JPH03113546A - Storage - Google Patents

Storage

Info

Publication number
JPH03113546A
JPH03113546A JP25293789A JP25293789A JPH03113546A JP H03113546 A JPH03113546 A JP H03113546A JP 25293789 A JP25293789 A JP 25293789A JP 25293789 A JP25293789 A JP 25293789A JP H03113546 A JPH03113546 A JP H03113546A
Authority
JP
Japan
Prior art keywords
ram
rom
signal line
bus
printed board
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
JP25293789A
Other languages
Japanese (ja)
Inventor
Yoshihiro Suzuki
鈴木 祐宏
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP25293789A priority Critical patent/JPH03113546A/en
Publication of JPH03113546A publication Critical patent/JPH03113546A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To use either side of a printed board for a ROM to store a program and to save this program to the writable RAM of the other side by securing an access to either upper or rear side of the printed board turned upward and furthermore changing the types of a memory according to the side of the printed board. CONSTITUTION:When a RAM 11 is used, a connection terminal part 22 is connected to a host system so that the packing side of the RAM 11 is up. At the same time, the voltage of a memory selection signal line 18 is set at a high level set previously. A switch part 17 distributes a connection bus 19 led from the part 22 to an address bus 14, a data bus 15, and a read/write control signal line 16 so that the connection is secured between the bus 19 and the RAM 11. At the same time, the part 17 activates a RAM selection signal line 20. Thus it is possible to use a recording device 1 as a RAM. When a ROM 13 is used, a printed board is turned over and the terminal part 22 is connected to the host system so that the mounting side of the ROM 13 is up. Thus the device 1 is used as a ROM.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は記憶装置に関し、特に小型薄型で、マイクロプ
ロセッサなどを含まないプリント基板に実装されて成る
記憶装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a storage device, and particularly to a storage device that is small and thin and is mounted on a printed circuit board that does not include a microprocessor or the like.

〔従来の技術〕[Conventional technology]

従来、この種の記憶装置は、プリント基板にROMか又
はRAMの一種のメモリ素子が実装されてプリント基板
の一端の接続端子にメモリのアドレス端子やデータ端子
に加え、書込み、読出しなどの制御信号端子が接続され
、ホスト装置とのデータの授受およびホスト装置に対し
記憶装置からの種別情報(ROM又はRAM)などの読
出しができる構成になっていて、種別情報としては一種
類しか読出しができない構成になっていた。
Conventionally, in this type of storage device, a type of memory element such as ROM or RAM is mounted on a printed circuit board, and a connection terminal at one end of the printed circuit board is connected to the address terminal and data terminal of the memory, as well as control signals such as writing and reading. The terminal is connected and the configuration is such that data can be exchanged with the host device and type information (ROM or RAM) etc. can be read from the storage device to the host device, but only one type of type information can be read. It had become.

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

上述した従来の記憶装置は、プリント基板の接続端子に
実装されているメモリ素子のアドレス線やデータ線に加
えて、書込み、読出しなどの制御信号線が接続され、ホ
スト装置とのデータの授受、ホスト装置に対し記憶装置
の種別情報などの読出しができる構成になっていて、種
別識別情報としでは一種類のものしかホスト装置に返せ
ない構成となっているので、続出専用のメモリ(ROM
)と書込可能のメモリ(R,AM)の両方を有すること
ができないという欠点が1色る。
In the conventional storage device described above, in addition to the address line and data line of the memory element mounted on the connection terminal of the printed circuit board, control signal lines such as writing and reading are connected, and data can be exchanged with the host device. The host device is configured to be able to read storage device type information, etc., and only one type of type identification information can be returned to the host device.
) and writable memory (R, AM).

〔課題を解決するための手段〕[Means to solve the problem]

本発明の記憶装置は、プリン1へ基板上に実装されたR
OMと、バラブリバックアップされたFi、 AMと、
ボス1〜システムとの複数の接続端子の配列が接続端面
の中心て点対称となった接続端子部と、前記接続端子の
うち予め設定した特定の端子の入力端子のレベルにより
残りの前記接続端子の使用法を切換えて前記ホストシス
テムから前記R,(’) Mにアクセス可とするか又は
前記11. A Mにアクセス可とするか選択する切換
部とを有している。
The storage device of the present invention has R mounted on a substrate to a printer 1.
OM, randomly backed up Fi, AM,
A connecting terminal part in which a plurality of connecting terminals with the boss 1 to the system are arranged point-symmetrically with respect to the center of the connecting end surface, and the remaining connecting terminals are arranged according to the level of the input terminal of a preset specific terminal among the connecting terminals. The usage of R and (') M can be changed from the host system, or the method described in 11. It has a switching section for selecting whether to allow access to AM.

〔実施例〕〔Example〕

次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.

第1図は本発明の一実施例を示すブロック図である。FIG. 1 is a block diagram showing one embodiment of the present invention.

第1図において、本実施例の記憶装置1はプリント基板
(図示省略)上に実装されたROM13と、バッテリ1
2でバックアップされた11.AMllと、ホストシス
テム(図示省略)との複数の接続端子と配列が接続端子
面の中心で点対称となった接続端子部22と、RAM1
 ]、、ROM13にア1〜レスバス14.データバス
]5.リードライト制御信号線16て接続しさt、にR
AM1.1にはR,A Mセレクト信号線20で接続し
ROM13にはROMセレクト信号線21で接続し且つ
接続端子部22にはメモリ選択信号線18と接続バス1
つとで接続する切換郡部17とを有して構成していて、
RAMIIおよびR,0M1−3はプリント基板内一方
の面(表面)にRAMIIが他方の面(裏面)にROM
13が実装されている。
In FIG. 1, a storage device 1 of this embodiment includes a ROM 13 mounted on a printed circuit board (not shown) and a battery 1.
11. Backed up with 2. A connection terminal section 22 with a plurality of connection terminals between the AMll and the host system (not shown) arranged symmetrically with respect to the center of the connection terminal surface, and the RAM1.
],, ROM 13 contains A1~Res bus 14. data bus]5. Connect the read/write control signal line 16 to R.
AM1.1 is connected to the R, AM select signal line 20, ROM13 is connected to the ROM select signal line 21, and the connection terminal section 22 is connected to the memory selection signal line 18 and the connection bus 1.
and a switching section 17 connected to the
RAMII and R,0M1-3 have RAMII on one side (front side) of the printed circuit board and ROM on the other side (back side)
13 have been implemented.

次に、本実施例の動作について説明する。Next, the operation of this embodiment will be explained.

今、RAMIIを使用する場合には、RAM 11実装
側を表面になるように接続端子部22をホストシステム
側に接続する。このとき、メモリ選択信号線]8の電圧
レベルは予め設定した電圧レベルの“ハイ′°に設定さ
れ、切換部17は接続端子部22からの接続バス1つを
RAMIIに接続できろようにアドレスバス14.デー
タバス15゜リードライト制御信号線16に振り分ける
共にRAMセレクト信号線20をアクティブする。
When using RAMII, connect the connection terminal section 22 to the host system side with the RAM 11 mounted side facing up. At this time, the voltage level of the memory selection signal line]8 is set to a preset voltage level of "high", and the switching section 17 sets the address so that one connection bus from the connection terminal section 22 can be connected to the RAM II. The bus 14 and the data bus 15 are distributed to the read/write control signal line 16 and the RAM select signal line 20 is activated.

この結果、ホストシステムは記憶装置1を17ΔMとし
て使用することかできる。
As a result, the host system can use the storage device 1 as 17ΔM.

次に、ROM]3を使用する場合には、プリント基板を
裏返してROM1.3の実装側を表面になるように接続
端子部22をポス1−システム側に接続する。このとき
メモリ選択信号線]8の電圧レベルは予め設定した電圧
レベルの゛ロー“に設定され、切換部17は接続端子部
22からの接続バス19をROM]3に接続できるよう
にアI・レスバス14.データバス15.リードライト
制御信号線16に振り分ける共に11.0 Mセレクト
信号線21をアクティブにする。
Next, when using the ROM 3, turn the printed circuit board over and connect the connection terminal section 22 to the POS 1-system side so that the mounting side of the ROM 1.3 is on the front side. At this time, the voltage level of the memory selection signal line ]8 is set to a preset voltage level of ``low'', and the switching section 17 switches the memory select signal line]8 to connect the connection bus 19 from the connection terminal section 22 to the ROM]3. 11.0 M select signal line 21 is activated.

この結果、ホストシステムは記憶装置1をROMとして
使用することができる。
As a result, the host system can use the storage device 1 as a ROM.

本実施例では2種類のメモリとしてRAM  FLOM
を使用することで説明したが、=っのメモリ形態はどの
ようをものてあ−)てもよい。
In this embodiment, there are two types of memory: RAM FLOM.
Although the explanation has been made by using ``='', any memory format may be used.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明は、プリント基板の裏・表の
どちらの面を上にしてもアクセスが可能で、しかもプリ
ンI・基板面の向きにより、メモリ独別を変えることが
できるようにすることにより、例えば、一方を読出専用
のROMとしてプログラムを格納し、ホストにロードし
、ホストで作成したデータを他方の書込可能なRAMに
セーブするという使い方ができ、また、ポストとのイン
タフェース士は、2種類のメモリを持つ記憶装置という
ような認識とする必要をなくすことができる効果がある
。また例えば、プリント基板の表、裏各面に、その面を
見えるようにしたときに使えるメモリ種別を示すラベル
等の表示をしておくことによって、ユーザが目でプリン
ト基板の面を見て接続するという自然な操作でメモリ種
別を選択できる効果がある。
As explained above, the present invention allows access whether the back or front side of the printed circuit board is facing up, and also allows memory isolation to be changed depending on the orientation of the printed circuit board and the surface of the board. This allows, for example, to store a program on one side as a read-only ROM, load it onto the host, and save data created on the host on the other side's writable RAM. This has the effect of eliminating the need to recognize a storage device having two types of memory. For example, by displaying labels on the front and back sides of a printed circuit board that indicate the type of memory that can be used when that side is visible, the user can visually check the side of the printed circuit board and make connections. This has the effect of allowing you to select the memory type with a natural operation.

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

第1図は本発明の一実施例を示すブロック図である。 1・・・記憶装置、11 ・RA M、12・・・バラ
ブリ、13・・・ROM、14・・・アドレスバス、1
5・・・データバス、16・・ソー。ライ1へ制御信号
線、17・・切換部、18・・・メモリi′f1択(+
:j ”j線、19・・接わ゛Cハス、20・・・RA
Mセレクト仏号線、21・・・ROMセレクト信号線、
22・・・接続端子部。
FIG. 1 is a block diagram showing one embodiment of the present invention. 1... Storage device, 11 ・RAM, 12... Discrete, 13... ROM, 14... Address bus, 1
5...Data bus, 16...So. Control signal line to line 1, 17...switching section, 18...memory i'f1 selection (+
:j ”J line, 19... C lotus, 20... RA
M select Buddha signal line, 21...ROM select signal line,
22... Connection terminal section.

Claims (1)

【特許請求の範囲】[Claims] プリント基板上に実装されたROMと、バッテリバック
アップされたRAMと、ホストシステムとの複数の接続
端子の配列が接続端面の中心で点対称となった接続端子
部と、前記接続端子のうち予め設定した特定の端子の入
力電圧のレベルにより残りの前記接続端子の使用法を切
換えて前記ホストシステムから前記ROMにアクセス可
とするか又は前記RAMにアクセス可とするか選択する
切換部とを有することを特徴とする記憶装置。
A connecting terminal portion in which a plurality of connecting terminals between the ROM mounted on the printed circuit board, the battery-backed RAM, and the host system are arranged symmetrically about the center of the connecting end surface, and a preset portion of the connecting terminals. and a switching unit that switches the usage of the remaining connection terminals depending on the input voltage level of the specific terminal, and selects whether the host system can access the ROM or the RAM. A storage device characterized by:
JP25293789A 1989-09-27 1989-09-27 Storage Pending JPH03113546A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25293789A JPH03113546A (en) 1989-09-27 1989-09-27 Storage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25293789A JPH03113546A (en) 1989-09-27 1989-09-27 Storage

Publications (1)

Publication Number Publication Date
JPH03113546A true JPH03113546A (en) 1991-05-14

Family

ID=17244236

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25293789A Pending JPH03113546A (en) 1989-09-27 1989-09-27 Storage

Country Status (1)

Country Link
JP (1) JPH03113546A (en)

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