JPS6415354U - - Google Patents
Info
- Publication number
- JPS6415354U JPS6415354U JP10971987U JP10971987U JPS6415354U JP S6415354 U JPS6415354 U JP S6415354U JP 10971987 U JP10971987 U JP 10971987U JP 10971987 U JP10971987 U JP 10971987U JP S6415354 U JPS6415354 U JP S6415354U
- Authority
- JP
- Japan
- Prior art keywords
- spindle motor
- timer circuit
- generated
- control signal
- magnetic disk
- 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
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
Landscapes
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
Description
第１図はこの考案の一実施例である磁気デイス
ク装置における制御方式を示す回路図、第２図は
第１図の磁気デイスク装置における制御方式の各
部のタイミング波形を示す図、第３図は従来の磁
気デイスク装置におけるデータ読出し制御方式を
示す回路図である。
図において、１…ＮＡＮＤ（ナンド）回路、２
…タイマ回路、３…インバータ、１１…磁気デイ
スク装置、１２…磁気デイスク制御用ＬＳＩ、１
３…ＡＮＤ（アンド）回路、１１１…ＩＮＤＥＸ
１信号、１１２…ＲＥＡＤＹ信号、１２１…ＩＮ
ＤＥＸ２信号、Ａ，Ｂ，Ｃ，Ｄ…タイミング波形
、ａ…モータＯＮ信号、ｂ…インデツクス信号、
ｃ…タイマ回路出力、ｄ…インデツクス出力、ｅ
，ｆ，ｇ，ｈ…波形、Ｔ…設定時間である。なお
、各図中、同一符号は同一、又は相当部分を示す
。
FIG. 1 is a circuit diagram showing a control method in a magnetic disk device that is an embodiment of this invention, FIG. 2 is a diagram showing timing waveforms of each part of the control method in the magnetic disk device shown in FIG. 1, and FIG. FIG. 2 is a circuit diagram showing a data read control method in a conventional magnetic disk device. In the figure, 1...NAND circuit, 2
...Timer circuit, 3...Inverter, 11...Magnetic disk device, 12...Magnetic disk control LSI, 1
3...AND circuit, 111...INDEX
1 signal, 112...READY signal, 121...IN
DEX 2 signal, A, B, C, D...timing waveform, a...motor ON signal, b...index signal,
c...Timer circuit output, d...Index output, e
, f, g, h... waveform, T... setting time. In each figure, the same reference numerals indicate the same or equivalent parts.
Claims (1)
回転によりインデツクスパルスを発生するパルス
発生回路と、タイマ回路を備え、このタイマ回路
は上記スピンドルモータの回転開始と共に作動を
始め、このスピンドルモータの起動時間に設定し
た時間経過後に制御信号を発生するように構成し
、上記タイマ回路の制御信号が発生した後、装置
外に出力する信号の禁止を解除することを特徴と
する磁気デイスク装置。 It is equipped with a spindle motor, a pulse generation circuit that generates index pulses by the rotation of this spindle motor, and a timer circuit, and this timer circuit starts operating when the spindle motor starts rotating, and is set to the startup time of this spindle motor. A magnetic disk device, characterized in that the control signal is generated after a lapse of time, and after the control signal of the timer circuit is generated, the prohibition of the signal output to the outside of the device is canceled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10971987U JPS6415354U (en) | 1987-07-17 | 1987-07-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10971987U JPS6415354U (en) | 1987-07-17 | 1987-07-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6415354U true JPS6415354U (en) | 1989-01-26 |
Family
ID=31346218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10971987U Pending JPS6415354U (en) | 1987-07-17 | 1987-07-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6415354U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60254454A (en) * | 1984-05-31 | 1985-12-16 | Toshiba Corp | Floppy disk device |
| JPS6297171A (en) * | 1985-10-24 | 1987-05-06 | Nec Corp | Floppy disk device |
-
1987
- 1987-07-17 JP JP10971987U patent/JPS6415354U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60254454A (en) * | 1984-05-31 | 1985-12-16 | Toshiba Corp | Floppy disk device |
| JPS6297171A (en) * | 1985-10-24 | 1987-05-06 | Nec Corp | Floppy disk device |
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