w83627ehf Winbond Electronics Corp America, w83627ehf Datasheet - Page 105

• Manufacturer Part Number: w83627ehf
• Description: W83627ehf/ef W83627ehg/eg Winbond Lpc I/o
• Manufacturer: Winbond Electronics Corp America

CR F1h. (Default 00h)
CR F2h. (Default FFh)
CR F4h. (Default 00h)
7~6
5~4
3~2
7~6
5~4
3~2
1~0
4~3
1~0
BIT
BIT
BIT
1
0
7
6
5
2
Reserved.
Reserved.
Reserved.
READ / WRITE
READ / WRITE
READ / WRITE
R / W
R / W
R / W
R / W
R / W
R / W
R / W
R / W
R / W
R / W
R / W
R / W
Boot Floppy.
Media ID1, Media ID0. These bits will be reflected on FDC’s Tape Drive
Register bit 7, 6.
Density Select.
00: Normal.
10: 1 (Forced to logic 1).
DISFDDWR =>
0: Enable FDD write.
1: Disable FDD write (forces pins WE, WD stay high).
SWWP =>
0: Normal, use WP to determine whether the FDD is write protected or
not.
1: FDD is always write-protected.
FDD D Drive Type.
FDD C Drive Type.
FDD B Drive Type.
FDD A Drive Type.
0: Enable FDC Pre-compensation.
1: Disable FDC Pre-compensation.
Data Rate Table selection (Refer to TABLE A).
00: Select regular drives and 2.88 format.
01: 3-mode drive.
Drive Type selection (Refer to TABLE B).
W83627EHF/EF, W83627EHG/EG
-99-
00: FDD A.
10: FDD C.
10: 2 Meg Tape.
DESCRIPTION
DESCRIPTION
DESCRIPTION
01 Normal.
Publication Release Date: January 18, 2006
11: 0 (Forced to logic 0).
01: FDD B.
11: FDD D.
11: Reserved.
Revision 1.0