JPH02144199U - - Google Patents

Info

Publication number
JPH02144199U
JPH02144199U JP5280489U JP5280489U JPH02144199U JP H02144199 U JPH02144199 U JP H02144199U JP 5280489 U JP5280489 U JP 5280489U JP 5280489 U JP5280489 U JP 5280489U JP H02144199 U JPH02144199 U JP H02144199U
Authority
JP
Japan
Prior art keywords
serial
data
access memory
data register
address
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
JP5280489U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP5280489U priority Critical patent/JPH02144199U/ja
Publication of JPH02144199U publication Critical patent/JPH02144199U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Static Random-Access Memory (AREA)
  • Image Input (AREA)

Description

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

第1図は本考案の一実施例のブロツク図、第2
図は第1図のセレクタの構成図、第3図は動作説
明に供するタイミングチヤート、第4図は従来例
のブロツク図、第5図はRAM部のメモリセルと
SAM部のデータレジスタとのアドレスの対応関
係を示す図、第6図は第4図の従来例のタイミン
グチヤートである。 6……メモリセル、7……データレジスタ、8
……セレクタ、9……アツプダウンカウンタ部。
Figure 1 is a block diagram of one embodiment of the present invention;
The figure is a block diagram of the selector in Figure 1, Figure 3 is a timing chart to explain the operation, Figure 4 is a block diagram of the conventional example, and Figure 5 is the address of the memory cell in the RAM section and the data register in the SAM section. FIG. 6 is a timing chart of the conventional example shown in FIG. 4. 6...Memory cell, 7...Data register, 8
...Selector, 9...Up-down counter section.

Claims (1)

【実用新案登録請求の範囲】 ランダムアクセスメモリ部とシリアルアクセス
メモリ部とを備え、前記シリアルアクセスメモリ
部は、シリアルデータが入出力されるデータレジ
スタと、シリアルクロツクを計数して前記データ
レジスタのアドレスを発生するセレクタ回路とを
有し、前記シリアルデータの入出力を順方向に行
うデユアルポートメモリにおいて、 前記セレクタ回路は、前記シリアルデータの入
出力方向を、前記順方向または逆方向のいずれか
に切換えるための切換信号に基づいて、前記シリ
アルクロツクによつて前記データレジスタのアド
レスをインクリメントまたはデクリメントするア
ツプダウンカウンタ部を有することを特徴とする
デユアルポートメモリ。
[Claims for Utility Model Registration] Comprised of a random access memory section and a serial access memory section, the serial access memory section includes a data register into which serial data is input/output, and a data register that counts serial clocks to input and output serial data. and a selector circuit that generates an address, and inputs and outputs the serial data in a forward direction. 1. A dual port memory comprising an up/down counter section that increments or decrements the address of the data register using the serial clock based on a switching signal for switching to a dual port memory.
JP5280489U 1989-05-08 1989-05-08 Pending JPH02144199U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5280489U JPH02144199U (en) 1989-05-08 1989-05-08

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5280489U JPH02144199U (en) 1989-05-08 1989-05-08

Publications (1)

Publication Number Publication Date
JPH02144199U true JPH02144199U (en) 1990-12-06

Family

ID=31573425

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5280489U Pending JPH02144199U (en) 1989-05-08 1989-05-08

Country Status (1)

Country Link
JP (1) JPH02144199U (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6121540A (en) * 1984-07-09 1986-01-30 Nec Corp Memory device
JPS63147244A (en) * 1986-12-10 1988-06-20 Fujitsu Ltd Picture memory circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6121540A (en) * 1984-07-09 1986-01-30 Nec Corp Memory device
JPS63147244A (en) * 1986-12-10 1988-06-20 Fujitsu Ltd Picture memory circuit

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