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UM8398 Datasheet Floppy Disk Controller

Manufacturer: Unicorn Microelectronics

Overview: UNICOR~ MICROELECTRONIC~ .UMw -r-s-.2-.33 -ht UM8398 Single-Chip Floppy Disk.

General Description

The UM8398 is a VLSI Floppy Disk Controller (FDC) chip, which contains the circuitry and c9ntrol functions for interfacing a processor with up to 2 floppy disk drives.

It Is capable of supporting 360K Bytes, 1.2M Bytes (in 5%'' diskette drives), 720K Bytes, and 1.44M Bytes, (in 3Y:i'' diskette drives) FDDs using FM/MFM-coded, and double sided recording.

UM8398 includes an internal data separator, write prepensation, circuit address decoder, timing control and other control logics.

Key Features

  • IBM PC XT/AT drive system compatible.
  • Supports 2 drives (MS-DOS support).
  • 1.2M/360K/720K format selectable.
  • IBM PC drive system address decoder.
  • Only 3 components for the drive.
  • Internal write precompensation circuit; precompensation values: 250-125 ns.
  • Internal data separator circuit.
  • Supports to control 8", 5%", 3'h" drives General.

More Datasheets from Unicorn Microelectronics

Part Number Description
UM83C001 Hard Disk Cont{oller
UM83C002 RAM Buffer Controller

UM8398 Distributor