basf 80307-058 BASF 6138 Mini Disk Apr83 free download

File name 80307-058_BASF_6138_Mini_Disk_Apr83.pdf

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 a