LPC47M172_07 Datasheet, PDF (61/226 Pages) SMSC Corporation – Advanced I/O Controller with Motherboard GLUE Logic

Advanced I/O Controller with Motherboard GLUE Logic
Datasheet
PHASE
Command
Execution
Result
READ ID
DATA BUS
R/W D7 D6 D5 D4 D3 D2 D1 D0
REMARKS
W 0 MFM 0 0 1 0
1
0 Commands
W 0 0 0 0 0 HDS DS1 DS0
The first correct ID
information on the
Cylinder is stored in
Data Register
R
ST0
Status information after
Command execution.
Disk status after the
Command has
completed
R
ST1
R
ST2
R
C
R
H
R
R
R
N
PHASE
Command
PERPENDICULAR MODE
DATA BUS
R/W D7 D6 D5 D4 D3 D2 D1
D0
REMARKS
W
0 00100
1
0 Command Codes
OW 0 D3 D2 D1 D0 GAP WGATE
PHASE
Command
Result
INVALID CODES
DATA BUS
R/W D7 D6 D5 D4 D3 D2 D1 D0
REMARKS
W
Invalid Codes
Invalid Command Codes
(NoOp – FDC goes into
Standby State)
R
ST0
ST0 = 80H
Note:
PHASE
Command
Result
LOCK
DATA BUS
R/W
D7
D6 D5
D4
D3 D2 D1 D0
REMARKS
W LOCK 0 0
1
0 1 0 0 Command Codes
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.
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).
SMSC/Non-SMSC Register Sets (Rev. 01-11-07)
Page 61
DATASHEET
SMSC LPC47M172