Service Manuals, User Guides, Schematic Diagrams or docs for : basf 80307-058_BASF_6138_Mini_Disk_Apr83

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80307-058_BASF_6138_Mini_Disk_Apr83


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BASF Aktiengesellschaft




                       B A S F   6 1 3 8

                       M I N I DISK DRIVE




Mannheim, April 1983                        Spec.Nr. 80307-058
VID/WMS                                     Rev. 01
                                            Pages: 20
                         CONTENTS


1   .   Product Outline .......................... 1
    1-1   Feature ................................ 1
    1-2   Specifications ......................... 1

2   .   Interface ................................ 4
2-1       Signal Interface ....................... 4
2-2       Table of Connector Used ................ 5
2-3       Input/Output Interface ................. 6
2-4       Timing Chart .......................... 10
2-5       Multiple Drive Connection System ...... 13

3   .   Description of Functions ..........,..... 14
3-1       Overall Block Diagram .................. 14
3-2       Circuit Block Diagram ........'......... 14
3-3       Jumper Functions ...................... 14
3-4       Arrangement of Jumper Pins ............ 15

4   .   Dimension Specifications ................ 16
4-1       Installation Method ................... 16
4-2       Exterior of Unit ...................... 17

5.      Handling Mini Floppy Disks   .............. 18
6.      Format Example   .......................... 19
1. Product Outline
1-1 Feature
    This MDD employs a high performance direct-drive spindle
    motor, resulting in stability of media rotation and also
    freedom from maintenance due to the elimination of a
    driving belt.    It also employs a high-speed stepping
    motor and steel belt drive system, permitting speedier
    seek-access by the head, and making for improved track
    positioning accuracy.

1-2 Specifications
1-2-1 Performance

                                                     MDD221
   Recording density           per diskette        1M byte
                               per track           6.25K byte
   Data transfer speed                             250K bit/sec
   Access     Track-to-track shift time             3ms MAX
   time       Seek settling time                   20ms MAX
              Average access time                  9Sms
              Head load waiting time               25ms MAX
              Media rotating speed                 300 rpm
              Average rotation waiting time        looms
              spindle motor starting time          1s MAX
   Recording density     (inner periphery)         5922 BPI
   Number of tracks                                160
   Modulation system                               FM/MFM
   Recommended media                           BASF FlexyDisk
                                               5 -25"-7/96
Note 1:   The waiting time during seek is the track-to-track
          shift time + seek settling time.
Note 2:   The average access time is the average track-to-
          track shift time + seek settling time.
1-2-2 Boundary Conditions

           Operating ambient          5   - 45OC
           temperature
           Temperature during         -40       - 62OC
      '    transport
           Storage temperature        -22 -.5S



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