W83977F-A Datasheet, PDF (135/182 Pages) Winbond – WINBOND I/O

W83977F-A/ W83977G-A/ W83977AF-A/ W83977AG-A
DTYPE1
DPYTE0
DRATE1
0
0
1
0
0
0
0
0
0
0
0
1
0
1
X
1
0
X
1
1
0
Note: X means don't care.
CRF4 (Default 0x00)
FDD0 Selection:
Bit 7 : Reserved.
Bit 6 : Precomp. Disable.
= 1 Disable FDC Precompensation.
= 0 Enable FDC Precompensation.
Bit 5 : Reserved.
DRATE0
1
0
1
0
X
X
1
Bit 4-3 : DRTS1, DRTS0 : Data Rate Table select (Refer to TABLE A).
= 00 Select Regular drives and 2.88 format
= 01 Specifical application
= 10 2 Meg Tape
= 11 Reserved
Bit 2 : Reserved.
Bit 1:0 : DMOD0, DMOD1 : Drive Model select (Refer to TABLE B).
CRF5 (Default 0x00)
FDD1 Selection : Same as FDD0 of CRF4.
SELDEN
1
1
0
0
0
1
0
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Publication Release Date: May 2006
Revision 0.60