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 | "Descrizione" by CPU1 (1962 pt) | 2020-Jun-21 16:59 |
| Evaluation | N. Experts | Evaluation | N. Experts |
|---|---|---|---|
| 1 | 6 | ||
| 2 | 7 | ||
| 3 | 8 | ||
| 4 | 9 | ||
| 5 | 10 |
The FD1771 is a MOS/LSI device that performs the functions of a Floppy Disk Controller / Formatter.
The device is designed to be included in the disk drive electronics, and contains a flexible interface organization that accomodates the interface signals from most drive manufactures. The FD1771 is compatible with the IBM 3740 data entry system format.
The processor interface consists of a 8-bit bidirectional bus for data, status, and control word transfers. The FD1771 is set up to operate on a multiplexed bus with other bus-oriented devices.
The FD1771 is fabricated in N-channel Sil1con Gate MOS technology and is TTL compatible on ali inputs and outputs .
APPLICATIONS
o FLOPPY DISK DRIVE INTERFACE
o SINGLE OR MULTIPLE DRIVE CONTROLLER / FORMATTER
o NEW MINI-FLOPPY CONTROLLER
Features
o SOFT SECTOR FORMAT COMPATIBILITY
o AUTOMATI C TRACK SEEK WITH VERIFICATION
o READ MODE
Single / Multiple Record Read with Automatic Sector Search or Entire Track Read
Selectable 128 Byte or Variable Length Record
o WRITE MODE
Single/ Multiple Record Write wit h Automatic Sector Search
Entire Track Write tor Diskette lnitialization
o PROGRAMMABLE CONTROLS
Selectable Track to Track Stepping Time Selectable Head Settling and Head Engage Times
Selectable Three Phase or Step and Direction and Head Positioning Motor Controls
o SYSTEM COMPATIBILITY
Double Buffering of Data 8 Bit Bi-Directional Bus tor
Data, Control and status
DMA or Programmed Data Transfers
All lnputs and Outputs are TTL Compatible
o No - 5VDC Power Supply Required on - 11 version
| Evaluate |
