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FDC37C78-HT Datasheet(PDF) 43 Page - Microchip Technology

No. de pieza FDC37C78-HT
Descripción Electrónicos  Floppy Disk Controller
PDF  82 Pages
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Fabricante Electrónico  MICROCHIP [Microchip Technology]
Página de inicio  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

FDC37C78-HT Datasheet(HTML) 43 Page - Microchip Technology

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PERPENDICULAR MODE
DATA BUS
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
0
0
0
1
0
0
1
0
Command Codes
OW
0
D3
D2
D1
D0
GAP
WGATE
INVALID CODES
DATA BUS
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
───── Invalid Codes ─────
Invalid Command Codes
(NoOp - fdc goes into Standby
State)
Result
R
─────── ST0 ───────
ST0 = 80H
LOCK
DATA BUS
PHASE
R/W
D7
D6
D5
D4
D3
D2
D1
D0
REMARKS
Command
W
LOCK
0
0
1
0
1
0
0
Command Codes
Result
R
0
0
0
LOCK
0
0
0
0
SC is returned if the last command that was issued was the Format command. EOT is returned if the last
command was a Read or Write.
NOTE: These bits are used internally only. They are not reflected in the Drive Select pins. It is the user's
responsibility to maintain correspondence between these bits and the Drive Select pins (DOR).



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