FDC37C669_07 SMSC [SMSC Corporation], FDC37C669_07 Datasheet - Page 56

• Manufacturer Part Number: FDC37C669_07
• Description: PC 98/99 Compliant Super I/O Floppy Disk Controller with Infrared Support
• Manufacturer: SMSC [SMSC Corporation]

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).
Command
Command
Result
Command
Result
PHASE
PHASE
PHASE
R/W
R/W
R/W
W
W
W
R
R
D7
OW
D7
LOCK
0
D7
0
D6
D6
0
0
D6
PERPENDICULAR MODE
D5
0
0
D5
D3
0
Invalid Codes
DATA BUS
INVALID CODES
D5
D4
0
0
D4
D2
1
ST0
DATA BUS
DATA BUS
LOCK
D3
LOCK
56
D3
D1
D4
0
1
D2
D2
D0
0
D3
0
0
D1
GAP
D1
1
D2
1
0
D0
D1
WGATE
0
0
Invalid Command Codes (No
Op - FDC37C669 goes into
Standby State)
ST0 = 80H
D0
0
D0
0
0
REMARKS
Command Codes
Command Codes
REMARKS
REMARKS