82077AA - Intel Corporation

82077AA CHMOS SINGLE-CHIP FLOPPY DISK CONTROLLER

5 1 Data Transfer Commands 5 1 1 Read Data 5 1 2 Read Deleted Data 5 1 3 Read Track 5 1 4 Write Data 5 1 5 Write Deleted Data 5 1 6 Verify 5 1 7 Format Track 5 1 7 1 Format Fields 5 1 8 Scan Commands PAGE 12 12 13 13 14 14 14 15 15 15 15 16 16 16 16 17 17 17 17 24 24 25 26 26 26 26 27 28 29 12 12 12 12 12 2 CONTENTS 5 0 COMMAND SET DESCRIPTIONS (Contin.

Features

listed in this data sheet It supports both tape drives and 4 Mb floppy drives The 82077AA supports 4 Mb floppy drives and is capable of operation at all data rates through 1 Mbps The 82077AA-5 supports 500 300 250 Kbps data rates for high and low density floppy drives The 82077AA is fabricated with Intel’s CHMOS III technology and is available in a 68-lead PLCC (plastic) package 290166
  – 1 Figure 1 82077AA Pinout PS 2 and PC AT are trademarks of IBM May 1994 Order Number 290166-007 82077AA CHMOS Single-Chip Floppy Disk Controller CONTENTS 1 0 INTRODUCTION 1 1 Oscillator 1 2 Perpendicular .