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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