W83877ATF Datasheet, PDF (31/191 Pages) Winbond – enhanced version from Winbonds most popular I/O chip W83877F

W83877ATF
(16) Dumpreg
PHASE R/W
Command W
Result
R
R
R
R
R
R
R
R
R
R
D7 D6 D5 D4 D3 D2 D1 D0
0
0
0
0
1
1
1
0
-------------------- PCN-Drive 0-----------------
-------------------- PCN-Drive 1 ----------------
-------------------- PCN-Drive 2-----------------
-------------------- PCN-Drive 3 ----------------
-------- SRT ----------- | -------- HUT ----------
------------ HLT -------------------------------------| ND
-------------------- SC/EOT --------------------
LOCK 0 D3 D2 D1 D0 GAP WG
0 EIS EFIFO POLL| --- FIFOTHR ---- |
--------------------PRETRK ---------------------
REMARKS
Registers placed in FIFO
(17) Perpendicular Mode
PHASE R/W D7 D6 D5 D4 D3 D2 D1 D0
REMARKS
Command W
0
0
0
1
0
0
1 0 _{Command code}
W
OW 0
D3 D2 D1 D0 GAP WG
(18) Lock
PHASE R/W D7 D6 D5 D4 D3 D2 D1 D0
REMARKS
Command W ^{LOCK 0}
0
1
0 1 0 0 _{Command code}
Result
R
0
0
0 LOCK 0
0
0
0
(19) Sense Drive Status
PHASE R/W D7
Command W
0
W
0
Result
R
D6 D5 D4 D3 D2 D1 D0
REMARKS
0
0
0
0
1
0
0 _{Command code}
0
0
0
0 HDS DS1 DS0
---------------- ST3 -------------------------
Status information about
disk drive
(20) Invalid
PHASE R/W D7 D6 D5 D4 D3 D2 D1 D0
REMARKS
Command W
------------- Invalid Codes -----------------
Invalid codes (no operation -
FDC goes into standby state)
Result
R
-------------------- ST0 ----------------------
ST0 = 80H
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Publication Release Date: April 1998
Version 0.51