FORMAT A TRACK
DATA BUS
PHASE
Command
R/W D7
D6
MFM
0
D5 D4 D3
D2
1
D1
0
D0
1
REMARKS
Command Codes
W
W
W
W
W
W
0
0
0
0
0
0
1
0
HDS DS1 DS0
N
Bytes/Sector
Sectors/Cylinder
Gap 3
SC
GPL
D
Filler Byte
Execution for
Each Sector
Repeat:
W
C
Input Sector Parameters
W
W
W
H
R
N
FDC formats an entire
cylinder
Result
R
ST0
Status information after
Command execution
R
R
R
R
R
R
ST1
ST2
Undefined
Undefined
Undefined
Undefined
RECALIBRATE
DATA BUS
R/W D7 D6 D5 D4 D3 D2
PHASE
D1
D0
REMARKS
Command
W
W
0
0
0
0
0
0
0
0
0
0
1
0
1
1
Command Codes
DS1 DS0
Execution
Head retracted to Track 0
Interrupt.
SENSE INTERRUPT STATUS
DATA BUS
R/W D7 D6 D5 D4 D3 D2 D1 D0
PHASE
Command
Result
REMARKS
Command Codes
W
R
0
0
0
0
1
0
0
0
ST0
Status information at the end
of each seek operation.
R
PCN
SPECIFY
DATA BUS
PHASE
R/W D7 D6 D5 D4 D3 D2 D1 D0
REMARKS
Command
W
W
W
0
0
0
0
0
0
1
HUT
1
Command Codes
SRT
HLT
ND
SMSC DS – LPC47M14X
Page 47
Rev. 03/19/2001
SMSC [ SMSC CORPORATION ]
