W83977F-A Datasheet, PDF (35/182 Pages) Winbond – WINBOND I/O

W83977F-A/ W83977G-A/ W83977AF-A/ W83977AG-A
(17) Perpendicular Mode
PHASE R/W
D7 D6 D5 D4 D3 D2 D1 D0
Command
W
0 0 010 01 0
W OW 0 D3 D2 D1 D0 GAP WG
REMARKS
Command Code
(18) Lock
PHASE
Command
Result
R/W
W
R
D7 D6 D5 D4 D3 D2 D1 D0
LOCK 0 0 1 0 1 0 0
0 0 0 LOCK 0 0 0 0
REMARKS
Command Code
(19) Sense Drive Status
PHASE
Command
Result
R/W
W
W
R
D7 D6 D5 D4 D3 D2 D1 D0
00 0 00 10 0
0 0 0 0 0 HDS DS1 DS0
---------------- ST3 -------------------------
REMARKS
Command Code
Status information about disk
drive
(20) Invalid
PHASE R/W
Command
W
Result
R
D7 D6 D5 D4 D3 D2 D1 D0
------------- Invalid Codes -----------------
-------------------- ST0 ----------------------
REMARKS
Invalid codes (no operation-
FDC goes to standby state)
ST0 = 80H
5.2 Register Descriptions
There are several status, data, and control registers in W83977F/G, W83977AF/AG. These registers
are defined below:
ADDRESS
REGISTER
OFFSET
base address + 0
base address + 1
base address + 2
base address + 3
base address + 4
base address + 5
base address + 7
READ
SA REGISTER
SB REGISTER
TD REGISTER
MS REGISTER
DT (FIFO) REGISTER
DI REGISTER
WRITE
DO REGISTER
TD REGISTER
DR REGISTER
DT (FIFO) REGISTER
CC REGISTER
Publication Release Date: May 2006
-27 -
Revision 0.60