Table 17 鈥?Description of Command Symbols
SYMBOL
WGATE
NAME
Write Gate
DESCRIPTION
Alters timing of WE to allow for pre-erase loads in perpendicular
drives.
6.5.3
Instruction Set
Table 18 鈥?Instruction Set
READ DATA
DATA BUS
D5 D4 D3 D2 D1 D0
REMARKS
SK
0
0
1
1
0 Command Codes
0
0
0 HDS DS1 DS0
C
Sector ID information prior to
Command execution.
H
R
N
EOT
GPL
DTL
Data transfer between the
FDD and system.
ST0
Status information after Com-
mand execution.
ST1
ST2
C
Sector ID information after
Command execution.
H
R
N
PHASE
Command
R/W
W
W
W
W
W
W
W
W
W
D7
MT
0
D6
MFM
0
Execution
Result
R
R
R
R
R
R
R
SMSC DS 鈥?LPC47M14X
Page 43
Rev. 03/19/2001