W83627DHG Datasheet, PDF (200/268 Pages) Winbond – WINBOND LPC I/O

W83627DHG
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BIT READ / WRITE
1
R/W
FDC DMA Mode.
0
R/W
Floppy Mode.
DESCRIPTION
0: Burst Mode is enabled
1: Non-Burst Mode.
0: Normal Floppy Mode.
1: Enhanced 3-mode FDD.
CR F1h. (Default 00h)
BIT READ / WRITE
7~6
R/W
5~4
R/W
3~2
R/W
1
R/W
0
R/W
DESCRIPTION
Boot Floppy. 00: FDD A.
10: Reserved.
01: Reserved.
11: Reserved.
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).
01: Normal.
11: 0 (Forced to logic 0).
DISFDDWR =>
0: Enable FDD write.
1: Disable FDD write (forces pins WE, WD to stay high).
SWWP =>
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
7~2 Reserved.
1~0
R/W
FDD A Drive Type.
DESCRIPTION
CR F4h. (Default 00h)
BIT READ / WRITE
DESCRIPTION
7 Reserved.
6
R/W
0: Enable FDC Pre-compensation.
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).
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Publication Release Date: Aug, 22, 2007
Version 1.4