JPH0380596U - - Google Patents
Info
- Publication number
- JPH0380596U JPH0380596U JP14033689U JP14033689U JPH0380596U JP H0380596 U JPH0380596 U JP H0380596U JP 14033689 U JP14033689 U JP 14033689U JP 14033689 U JP14033689 U JP 14033689U JP H0380596 U JPH0380596 U JP H0380596U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- led
- magnetic disk
- microprocessor
- disk drive
- 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
Links
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
Description
第１図は本考案の実施例を示す磁気デイスク駆
動装置のエラー表示装置の回路図、第２図はロー
／ハイレベルの切換えのインターバルを示す図、
第３図は従来の磁気デイスク駆動装置のブロツク
図、第４図はＬＥＤの点灯条件を表すインタフエ
ース回路の内部回路図である。
１……インタフエース回路、２，２５……マイ
クロプロセツサ、３……Ｄ／Ａコンバータ、４…
…加算回路、５……双方向増幅器、６……モータ
、７……エンコーダ、８……微分器、９……信号
選択回路、１０，２２……ＬＥＤドライバ、１１
，１６，２２……ＬＥＤ、１２……ドライブセレ
クト信号、１３，１９……ＮＡＮＤ回路、１４，
１５，２０，２１……反転器、１７，２３……抵
抗、１８……レシーバ、２４……ＰＮＰ型トラン
ジスタ。
FIG. 1 is a circuit diagram of an error display device for a magnetic disk drive device showing an embodiment of the present invention, and FIG. 2 is a diagram showing low/high level switching intervals.
FIG. 3 is a block diagram of a conventional magnetic disk drive device, and FIG. 4 is an internal circuit diagram of an interface circuit showing LED lighting conditions. 1...Interface circuit, 2, 25...Microprocessor, 3...D/A converter, 4...
... Addition circuit, 5 ... Bidirectional amplifier, 6 ... Motor, 7 ... Encoder, 8 ... Differentiator, 9 ... Signal selection circuit, 10, 22 ... LED driver, 11
,16,22...LED, 12...Drive select signal, 13,19...NAND circuit, 14,
15, 20, 21...Inverter, 17, 23...Resistor, 18...Receiver, 24...PNP type transistor.
Claims (1)
ロプロセツサからレデイイン信号を受けて、ＬＥ
Ｄを選択的に点灯する磁気デイスク駆動装置のエ
ラー表示装置において、 (a) ＬＥＤのカソード側に、上記ドライブセレ
クト信号とレデイ信号を受けて出力する論理回路
を接続し、 (b) 上記論理回路とＬＥＤ間をトランジスタを
介して接地するとともに、 (c) 該トランジスタは、マイクロプロセツサか
らのＬＥＤブリンク信号を受けてオン・オフする
ものであり、 (d) 該ＬＥＤブリンク信号はエラーの内容によ
つて異なるものであることを特徴とする磁気デイ
スク駆動装置のエラー表示装置。[Claims for Utility Model Registration] Receiving the drive select signal from the control device and the ready-in signal from the microprocessor, the LE
In an error display device for a magnetic disk drive device that selectively lights up D, (a) a logic circuit that receives and outputs the drive select signal and ready signal is connected to the cathode side of the LED; (b) the logic circuit (c) The transistor turns on and off in response to the LED blink signal from the microprocessor, and (d) The LED blink signal is connected to the error content. An error display device for a magnetic disk drive device, characterized in that the device is different from one another.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14033689U JPH0380596U (en) | 1989-12-05 | 1989-12-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14033689U JPH0380596U (en) | 1989-12-05 | 1989-12-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0380596U true JPH0380596U (en) | 1991-08-19 |
Family
ID=31687319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14033689U Pending JPH0380596U (en) | 1989-12-05 | 1989-12-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0380596U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008159162A (en) * | 2006-12-25 | 2008-07-10 | Hitachi Ltd | Recording / playback device |
-
1989
- 1989-12-05 JP JP14033689U patent/JPH0380596U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008159162A (en) * | 2006-12-25 | 2008-07-10 | Hitachi Ltd | Recording / playback device |
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