W83977A Winbond Electronics Corp America, W83977A Datasheet - Page 36
W83977A
Manufacturer Part Number
W83977A
Description
Winbond I/O
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W83977A.pdf
(160 pages)
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(16) Dumpreg
(17) Perpendicular Mode
(18) Lock
(19) Sense Drive Status
(20) Invalid
Command
Result
Command
Command
Result
Command
Result
Command
Result
PHASE
PHASE
PHASE
PHASE
PHASE
R/W
R/W
R/W
R/W
R/W
W
W
W
W
R
R
R
R
R
R
R
R
R
R
R
W
W
W
R
R
LOCK 0
OW
D7
D7
D7
0
D7
-----------------------PRETRK -------------------------
D7
0
0
0
----------------------- PCN-Drive 0--------------------
----------------------- PCN-Drive 2--------------------
----------------------- PCN-Drive 1 -------------------
----------------------- PCN-Drive 3 -------------------
--------SRT ------------------ | --------- HUT --------
----------- HLT -----------------------------------| ND
------------------------ SC/EOT ----------------------
0
0 EIS EFIFO POLL | ------ FIFOTHR --------
LOCK 0 D3 D2 D1 D0 GAP WG
------------- Invalid Codes -----------------
---------------- ST3 -------------------------
-------------------- ST0 ----------------------
D6
0
0
D6
D6
0
0
D6
D6
0
0
D3
0
0 LOCK 0
0
0
0
D5
D5
D5
D5
D5
0
D2
1
0
0
0
1
D4
D4
D4
D4
D4
0 HDS DS1 DS0
D1 D0 GAP WG
1
0
0
0
D3
D3
D3
D3
-28-
D3
1
0
1
1
0
D2
D2
D2
D2
D2
1
0
0
1
0
D1
D1
D1
D1
D1
0
0
0
0
0
D0
D0
D0
D0
D0
Publication Release Date: April 1998
Invalid codes (no operation-
FDC goes to standby state)
ST0 = 80H
Command Code
Status information about
disk drive
Command Code
Command Code
Registers placed in FIFO
W83977TF
REMARKS
REMARKS
REMARKS
REMARKS
PRELIMINARY
REMARKS
Revision 0.62
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