Section Page - Seagate ST506 Product Manual

SECTION
PAGE
4.0 Electrical Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 9
4.1 Control Input Lines .......................................... 14
4.1.1 Reduced Write Current .................................. 14
4.1.2 Write Gate ............................................. 15
4.1.3 Head Select 2°, 2' ....................................... 15
4.1.4 Direction In ............................................ 15
4.1.5 Step . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1.6 Drive Select 1-4 ......................................... 17
4.2 Control Output Lines ........................................ 17
4.2.1 Seek Complete ......................................... 18
4.2.2 Track 0 ................................................ 18
4.2.3 Write Fault ............................................ 18
4.2.4 Index .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 19
4.2.5 Ready ................................................. 19
4.3 Data Transfer Lines ................................
.I. ........
19
4.3.1 M FM Wr.ite Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.3.2 MFM Read Data ........................................ 21
4.3.3 Read/Write Timing ...................................... 21
4.4
Drive Selected .............................................. 21
4.5 Customer Options ........................................... 22
4.5.1 Radial Operation Option ................................. 22
4.5.2 "0" (Defeat Recal.) Operation ............................. 22
4.5.3 "H" Half Step Option .................................... 22
4.5.4 Nylon Ground Washer ................................... 22
5.0 Physical Interface .............................................. 24
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