w83637hg Winbond Electronics Corp America, w83637hg Datasheet - Page 113

• Manufacturer Part Number: w83637hg
• Description: Winbond Lpc I/o Lpc I/o
• Manufacturer: Winbond Electronics Corp America

CRF1 (Default 0x00)
CRF2 (Default 0xFF)
CRF4 (Default 0x00)
FDD0 Selection:
Bit 7 - 6 : Boot Floppy
Bit 5, 4
Bit 3 - 2 : Density Select
Bit 1
Bit 0
Bit 7 - 6 : FDD D Drive Type
Bit 5 - 4 : FDD C Drive Type
Bit 3 - 2 : FDD B Drive Type
Bit 1 - 0 : FDD A Drive Type
Bit 7
Bit 6
Bit 5
Bit 4 - 3 : DRTS1, DRTS0: Data Rate Table select (Refer to TABLE A).
Bit 2
Bit 1:0
= 00
= 01
= 10
= 11
: Media ID1, Media ID0. These bits will be reflected on FDC's Tape Drive Register bit 7,
6.
= 00
= 01
= 10
= 11
: DISFDDWR
= 0
= 1
: SWWP
= 0
= 1
: Reserved.
: Pre-comp. Disable.
= 1
= 0
: Reserved.
= 00
= 01
= 10
= 11
: Reserved.
: DTYPE0, DTYPE1: Drive Type select (Refer to TABLE B).
Enable FDD write.
Disable FDD write(forces pins WE, WD stay high).
Normal, use WP to determine whether the FDD is write protected or not.
FDD is always write-protected.
Disable FDC Pre-compensation.
Enable FDC Pre-compensation.
FDD A
FDD B
FDD C
FDD D
Normal (Default)
Normal
1 ( Forced to logic 1)
0 ( Forced to logic 0)
Select Regular drives and 2.88 format
2 Meg Tape
Reserved
3-mode drive
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Publication Release Date: March, 2006
W83637HF/HG
Revision 1.6