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UPD765A - Single / Double Density Floppy-Disk Controller

Datasheet Summary

Description

The uPD765A/B is an LSI floppy disk controller (FDC) chip which contains the circuitry and control functions for interfacing a processor to 4 floppy disk drives.

It is capableof either IBM 3740singledensity format (FM), or IBM System 34 double density format (MFM) including double-sided recording.

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Datasheet preview – UPD765A

Datasheet Details

Part number UPD765A
Manufacturer NEC Electronics
File Size 335.09 KB
Description Single / Double Density Floppy-Disk Controller
Datasheet download datasheet UPD765A Datasheet
Additional preview pages of the UPD765A datasheet.

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Full PDF Text Transcription

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NEC NEC Electronics Inc. uPD765A/uPD765B Single/Double Density Floppy-Disk Controller Description The uPD765A/B is an LSI floppy disk controller (FDC) chip which contains the circuitry and control functions for interfacing a processor to 4 floppy disk drives. It is capableof either IBM 3740singledensity format (FM), or IBM System 34 double density format (MFM) including double-sided recording. The uPD765A/B provides control signals which simplify the design of an external phase-locked loop and write precompensation circuitry. The FDC simplifies and handles most of the burdens associated with implementing a floppy disk interface.
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