W83627EHF_0611 Datasheet, PDF (106/144 Pages) Winbond – WINBOND LPC I/O

W83627EHF/EF, W83627EHG/EG
Continued.
BIT READ / WRITE
DESCRIPTION
DISFDDWR =>
1
R/W
0: Enable FDD write.
1: Disable FDD write (forces pins WE, WD stay high).
SWWP =>
0
R/W
0: Normal, use WP to determine whether the FDD is write protected or
not.
1: FDD is always write-protected.
CR F2h. (Default FFh)
BIT READ / WRITE
7~6
R/W
FDD D Drive Type.
5~4
R/W
FDD C Drive Type.
3~2
R/W
FDD B Drive Type.
1~0
R/W
FDD A Drive Type.
DESCRIPTION
CR F4h. (Default 00h)
BIT READ / WRITE
DESCRIPTION
7 Reserved.
0: Enable FDC Pre-compensation.
6
R/W
1: Disable FDC Pre-compensation.
5 Reserved.
Data Rate Table selection (Refer to TABLE A).
4~3
R/W
00: Select regular drives and 2.88 format.
01: 3-mode drive.
10: 2 Meg Tape.
11: Reserved.
2 Reserved.
1~0
R/W
Drive Type selection (Refer to TABLE B).
CR F5h. (Default 00h)
BIT READ / WRITE
7~0
R/W
Same as FDD0 of CR F5h.
DESCRIPTION
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