってサポートする高速動作モードの種類を切り換え
るよう構成したことを特徴とするものである。
Therefore, the semiconductor memory element according to the present invention includes a mode control latch and a setting state of the mode control latch among multiple types of high-speed operation modes. The present invention is characterized in that it includes a circuit for selecting one high-speed operation mode corresponding to the above, and is configured to switch the type of high-speed operation mode supported by setting the mode control latch.

発明の実施例 第1図は、本発明による64KBのRAM(ランダム・
アクセス・メモリ)のブロック図である。
Embodiment of the Invention FIG. 1 shows a 64KB RAM (random memory) according to the present invention.
FIG. 2 is a block diagram of an access memory.

同図において、llはメモリセルを128行×128列
のマトリクスに配列したメモリブロックであり、これは
4ブロツクある。各メモリブロック1は128”1固の
センスアンプ2を持つ。8はデータラッチであり、各メ
モリブロックlに対しI Illずつ設けられている。
In the figure, 11 is a memory block in which memory cells are arranged in a matrix of 128 rows by 128 columns, and there are four blocks. Each memory block 1 has a 128" sense amplifier 2. 8 is a data latch, which is provided for each memory block l.

番α、4bはセレクタ、5α、5At−1アドレスラツ
チ、7α、7bはアドレスデコーダである。8はタイミ
ング発生器であり、6はモード制御用ラッチである。タ
イミング発生器8は、モード制御用ラッチ6の設定状態
に応じて、高速動作モード全ページモード、またはニブ
ルモードに切り換えるモード1択回路としても働く。
Numbers .alpha. and 4b are selectors, 5.alpha. and 5At-1 address latches, and 7.alpha. and 7b are address decoders. 8 is a timing generator, and 6 is a mode control latch. The timing generator 8 also functions as a mode 1 selection circuit that switches to the high-speed operation mode, all page mode or nibble mode, depending on the setting state of the mode control latch 6.

メモリブロックlの配憶情報の続出しについて説明する
The successive addition of storage information for memory block l will be explained.

タイミング発生回路8で制御される初めのタイミンクで
アドレス人力Ao−Ay(8ビツト)の内容がアドレス
チッチ5αに取り込まれ、アドレスデコーダ7αはメモ
リブロックlの128行中のアドレス人力A。−A、で
指定された1行のワード線を駆動する。そのワード線上
の(128X 4 )ビットのデータがデータ線を介し
てセンスアンプ2に読み出される。その次のタイミング
で入力されるアドレス人力AO〜At K: したがっ
て、各セレクタ4αは対応する各センスアンプ2(12
8個)中の1つの出力を選択し、対応のデータラッチ8
にセットする。                  
       1もし、モード制御用ラッチ6がニブル
モードに設定されていると、第2図のタイミング図に示
すように動作する。すなわち、アドレス入力へ〇から第
1.第2タイミングT1.T11でアドレスラッチ5b
llC取り込んだ2ビツトの情報により、アドレスデコ
ーダ7bはセレクタ4bを制御して4ビツトのデータラ
ッチ8中の1ビツトのデータを選択し、読み出す。さら
に、CAS入力のオン、オフにしたがって、アドレスラ
ッチ5bはタイミング発生回路8によりカウントアツプ
せしめられ、これによってデータラッチ8の残りの8ビ
ツトがセレクタ4bを介して順に読み出される(第8゜
第4.第5タイミングT3.T4.Tl5)。
At the first timing controlled by the timing generation circuit 8, the contents of the address input Ao-Ay (8 bits) are taken into the address switch 5α, and the address decoder 7α reads the address input A in the 128 rows of the memory block 1. -A, drives one row of word lines designated by A. (128X 4 ) bits of data on the word line are read to the sense amplifier 2 via the data line. Addresses AO to AtK input at the next timing: Therefore, each selector 4α selects each corresponding sense amplifier 2 (12
Select one output from 8) and press the corresponding data latch 8.
Set to .
1. If the mode control latch 6 is set to nibble mode, it operates as shown in the timing diagram of FIG. In other words, from 〇 to 1st address input. Second timing T1. Address latch 5b at T11
Based on the 2-bit information taken in by IC, the address decoder 7b controls the selector 4b to select 1-bit data in the 4-bit data latch 8 and read it out. Furthermore, in accordance with the on/off state of the CAS input, the address latch 5b is caused to count up by the timing generation circuit 8, and thereby the remaining 8 bits of the data latch 8 are sequentially read out via the selector 4b (8th and 4th bits). .5th timing T3.T4.Tl5).

一方、モード制御用ラッチ6にページモードが設定され
ると、第8図のタイミング図に示すようなページモード
で動作する。すなわち、アドレス入力A8から第1.第
2のタイミングT1. T*で取込んだアドレス2ビツ
トの情報でランチ8の中の1ビツトを選択し、蝦初の1
ビツトを読み出す。ここまでは、ニブルモードと同じ動
作であるが、第8のタイミングT3以後のCA8人力の
オン、オフによるアドレスラッチ5bのカウントアツプ
は行なわない。そして、CAS入力の立下りでアドレス
人力Ao=Avより次のアドレス情報を取込み、列側の
アドレスデコーダ7Cを切り替えることによりセンスア
ンプ2の出力の再選択を行う。再選択されたセンスアン
プ2の出力はデータラッチ8に取込み、先にアドレス入
力んから第1.第2のタイミングで取り込んだアドレス
で指定される1ビツトを出力として取り出す。
On the other hand, when the page mode is set in the mode control latch 6, the device operates in the page mode as shown in the timing diagram of FIG. That is, from address input A8 to the first . Second timing T1. Select 1 bit in lunch 8 using the 2-bit address information taken in by T*, and
Read bit. Up to this point, the operation is the same as in the nibble mode, but the address latch 5b is not counted up by turning on and off the CA8 manually after the eighth timing T3. Then, at the fall of the CAS input, the next address information is taken in from the address input Ao=Av, and the output of the sense amplifier 2 is reselected by switching the address decoder 7C on the column side. The output of the reselected sense amplifier 2 is taken into the data latch 8, and since the address is input first, the first . One bit specified by the address fetched at the second timing is taken out as an output.

この様に本実施例においては、ニブルモードとページモ
ードを切り替えるために1ビツトのモード制御用ラッチ
6を設け、それにニブルモードを設定した場合、第8の
タイミングTs以後でCAS入力の立下りで、アドレス
人力Ao−A、の取込みおよびデータラッチ8への再取
込みを禁止するとともにアドレスラッチ5hのカウント
アツプを可能とし、CA8人力のオン、オフによりデー
タラッチ8の出力を切り替える様にする。一方、モード
制御用ラッチ6にページモードを設定した場合、(この
モード制御用ラッチ6を反転させた場合)このラッチ6
の出力により、第8のタイミングTIS以後、アドレス
ラッチ5bのカウントアツプを禁止し、CA8入力の立
下りでアドレス人力AO−AY再取込みとデータラッチ
8への再取込みを可能にする。
As described above, in this embodiment, when the 1-bit mode control latch 6 is provided to switch between the nibble mode and the page mode, and the nibble mode is set, the falling edge of the CAS input after the 8th timing Ts , address manual input Ao-A, and re-capture into the data latch 8 are prohibited, and the address latch 5h is allowed to count up, and the output of the data latch 8 is switched by turning on and off the CA8 manual input. On the other hand, when the page mode is set to the mode control latch 6, (when this mode control latch 6 is reversed), this latch 6
This output inhibits the address latch 5b from counting up after the eighth timing TIS, and enables re-capturing of the address AO-AY and data latch 8 at the falling edge of the CA8 input.

このモード制御用ラッチ6の設定方法は種々可能である
。その第1の例は、このラッチ6(フリップフロップ)
を書込み可能なROMとし、ウェハの段階で、電気的に
又はレーザ等を使って書込む。第2の例としては、第4
図のタイミング図に示す様にRASオンリーリフレッシ
ュサイクル時、WE倍信号又はリフレッシュに関係ない
アドレス(As)、又はデータ入力信号等をデータとし
て、このラッチ6に取込む方法がある。さらに装置の電
源オン時等に特殊のタイミングで初期設定を行う等の方
法がある。
Various methods are possible for setting the mode control latch 6. The first example is this latch 6 (flip-flop)
is a writable ROM and is written electrically or using a laser or the like at the wafer stage. As a second example, the fourth
As shown in the timing chart in the figure, there is a method of taking in the WE multiplication signal, an address (As) unrelated to refresh, a data input signal, etc. into the latch 6 as data during the RAS only refresh cycle. Furthermore, there is a method of performing initial settings at a special timing such as when the power of the device is turned on.

なお、高速動作モードとして、ニブルモードとページモ
ードを例にして説明したが、これら以外の高速動作モー
ドについても同様に考えればよい。
Although nibble mode and page mode have been described as examples of high-speed operation modes, other high-speed operation modes may be considered in the same way.

また、8棟類以上の高速動作モードを切り換えてサポー
トする半導体記憶素子も容易に実現可能で発明の効果 本発明によれば、ページモード、ニブルモードなどの2
種類以上の異なる高速動作モードを共通のメモリチップ
で実現できるので、半導体記憶素子の生産性を向上でき
る。
In addition, it is possible to easily realize a semiconductor memory device that can switch and support eight or more high-speed operation modes.
Since more than one type of high-speed operation mode can be realized with a common memory chip, productivity of semiconductor memory elements can be improved.

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

第1図は本発明の一実施例を示すブロック図、第2図は
ニブルモード時のタイミングを示す図、第8図はページ
モード時のタイミングを示す図、第4図はリフレッシュ
サイクル時KWE信号の情報をモード制御用ラッチに設
定する際のタイミングを示す図である。 ■・・・メモリブロック、2・・・センスアンプ、8・
・・データラッチ、4a、4に−・−セレクタ、5a、
5A・・・アドレスラッチ、6・・・モード制御用ラッ
チ、7α、’76、’lc・・・アドレスデコーダ、8
・・・タイミング発生回路。            
            □1代理人 弁理士  薄 
 1) 利  幸 ′:第1図 第2図 第3図 WE      −□−”□
FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing timing in nibble mode, FIG. 8 is a diagram showing timing in page mode, and FIG. 4 is a diagram showing KWE signal during refresh cycle. FIG. 4 is a diagram showing timing when setting information on a mode control latch. ■...Memory block, 2...Sense amplifier, 8.
...Data latch, 4a, 4--Selector, 5a,
5A... Address latch, 6... Mode control latch, 7α, '76, 'lc... Address decoder, 8
...Timing generation circuit.
□1 Agent Patent Attorney Usuki
1) Toshiyuki': Figure 1 Figure 2 Figure 3 WE -□-”□

Claims (1)

【特許請求の範囲】[Claims] (1)モード制御用ラッチと、複数種類の高速動作モー
ドのうち該モード制御用ラッチの設定状態に対応する1
つの高速動作モードを選択する回路とを備え、該モード
制御用ラッチの設定によってサポートする高速動作モー
ドの種類を切り換えるよう構成したことを特徴とする半
導体記憶素子。
(1) A mode control latch and one of the multiple high-speed operation modes that corresponds to the setting state of the mode control latch.
1. A semiconductor memory device comprising: a circuit for selecting one of two high-speed operation modes, and configured to switch the type of high-speed operation mode supported by setting the mode control latch.
JP57076712A 1982-05-10 1982-05-10 Semiconductor storage element Pending JPS58196671A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57076712A JPS58196671A (en) 1982-05-10 1982-05-10 Semiconductor storage element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57076712A JPS58196671A (en) 1982-05-10 1982-05-10 Semiconductor storage element

Publications (1)

Publication Number Publication Date
JPS58196671A true JPS58196671A (en) 1983-11-16

Family

ID=13613150

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57076712A Pending JPS58196671A (en) 1982-05-10 1982-05-10 Semiconductor storage element

Country Status (1)

Country Link
JP (1) JPS58196671A (en)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61113188A (en) * 1984-07-26 1986-05-31 テキサス インスツルメンツ インコ−ポレイテツド Semiconductor memory having improved address counter
JPS61123154A (en) * 1984-11-20 1986-06-11 Fujitsu Ltd Gate-array lsi device
JPS61289595A (en) * 1985-06-17 1986-12-19 Hitachi Ltd Semiconductor memory device
JPS6249457A (en) * 1985-08-28 1987-03-04 Ascii Corp Storage unit
JPS6249458A (en) * 1985-08-28 1987-03-04 Ascii Corp Memory device
JPS62103895A (en) * 1985-08-07 1987-05-14 テキサス インスツルメンツ インコ−ポレイテツド Semiconductor memory and operation thereof
JPH031394A (en) * 1989-05-29 1991-01-08 Nec Corp Storage device
JPH05216741A (en) * 1992-05-20 1993-08-27 Hitachi Ltd Storage circuit and its operating mode setting method
US5265234A (en) * 1985-05-20 1993-11-23 Hitachi, Ltd. Integrated memory circuit and function unit with selective storage of logic functions
JPH0784860A (en) * 1994-08-08 1995-03-31 Hitachi Ltd Information processing system
JPH0784861A (en) * 1994-08-08 1995-03-31 Hitachi Ltd Storage circuit and one-chip memory device
US5424981A (en) * 1984-10-05 1995-06-13 Hitachi, Ltd. Memory device
US5448519A (en) * 1984-10-05 1995-09-05 Hitachi, Ltd. Memory device
JPH08123716A (en) * 1995-06-16 1996-05-17 Hitachi Ltd Memory system
JPH08152873A (en) * 1995-06-16 1996-06-11 Hitachi Ltd Data processing system
JPH08195077A (en) * 1995-01-17 1996-07-30 Internatl Business Mach Corp <Ibm> Transfer system of dram
US5592649A (en) * 1984-10-05 1997-01-07 Hitachi, Ltd. RAM control method and apparatus for presetting RAM access modes
US5923591A (en) * 1985-09-24 1999-07-13 Hitachi, Ltd. Memory circuit
US6028795A (en) * 1985-09-24 2000-02-22 Hitachi, Ltd. One chip semiconductor integrated circuit device having two modes of data write operation and bits setting operation
US6034911A (en) * 1995-10-13 2000-03-07 Nec Corporation Semiconductor memory device for a rapid random access

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61113188A (en) * 1984-07-26 1986-05-31 テキサス インスツルメンツ インコ−ポレイテツド Semiconductor memory having improved address counter
US5767864A (en) * 1984-10-05 1998-06-16 Hitachi, Ltd. One chip semiconductor integrated circuit device for displaying pixel data on a graphic display
US5719809A (en) * 1984-10-05 1998-02-17 Hitachi, Ltd. Memory device
US5450342A (en) * 1984-10-05 1995-09-12 Hitachi, Ltd. Memory device
US5475636A (en) * 1984-10-05 1995-12-12 Hitachi, Ltd. Memory device
US6359812B2 (en) 1984-10-05 2002-03-19 Hitachi, Ltd. Memory device
US5838337A (en) * 1984-10-05 1998-11-17 Hitachi, Ltd. Graphic system including a plurality of one chip semiconductor integrated circuit devices for displaying pixel data on a graphic display
US5781479A (en) * 1984-10-05 1998-07-14 Hitachi, Ltd. Memory device
US5493528A (en) * 1984-10-05 1996-02-20 Hitachi, Ltd. Memory device
US5592649A (en) * 1984-10-05 1997-01-07 Hitachi, Ltd. RAM control method and apparatus for presetting RAM access modes
US5499222A (en) * 1984-10-05 1996-03-12 Hitachi, Ltd. Memory device
US6643189B2 (en) 1984-10-05 2003-11-04 Hitachi, Ltd. Memory device
US5448519A (en) * 1984-10-05 1995-09-05 Hitachi, Ltd. Memory device
US5424981A (en) * 1984-10-05 1995-06-13 Hitachi, Ltd. Memory device
JPS61123154A (en) * 1984-11-20 1986-06-11 Fujitsu Ltd Gate-array lsi device
US5265234A (en) * 1985-05-20 1993-11-23 Hitachi, Ltd. Integrated memory circuit and function unit with selective storage of logic functions
JPS61289595A (en) * 1985-06-17 1986-12-19 Hitachi Ltd Semiconductor memory device
JPH079751B2 (en) * 1985-06-17 1995-02-01 株式会社日立製作所 Semiconductor memory device
JPS62103895A (en) * 1985-08-07 1987-05-14 テキサス インスツルメンツ インコ−ポレイテツド Semiconductor memory and operation thereof
JPH0529989B2 (en) * 1985-08-07 1993-05-06 Texas Instruments Inc
JPS6249458A (en) * 1985-08-28 1987-03-04 Ascii Corp Memory device
JPS6249457A (en) * 1985-08-28 1987-03-04 Ascii Corp Storage unit
US5923591A (en) * 1985-09-24 1999-07-13 Hitachi, Ltd. Memory circuit
US6028795A (en) * 1985-09-24 2000-02-22 Hitachi, Ltd. One chip semiconductor integrated circuit device having two modes of data write operation and bits setting operation
JPH031394A (en) * 1989-05-29 1991-01-08 Nec Corp Storage device
JPH05216741A (en) * 1992-05-20 1993-08-27 Hitachi Ltd Storage circuit and its operating mode setting method
JPH0784861A (en) * 1994-08-08 1995-03-31 Hitachi Ltd Storage circuit and one-chip memory device
JPH0784860A (en) * 1994-08-08 1995-03-31 Hitachi Ltd Information processing system
JPH08195077A (en) * 1995-01-17 1996-07-30 Internatl Business Mach Corp <Ibm> Transfer system of dram
JPH08152873A (en) * 1995-06-16 1996-06-11 Hitachi Ltd Data processing system
JPH08123716A (en) * 1995-06-16 1996-05-17 Hitachi Ltd Memory system
US6034911A (en) * 1995-10-13 2000-03-07 Nec Corporation Semiconductor memory device for a rapid random access

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