DUMPREG
DATA BUS
PHASE
R/W
REMARKS
D7
D6
D5
D4
D3 D2 D1
D0
Command
W
0
0
0
0
1
1
1
0
*Note: Registers
placed in FIFO
Execution
Result
R
R
R
R
R
R
R
R
R
────── PCN-Drive 0 ───────
────── PCN-Drive 1 ───────
────── PCN-Drive 2 ───────
────── PCN-Drive 3 ───────
──── SRT ────
─────── HLT ───────
─────── SC/EOT ───────
─── HUT ───
ND
LOCK
0
0
D3
D2
D1 D0 GAP WGATE
EIS EFIF POLL
O
── FIFOTHR ──
R
──────── PRETRK ────────
READ ID
PHASE
R/W
DATA BUS
REMARKS
D7
0
0
D6
MFM
0
D5
0
0
D4
0
0
D3
1
0
D2
D1
D0
Command
Execution
W
W
0
1
0
Commands
HDS DS1 DS0
The first correct
ID information on
the Cylinder is
stored in Data
Register
Result
R
──────── ST0 ────────
Status information
after Command
execution.
Disk status after
the Command
has completed
R
R
R
R
R
R
──────── ST1 ────────
──────── ST2 ────────
──────── C ────────
──────── H ────────
──────── R ────────
──────── N ────────
SMSC DS – LPC47S45x
Page 50 of 259
Rev. 07/09/2001
DATASHEET
SMSC [ SMSC CORPORATION ]
