JPH01191366A - Floppy disk device - Google Patents

Abstract

PURPOSE:To prevent the abrasion of media and to attain a high speed access by driving a motor only when the media is accessed and preventing the drive of the motor from being stopped when the media is continuously accessed. CONSTITUTION:When the access is generated to the media, a control commanding part 1 revolves and drives a driving part 5 through a drive control part 4. When the access is finished, a timer part 3 is activated and supervises a passing time after the end of the access. When a measured value by the timer part 3 achieves a prescribed value, the control commanding part 1 commands the drive stop to the drive control part 4 and stops the driving part 5. When the access to the media is generated before the measured value achieves the prescribed value, it is judged that the access is continuously generated and the control commanding part 1 commands drive continuation. Then, a revolving condition is maintained. Thus, the trouble of the media is prevented from being generated by the abrasion and the high speed access can be executed by maintaining the revolution when the access is continuously generated.

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention relates to a rotating floppy disk (hereinafter simply "
This invention mainly relates to a floppy disk device without a head loading mechanism for accessing the media by applying the head to it.

<Prior Art> Conventional floppy disk devices include those with a head loading mechanism and those without. In floppy disk devices without this head loading mechanism, the motor rotates with the head in contact with the media, so
Media failure occurs due to wear. In order to prevent this and extend the life of the media, a motor on/off control system is adopted in which the motor is driven only when the media is accessed, and the motor is stopped when the media is not accessed.

<Problems to be Solved by the Invention> However, with such a motor on/off control method, the motor must be started before accessing the media, and there is no waiting time for accessing the media until the rotation of the motor stabilizes. There is a need to. This waiting time occurs every time the medium is accessed, and this causes problems such as making high-speed access difficult.

This invention was made by focusing on such conventional problems, and in addition to driving the motor only when accessing the medium, it is also possible to prevent the motor from stopping when continuously accessing the medium. An object of the present invention is to provide a new floppy disk device that prevents media wear and enables high-speed access.

<Means for Solving the Problems> In order to achieve the above object, the present invention provides a floppy disk device in which rotating media is accessed by applying a head to the media, including a drive unit that rotates the media, and a drive unit that drives and stops the drive unit. A drive control unit for controlling the media, a clock unit for monitoring the elapsed time after the end of media access, and a drive control unit are instructed to continue driving until the measured value by the clock unit reaches a predetermined value. , and a control command unit that commands to stop driving when a predetermined value is reached.

<Operation> When access to the medium occurs, the control command unit rotationally drives the drive unit via the drive control unit. When the access ends, the timer starts and monitors the elapsed time after the access ends.

When the measured value by the timer reaches a predetermined value, the control command section instructs the drive control section to stop driving, thereby stopping the drive section. Therefore, even if the head hits the media, the drive unit stops, thereby preventing media failure due to wear.

On the other hand, if an access to the media occurs before the measured value by the timer reaches a predetermined value, it is determined that there is continuous access, and the control command unit instructs the drive control unit to continue driving, and keep it in rotation. Therefore, during continuous access, there is no need to wait for the rotation of the drive unit to stabilize, and high-speed access is possible.

<Embodiment> FIG. 1 shows the main structure of a floppy disk device according to an embodiment of the present invention. A floppy disk device is used to access a rotating medium by applying a head to it, and is mainly controlled by the CPU of a microcomputer.
A floppy disk controller 4 (hereinafter simply referred to as "controller 4"), etc. are electrically connected.

The controller 4 is used to control driving and stopping of a floppy disk driver 5 (hereinafter simply referred to as "driver 5"), and the driver 5 includes a motor for rotating media. The timer 3 monitors the elapsed time after the end of the media access to detect the presence or absence of continuous access, and its measured value is taken into the CPU 1 via the bus 2.

The CPU instructs the controller 4 to continue driving until the measured value by the timer 3 reaches a predetermined value, thereby maintaining the motor of the driver 5 in a rotating state. Further, when the measured value by the timer 3 reaches a predetermined value, the CPUI instructs the controller 4 to stop driving, and the rotation of the motor of the driver 5 is stopped.

FIG. 2 shows the control procedure by the CPUI,
At step 1 in the figure (indicated by rsTIJ in the figure), the CPU 1 waits for an access to the medium to occur.

Now step 1, "Did media access occur?"
If the judgment becomes “YES”, the CP is set in the next step 2.
The UI instructs the controller 4 to drive the driver 5 and rotates the motor for rotating the media. In the following step 3, it is determined whether the rotation of the motor is stable.
If the determination is 1YES, the CPU instructs the head drive unit (not shown) to write or continue access, and starts accessing the rotating medium by applying the head to the rotating medium (step 4).

When this access is completed, the timer 3 is activated in the next step 5 to monitor the presence or absence of continuous access.

If the elapsed time after the access ends reaches a predetermined value, timer 3 times up and the determination in step 6 becomes "YES".
”, and in this case, the CPU 1 determines that there is no continuous access, and instructs the controller 4 to stop the drive, and stops the motor of the driver 5, thereby preventing media failure due to wear. .

If an access to the medium occurs before timer 3 times up, the determination in step 6 is “NOoo
, the determination in step 8 is "YES", and in this case, it is determined that there is a continuous access, and the CPU stops the timer 3 and resets the timer 3, and also instructs the controller 4 to continue driving. command,
The motor of the driver 5 is maintained in a rotating state, and the rotating medium is accessed (step 4). Therefore, since the motor is not stopped during continuous access, there is no need for waiting time until the rotation of the motor stabilizes, and high-speed access is possible.

<Effects of the Invention> As described above, the present invention is provided with a timer that monitors the elapsed time after the end of media access, and this timer determines the presence or absence of continuous access to control the rotation and stop of the drive unit. Therefore, when there is no continuous access, the drive unit stops to prevent media failure due to wear, and when there is continuous access, the drive unit maintains rotation to enable high-speed access. The invention achieves remarkable effects such as achieving the purpose of the invention.

[Brief explanation of the drawing]

FIG. 1 is a circuit block diagram showing the main structure of a floppy disk device according to an embodiment of the present invention, and FIG. 2 is a flowchart showing the operating procedure of the example device of FIG.

Claims (1)

[Scope of Claims] A floppy disk device in which rotating media is accessed by applying a head to the media, comprising: a drive unit that rotates the media; a drive control unit that controls driving and stopping of the drive unit; and a device that controls access to the media. A control command that instructs the drive control unit to continue driving until the value measured by the timer reaches a predetermined value, and to stop the drive when the value measured by the timer reaches a predetermined value. A floppy disk device comprising: